Transcript
LT1332 Wide Supply Range Low Power RS232 Transceiver with 12V VPP Output for Flash Memory DESCRIPTION
OBSOLETE: FOR INFORMATION PURPOSES ONLY Contact Linear Technology for Potential Replacement
FEATURES n n n n n n n n
n
n n n n
Generates Full RS232 Signal Levels from 3V Supply 12V VPP Output Available for Flash Memory Useful with a Wide Variety of Switching Regulators Low Supply Current: I(VCC) = 1mA Wide Supply Range: 2V ≤ VCC ≤ 6V ESD Protection Over ±10kV Operates to 120k Baud Outputs Assume a High Impedance State When Off or Powered Down One µPower Receiver Remains Active While in SHUTDOWN Flowthrough Architecture Eases PC Board Layout 40µA Supply Current in SHUTDOWN Absolutely No Latch-Up Available in SO and SSOP Packages
The LT1332 is a 3-driver/5-receiver RS232 transceiver, designed to be used in conjunction with a switching regulator. The LT1332 shares the regulator’s positive output, while charge is capacitively pumped from the regulator’s switch pin to the negative supply. Schottky rectifiers built into the LT1332 simplify the charge pump design. The LT1332/LT1109A combination shown below generates fully compliant RS232 signal levels from as little as 2V of input supply. The switcher can deliver greater than 100mA of output current, making the LT1332 an excellent choice for mouse driver circuits. Advanced driver output stages operate up to 120k baud while driving heavy capacitive loads. New ESD structures on chip make the LT1332 resilient to multiple ±10kV strikes, eliminating costly transient suppressors.
APPLICATIONS n n
A shutdown pin disables the transceiver except for one receiver which remains active for detecting incoming RS232 signals. When shut down, the disabled drivers and receivers assume high impedance output states.
Notebook and Palmtop Computers Mouse Driver Circuits
TYPICAL APPLICATION LT1332 Powered from an LT1109A Micropower Switching Regulator Configured for Flash Memory STANDARD FLASH MEMORY VPP GENERATOR SWITCHER VIN 2 AA BATTERIES UP TO 6V
L1** 33µH
MBRS130T3
+ V+ 1
24
C– 2
23
3
22
LT1109A-12 SW SENSE ON/OFF
4
21
5
20
6
19
7
18
8
17
9
16
10
15
V IN
GND
22µF*
RS232 SIDE
PGND
* AVX TAJE226K035 ** SUMIDA CD54-330N (708-956-0666)
3V RS232 VCC
DRIVER INPUT
1µF
SW
22µF*
ON/OFF
12V VPP OUTPUT
Output Waveforms
NC
11 12
14 LT1332
13
V–
+
10µF
DRIVER OUTPUT RL = 3k CL = 2500pF
LOGIC SIDE
RECEIVER OUTPUT CL = 50pF
LT1332•TA02
RS232 ON/OFF
0.1µF LT1332 • TA01
1
LT1332 ABSOLUTE MAXIMUM RATINGS (Note 1)
Supply Voltage (VCC) ..................................................6V V + .........................................................................13.2V V – ...................................................................... – 13.2V C– ........................................................................... –15V Input Voltage Driver ........................................................... V + to V – Receiver ................................................. 30V to –30V Output Voltage Driver ..................................................... 30V to –30V Receiver ......................................–0.3V to VCC + 0.3V
Short Circuit Duration V + ....................................................................30 sec V – ....................................................................30 sec Driver Output .............................................. Indefinite Receiver Output .......................................... Indefinite Operating Temperature Range ..................... 0°C to 70°C Storage Temperature Range .................. –65°C to 150°C Lead Temperature (Soldering, 10 sec) ................. 300°C
PACKAGE/ORDER INFORMATION TOP VIEW
TOP VIEW 28 NC
NC 1
NC 2
27 NC
V+
V+ 3
26 V –
C– 3
NC 1
C– 4
S
25 GND
DRIVER OUT 4
24 DRIVER IN
DRIVER OUT 5
RX IN 5
23 RX OUT
RX IN 6
2
DRIVER OUT 6
TOP VIEW 28 NC
V+
1
24 V –
V–
C–
2
23 GND
DRIVER OUT
3
22 DRIVER IN
RX IN
4
21 RX OUT
DRIVER OUT
5
20 DRIVER IN
23 DRIVER IN
RX IN
6
19 RX OUT
27
26 GND 25 DRIVER IN 24 RX OUT
22 DRIVER IN
RX IN 7
22 RX OUT
RX IN
7
18 RX OUT
RX IN 8
21 RX OUT
RX IN 8
21 RX OUT
RX IN
8
17 RX OUT
RX IN 9
20 RX OUT
RX IN 9
20 RX OUT
DRIVER OUT
9
16 DRIVER IN
RX IN 10
19 RX OUT
DRIVER OUT 10
DRIVER OUT 7
DRIVER OUT 11
RXA IN 11
18 DRIVER IN
RXA IN 12
NC 12
17 RXA OUT
NC 13
16 RS232 ON/OFF
3V VCC 14
3V VCC 13 NC 14
15 GND G PACKAGE 28-LEAD SSOP
RXA IN 10
19 DRIVER IN
16 GND
TJMAX = 150°C, θJA = 80°C/W
N PACKAGE 28-LEAD PLASTIC DIP
OBSOLETE PACKAGE
OBSOLETE PACKAGE
ORDER PART NUMBER LT1332CG
ORDER PART NUMBER LT1332CN
13 GND
S PACKAGE 24-LEAD PLASTIC SOL
15 NC
TJMAX = 150°C, θJA = 56°C/W
14 RS232 ON/OFF
3V VCC 12
17 RS232 ON/OFF
TJMAX = 150°C, θJA = 96°C/W
15 RXA OUT
NC 11
18 RXA OUT
OBSOLETE PACKAGE
ORDER PART NUMBER LT1332CS
Consult factory for Industrial and Military grade parts.
ELECTRICAL CHARACTERISTICS PARAMETER
(Note 2)
CONDITIONS
MIN
TYP
MAX
UNITS
Power Supply Supply Current I(V +)
(Note 3)
0.3
0.8
mA
Supply Current I(V–)
(Note 3)
–0.6
–1.0
mA
Supply Current I(VCC)
(Note 3)
1.0
1.5
mA
Supply Current When OFF I(VCC)
(Note 4)
0.04 0.04
0.10 0.07
mA mA
Supply Current When OFF I(V+)
VCC = 3V, V+ = 8V, VON/OFF = 0.1V
0.10
0.20
mA
0.10
0.20
mA
Supply Current When OFF I(V –)
2
VCC
= 3V, V– = –8V, V
l
ON/OFF = 0.1V
LT1332 ELECTRICAL CHARACTERISTICS PARAMETER
(Note 2)
CONDITIONS
MIN
TYP
MAX
UNITS
0.7 0.6
0.3
V V
80
µA
–5.0
V V
Power Supply ON/OFF Pin Thresholds
Input Low Level (Device Shut Down) Input High Level (Device Enabled)
l l
1.3
0V ≤ VON/OFF ≤ 5V
l
–15
Positive Negative
l l
5.0
Input Low Level (VOUT = High) Input High Level (VOUT = Low)
l l
Logic Input Current
0.8V ≤ VIN ≤ 2.0V
l
Output Short-Circuit Current
VOUT = 0V
ON/OFF Pin Current Drivers Output Voltage Swing Logic Input Voltage Level
RL = 3k to GND
1.4 1.4
0.8
V V
5
20
µA
±17
Output Leakage Current
SHUTDOWN VOUT = ± 30V, VON/OFF = 0.1V
Driver Output ESD Rating
Human Body Model Discharge
Slew Rate
RL = 3k, CL = 51pF RL = 3k, CL = 2500pF
Propagation Delay
2.0
6.6 –7.0
10
l
mA 100
±10
µA kV
15 6
30
V/µs V/µs
0.6 0.5
1.3 1.3
µs µs
1.3 1.7
2.4
V V
0.1
0.4
1.0
V
3
5
7
4
Output Transition tPHL High to Low (Note 5) Output Transition tPLH Low to High
Receivers Input Voltage Thresholds
Input Low Threshold (VOUT = High) Input High Threshold (VOUT = Low)
0.8
Hysteresis
l
Input Resistance Receiver Input ESD Rating
Human Body Model Discharge
Output Voltage
Output Low, IOUT = – 500µA Output High, IOUT = 100µA (VCC = 3V)
l l
Output Leakage Current
SHUTDOWN (Note 6) 0 ≤ VOUT ≤ VCC
l
Output Short-Circuit Current
Sinking Current, VOUT = VCC Sourcing Current, VOUT = 0V
Propagation Delay
±10
2
Output Transition tHL High to Low (Note 7) Output Transition tLH Low to High
The l denotes specifications which apply over the full operating temperature range. Note 1: Absolute maximum ratings are those values beyond which the life of the device may be impaired. Note 2: Testing is done at VCC = 3V, V + = 8V, V – = –8V, and VON/OFF = 3V. Note 3: Supply current is measured with all driver inputs tied high. Note 4: Supply current measurements in SHUTDOWN are performed with VON/OFF = 0.1V, V + = 0V, V – = 0V.
2.7
kΩ kV
0.2 2.9
0.4
V V
1
10
µA
–4 4
–2
mA mA
1 0.6
3 3
µs µs
Note 5: For driver delay measurements, RL = 3k and CL = 51pF. Trigger points are set between the driver’s input logic threshold and the output transition to the zero crossing (t PHL = 1.4V to 0V and tPLH = 1.4V to 0V). Note 6: Receiver RXA (Pins 10 and 15, S Package) remains functioning in SHUTDOWN. Note 7: For receiver delay measurements, CL = 51pF. Trigger points are set between the receiver’s input logic threshold and the output transition to standard TTL/CMOS logic threshold (tLH = 1.3V to 2.4V and tHL = 1.7V to 0.8V).
3
LT1332 TYPICAL PERFORMANCE CHARACTERISTICS Unloaded Supply Current vs Temperature 1.4
14
1.0
SUPPLY CURRENT (mA)
I(V –) DRIVER OUTPUTS HIGH I(VCC)
0.8 I(V +)
0.6
DRIVER OUTPUTS LOW
0.4 0.2
RL = 3k CL = 2500pF ALL DRIVERS LOADED
12
75 50 25 TEMPERATURE (°C)
100
0
10
I(V +)
8 6 4
0
125
0.9
I(V –)
2
0 –50 –25
0
100 I(V –) = – 8V 75
I(VCC) = 3V
100
10 VOUT = 30V VOUT = –30V
1
0.1 –50
125
–25
25 75 0 50 TEMPERATURE (°C)
10 9 8 SR +
0
500
1000 1500 2000 CAPACITANCE (pF)
2500
3000
LT1332 • TPC07
4
ISC–
10 5
0
25 50 75 100 125 150 TEMPERATURE (°C)
Receiver Short-Circuit Current vs Temperature 30
4
V + = 8V V – = –8V VCC = 3V
INPUT LOW
2 0 –2 –4 –6
5 4
15
LT1332 • TPC06
SHORT-CIRCUIT CURRENT (mA)
DRIVER OUTPUT VOLTAGE (V)
SLEW RATE (V/µs)
12
6
ISC+ 20
0 –50 –25
125
8 6
11
7
100
25
Driver Output Voltage vs Temperature
RL = 3k
13
25 50 75 100 125 150 TEMPERATURE (°C)
LT1332 • TPC05
Slew Rate vs Load Capacitance SR –
0
30
LT1027 • TPC04
14
0.2
Driver Short-Circuit Current vs Temperature
25
15
0.3
LT1332 • TPC03
SHORT-CIRCUIT CURRENT (mA)
LEAKAGE CURRENT (µA)
I(V +) = 8V
50 25 75 0 TEMPERATURE (°C)
0.4
0 –50 –25
20 40 60 80 100 120 140 160 180 200 DATA RATE (k BAUD)
100
0 –50 –25
0.5
Driver Leakage in Shutdown vs Temperature
150
50
0.6
LT1332 • TPC02
Leakage Current in Shutdown vs Temperature
125
0.8 0.7
0.1
I(VCC)
LT1332•TPC01
LEAKAGE CURRENT (µA)
ON/OFF Threshold vs Temperature 1.0
THRESHOLD VOLTAGE (V)
16
1.2
SUPPLY CURRENT (mA)
Supply Current vs Data Rate
1.6
–8 – 50 – 25
25 20
ISC–
15 10 ISC+ 5
INPUT HIGH 0
25 50 75 100 125 150 TEMPERATURE (°C) LT1332 • TPC08
0 –50 –25
0
25 50 75 100 125 150 TEMPERATURE (°C) LT1332 • TPC09
LT1332 TYPICAL PERFORMANCE CHARACTERISTICS Receiver Input Thresholds vs Temperature
Receiver Input Thresholds vs Supply Voltage 5
Receiver Output Voltage vs Supply Voltage
2.5 SUPPLY VOLTAGE/RECEIVER OUTPUT (V)
0.6
RECEIVER INPUT THRESHOLD (V)
RECEIVER INPUT THRESHOLD (V)
VCC = 3V 4 VTH HIGH 3
2 VTH LOW 1
0 2.0
2.5
3.0 3.5 4.0 4.5 5.0 SUPPLY VOLTAGE (V)
5.5 6.0
2.0
VTH HIGH
1.5 VTH LOW 1.0
0.5
0 –50 –25
0
25 50 75 100 125 150 TEMPERATURE (°C)
LT1332 • TPC10
0.5
RECEIVER OUTPUT LOW SINKING 500µA
0.4
RECEIVER OUTPUT LOW SINKING 250µA
0.3 0.2 0.1 0 2.0
2.5
3.0 3.5 4.0 4.5 5.0 SUPPLY VOLTAGE (V)
LT1332 • TPC11
Receiver Output Waveforms
RECEIVER OUTPUT HIGH (VCC – VOUT) SOURCING
5.5
6.0
LT
Driver Output Waveforms INPUT 5V/DIV
INPUT 5V/DIV
DRIVER OUTPUT RL = 3k CL = 2500pF 10V/DIV RX OUTPUT CL = 50pF 2V/DIV
DRIVER OUTPUT RL = 3k 10V/DIV
LT1332•TPC13
LT1332•TPC13
PIN FUNCTIONS VCC: Input Supply Pin. VCC can vary from 2V to 6V to accommodate a wide range of logic levels, yet the system still responds correctly to RS232 signals. Supply current drops to 40µA in the SHUTDOWN mode. This pin should be decoupled with a 0.1µF ceramic capacitor.
V+: Positive Supply Input (RS232 Drivers). V + should be greater than 6.5V and less than 13.2V to assure valid RS232 output signals. An additional decoupling capacitor may be required if the V + generator is located far away from the LT1332.
GND: Ground Pins. Pins 13 and 23 (S Package) must both be grounded for proper operation.
V –: Negative Supply Pin (RS232 Drivers). This pin requires an external capacitor. When the device is powered from a switching regulator, the filter capacitor should be selected based on the maximum tolerable ripple for the specified minimum regulator on time. For some low frequency Burst Mode™ regulators, the filter capacitor should be relatively large (C ≥ 10µF). Low ESR tantalum capacitors
ON/OFF: Controls the operation mode of the device and is CMOS compatible. A logic low puts the device in the SHUTDOWN mode which reduces input supply current to 40µA and places all of the drivers and four of the receivers in a high impedance state. A logic high fully enables the device.
Burst Mode™ is a trademark of Linear Technology Corporation
5
LT1332 PIN FUNCTIONS work well in this application. When V– is powered from an external supply, the filter capacitor can be considerably smaller (C ≥ 0.1µF). Ceramic capacitors work well under these conditions. V– should be greater than –13.2V and less than – 6.5V.
the outputs are protected, short circuits on one output can load the power supply generator and may disrupt the signal levels of the other outputs. The driver outputs are protected against ESD to ±10kV for human body model discharges.
C –: Commutating Capacitor Input. When the LT1332 is used with a switching regulator, a charge pump capacitor should be connected from the regulator’s switch pin to the C– pin. Make the external capacitor 1µF or larger with low effective series resistance to maintain good charge pump efficiency. Low ESR tantalum capacitors (ESR < 2Ω) work well in this application. The C– pin should be left open when V– is powered from an external supply.
RX IN: Receiver Inputs. These pins accept RS232 level signals (± 5V to ±30V) into a protected 5k terminating resistor. The receiver inputs are protected against ESD to ±10kV for human body model discharges. Each receiver provides 0.4V of hysteresis for noise immunity. The receiver thresholds are specified at VCC = 3V. When VCC varies from 2V to 6V, the lower threshold increases about 3V. Regardless of these shifts, the device provides accurate data from valid RS232 input signals. A graph in the performance characteristics section shows typical changes in the thresholds. The active receiver (RXA, Pin 10, S Package) remains functional in SHUTDOWN.
DRIVER IN: RS232 Driver Input Pins. Inputs are TTL/ CMOS compatible, with threshold set to 1.2V. Unused inputs should not float; tie them to VCC. DRIVER OUT: Driver Outputs at RS232 Voltage Levels. Outputs are in a high impedance state when in SHUTDOWN mode, or VCC = 0V. Outputs are fully short-circuit protected from V– + 30V to V+ – 30V with the power on, off or SHUTDOWN. Typical breakdowns are ± 45V. Applying higher voltages will not damage the device if the overdrive is moderately current limited. Although
RX OUT: Receiver Outputs with TTL/CMOS Voltage Levels. Outputs are in a high impedance stage when in SHUTDOWN mode to allow data line sharing. Outputs are fully shortcircuit protected to ground or VCC with the power on, off or in SHUTDOWN mode. The active receiver (RXA, Pin 15, S Package) remains functional in SHUTDOWN.
ESD PROTECTION The RS232 line inputs of the LT1332 have on-chip protection from ESD transients up to ±10kV. The protection structures act to divert the static discharge safely to system ground. In order for the ESD protection to function effectively, the power supply and ground pins of the LT1332 must be connected to ground through low impedances. The power supply decoupling capacitors and charge pump storage capacitors provide this low impedance in normal applications of the circuit. The only constraint is that low ESR capacitors must be used for bypassing and charge storage. ESD testing must be done with pins VCC, V +, V– and GND shorted to ground or connected with low ESR capacitors.
6
ESD Test Circuit 12V 0.1µF
V+
1
24 V –
C–
2
23 GND
3
22
4
21
5
20
6
19
7
18
8
17
9
16
10
15
11
14
DRIVER OUT RX IN DRIVER OUT RS232 LINE PINS PROTECTED TO ±10kV
RX IN RX IN RX IN DRIVER OUT RXA IN
NC 3V VCC 12
3V 0.1µF
LT1332
13 LT1332 • TC
DRIVER IN RX OUT DRIVER IN RX OUT RX OUT RX OUT DRIVER IN RXA OUT RS232 ON/OFF GND
–12V 0.1µF
LT1332 APPLICATIONS INFORMATION Operation with a Switching Regulator
capacitors should be used in the charge pump to reduce voltage losses. The C – capacitor should be at least 1µF and the V– capacitor should be 5 to 10 times bigger. As a rule of thumb, make the V– capacitor at least 1/DCMIN times bigger than the C– capacitor where DCMIN is the regulator’s minimum duty cycle. Using large values for the V– capacitor reduces ripple on the V– supply.
The LT1332 is designed to be powered from an external switching regulator which may be used elsewhere for power conditioning. In a typical application, the LT1332 shares the regulator’s positive output, while charge is capacitively pumped from the regulator’s switch pin to the negative supply. Schottky rectifiers built into the LT1332 simplify the charge pump design. When used with a micropower switcher like the LT1109A, the Burst Mode™ operation of the charge pump resembles the switching characteristics of the LT1237 and similar devices.
Multiple Transceivers The circuit in Figure 1 demonstrates how the LT1332 may be used with different types of switching regulators. Four LT1332s are powered from a single PWM DC/DC converter using an LT1172. Even with all twelve drivers heavily loaded (RL = 3k, CL = 2500pF), the circuit generates fully compliant RS232 signals at 120k baud.
The V – supply is not directly regulated. The circuit relies on cross regulation and the regulator’s minimum duty cycle to control V–. Select the C– and V– storage capacitors so that when the regulator operates at minimum duty cycle, sufficient charge will transfer to the V– storage cap to maintain a voltage of at least –6.5V.
Operations with External Supplies When external RS232 supplies are available (6.5V ≤ V + ≤ 13.2V, –13.2V ≤ V– ≤ –6.2V) the LT1332 can be used as a stand-alone unit. Capacitor selection is
+ V+
+
LT1332 C–
3V VCC INPUT
LT1332 C–
ON/OFF 3V VCC GND
V+
V–
10µF 0.1µF
GND
LT1332 C–
GND
V+
V–
10µF 0.1µF
ON/OFF 3V VCC GND
0.1µF
1µF
1µF V+
V–
0.1µF
+
+ 1µF
+
1µF
+
+
LT1332 C–
GND
ON/OFF 3V VCC GND
0.1µF
V–
10µF 0.1µF
0.1µF
+
While only 0.1µF ceramic decoupling capacitors are needed on the positive supply inputs, low ESR tantalum
10µF
GND
ON/OFF 3V VCC GND 0.1µF
ON/OFF *L1 = SUMIDA CD105-101K OR COILCRAFT DO3316-104 **1% METAL FILM
2.7V < VIN < 5.5V I(VIN) < 14mA (UNLOADED) VIN
L1* 100µH
1N5817 8V
+ 68µF
+ 22µF
VSW
VIN
135k**
LT1172 FB VC
GND
25k**
1k
OPTIONAL SHUTDOWN VN2222LL
0.1µF
LT1332 • F01
Figure 1. Multiple LT1332s Powered from a Single LT1172 DC/DC Converter Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
7
LT1332 APPLICATIONS INFORMATION considerably simpler. Decouple V+ and V– with 0.1µF ceramic capacitors. Shutdown Control The LT1332 has an ON/OFF pin that controls the device’s mode of operation. With the ON/OFF pin high and the device operated unloaded, the LT1332 draws 1mA of supply current. With the ON/OFF pin low, the device
PACKAGE DESCRIPTION
enters micropower shutdown mode in which the current drawn from VCC drops to typically 40µA. If the power applied to V + and V– remains on in shutdown, there will be approximately 100µA of leakage from each supply. If these supplies drop to zero, leakage current also drops to zero. In shutdown mode one receiver remains active which may be useful for detecting start-up signals for the transceiver.
Dimensions in inches (millimeters) unless otherwise noted. G Package 28-Lead Plastic SSOP 0.397 – 0.407* (10.07 – 10.33)
0.205 – 0.212* (5.20 – 5.38)
0.068 – 0.078 (1.73 – 1.99)
28 27 26 25 24 23 22 21 20 19 18 17 16 15
0° – 8° 0.005 – 0.009 (0.13 – 0.22)
0.301 – 0.311 (7.65 – 7.90)
0.045 (1.14)
0.0256 (0.65) BSC
0.022 – 0.037 (0.55 – 0.95)
0.002 – 0.008 (0.05 – 0.21)
0.010 – 0.015 (0.25 – 0.38)
1 2 3 4 5 6 7 8 9 10 11 12 13 14
0.045 (1.14)
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.006 INCH (0.15mm).
N Package 28-Lead Plastic DIP 0.600 – 0.625 (15.240 – 15.875)
0.130 ± 0.005 (3.302 ± 0.127)
+0.025 0.625 –0.015
(
+0.635 15.87 –0.381
0.045 – 0.065 (1.143 – 1.651)
0.015 (0.381) MIN
0.009 – 0.015 (0.229 – 0.381)
0.035 – 0.080 (0.889 – 2.032)
0.018 ± 0.003 (0.457 ± 0.076)
0.100 ± 0.010 (2.540 ± 0.254)
0.010 – 0.029 × 45° (0.254 – 0.737)
27
26
25
24
23
22
21
20
19
18
17
16
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
S Package 24-Lead Plastic SOL
0.291 – 0.299 (7.391 – 7.595) (NOTE 2) 0.005 (0.127) RAD MIN
28
0.505 – 0.560 (12.827 – 14.224) 0.125 (3.175) MIN
)
1.455 (36.957) MAX
0.070 (1.778) TYP
0.037 – 0.045 (0.940 – 1.143)
0.093 – 0.104 (2.362 – 2.642)
24
23
22 21
0.598 – 0.614 (15.190 – 15.600) (NOTE 2) 20 19 18 17 16
15
14
13
0° – 8° TYP
0.009 – 0.013 (0.229 – 0.330)
NOTE 1 0.016 – 0.050 (0.406 – 1.270)
0.050 (1.270) TYP 0.014 – 0.019 (0.356 – 0.482)
NOTE: 1. PIN 1 IDENT, NOTCH ON TOP AND CAVITIES ON THE BOTTOM OF PACKAGES ARE THE MANUFACTURING OPTIONS. THE PART MAY BE SUPPLIED WITH OR WITHOUT ANY OF THE OPTIONS. 2. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.006 INCH (0.15mm).
8
Linear Technology Corporation
0.004 – 0.012 (0.102 – 0.305)
0.394 – 0.419 (10.007 – 10.643)
NOTE 1
1
2
3
4
5
6
7
8
9
10
11
12
LT 0211 REV B • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507
●
www.linear.com
LINEAR TECHNOLOGY CORPORATION 1993
