LINER LT1332CG

LT1332
Wide Supply Range
Low Power RS232 Transceiver with
12V VPP Output for Flash Memory
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DESCRIPTIO
FEATURES
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
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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.
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APPLICATI
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■
S
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
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TYPICAL APPLICATI
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
DRIVER
INPUT
1µF
SW
22µF*
ON/OFF
12V VPP
OUTPUT
Output Waveforms
* AVX TAJE226K035
** SUMIDA CD54-330N (708-956-0666)
V–
+
10µF
DRIVER
OUTPUT
RL = 3k
CL = 2500pF
LOGIC
SIDE
RECEIVER
OUTPUT
CL = 50pF
LT1332 • TA02
3V
RS232
VCC
NC
11
12
14
LT1332
13
RS232
ON/OFF
0.1µF
LT1332 • TA01
1
LT1332
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ABSOLUTE
RATI GS
(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
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PACKAGE/ORDER I FOR ATIO
TOP VIEW
TOP VIEW
NC 1
28 NC
NC 2
27 NC
V+ 3
26 V –
C– 4
25 GND
27 V –
V+
1
24 V –
26 GND
C–
2
23 GND
DRIVER OUT
3
22 DRIVER IN
RX IN
4
21 RX OUT
DRIVER OUT
5
20 DRIVER IN
3
DRIVER OUT 4
RX IN 5
23 RX OUT
RX IN 6
28 NC
V+ 2
C–
24 DRIVER IN
DRIVER OUT 5
TOP VIEW
NC 1
DRIVER OUT 6
25 DRIVER IN
24 RX OUT
23 DRIVER IN
22 DRIVER IN
RX IN 7
22 RX OUT
RX IN
6
19 RX OUT
RX IN 8
21 RX OUT
RX IN 8
21 RX OUT
RX IN
7
18 RX OUT
RX IN 9
20 RX OUT
RX IN 9
20 RX OUT
RX IN
8
17 RX OUT
RX IN 10
19 RX OUT
DRIVER OUT 10
DRIVER OUT
9
16 DRIVER IN
DRIVER OUT 7
RXA IN 11
18 DRIVER IN
DRIVER OUT 11
NC 12
17 RXA OUT
RXA IN 12
3V VCC 13
16 RS232 ON/OFF
NC 13
NC 14
15 GND
3V VCC 14
19 DRIVER IN
18 RXA OUT
RXA IN 10
17 RS232 ON/OFF
16 GND
15 NC
ORDER PART NUMBER
LT1332CG
13 GND
S PACKAGE
24-LEAD PLASTIC SOL
TJMAX = 150°C, θJA = 80°C/W
TJMAX = 150°C, θJA = 56°C/W
TJMAX = 150°C, θJA = 96°C/W
14 RS232 ON/OFF
3V VCC 12
N PACKAGE
28-LEAD PLASTIC DIP
G PACKAGE
28-LEAD SSOP
15 RXA OUT
NC 11
ORDER PART NUMBER
LT1332CN
ORDER PART NUMBER
LT1332CS
Consult factory for Industrial and Military grade parts.
ELECTRICAL CHARACTERISTICS
(Note 2)
PARAMETER
Power Supply
Supply Current I(V +)
Supply Current I(V –)
Supply Current I(VCC)
Supply Current When OFF I(VCC)
CONDITIONS
Supply Current When OFF I(V +)
Supply Current When OFF I(V –)
VCC = 3V, V + = 8V, VON/OFF = 0.1V
VCC = 3V, V – = – 8V, VON/OFF = 0.1V
2
(Note 3)
(Note 3)
(Note 3)
(Note 4)
MIN
●
TYP
MAX
UNITS
0.3
– 0.6
1.0
0.04
0.04
0.10
0.10
0.8
–1.0
1.5
0.10
0.07
0.20
0.20
mA
mA
mA
mA
mA
mA
mA
LT1332
ELECTRICAL CHARACTERISTICS
PARAMETER
Power Supply
ON/OFF Pin Thresholds
ON/OFF Pin Current
Drivers
Output Voltage Swing
Logic Input Voltage Level
Logic Input Current
Output Short-Circuit Current
Output Leakage Current
Driver Output ESD Rating
Slew Rate
Propagation Delay
Receivers
Input Voltage Thresholds
Hysteresis
Input Resistance
Receiver Input ESD Rating
Output Voltage
Output Leakage Current
Output Short-Circuit Current
Propagation Delay
(Note 2)
CONDITIONS
MIN
Input Low Level (Device Shut Down)
Input High Level (Device Enabled)
0V ≤ VON/OFF ≤ 5V
●
●
RL = 3k to GND
●
●
Positive
Negative
Input Low Level (VOUT = High)
Input High Level (VOUT = Low)
0.8V ≤ VIN ≤ 2.0V
VOUT = 0V
SHUTDOWN VOUT = ±30V, VON/OFF = 0.1V
Human Body Model Discharge
RL = 3k, CL = 51pF
RL = 3k, CL = 2500pF
Output Transition t PHL High to Low (Note 5)
Output Transition t PLH Low to High
●
●
●
2.0
●
4
0.8
●
The ● 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.
5.0
●
Input Low Threshold (VOUT = High)
Input High Threshold (VOUT = Low)
Human Body Model Discharge
Output Low, IOUT = – 500µA
Output High, IOUT = 100µA (VCC = 3V)
SHUTDOWN (Note 6) 0 ≤ VOUT ≤ VCC
Sinking Current, VOUT = VCC
Sourcing Current, VOUT = 0V
Output Transition tHL High to Low (Note 7)
Output Transition tLH Low to High
1.3
–15
●
●
0.1
3
2.7
●
2
TYP
MAX
0.7
0.6
0.3
80
6.6
– 7.0
1.4
1.4
5
±17
10
±10
15
6
0.6
0.5
1.3
1.7
0.4
5
±10
0.2
2.9
1
–4
4
1
0.6
– 5.0
0.8
20
100
30
1.3
1.3
2.4
1.0
7
0.4
10
–2
3
3
UNITS
V
V
µA
V
V
V
V
µA
mA
µA
kV
V/µs
V/µs
µs
µs
V
V
V
kΩ
kV
V
V
µA
mA
mA
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 (tPHL = 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).
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LT1332
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TYPICAL PERFOR A CE CHARACTERISTICS
Supply Current vs Data Rate
1.4
14
1.2
I(V –)
DRIVER OUTPUTS HIGH
1.0
I(VCC)
0.8
+
I(V )
DRIVER OUTPUTS LOW
0.6
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
50
I(VCC) = 3V
100
10
VOUT = 30V
VOUT = –30V
1
0.1
–50
125
0
50
25
75
TEMPERATURE (°C)
–25
10
9
8
SR +
4
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
0
15
LT1332 • TPC06
SHORT-CIRCUIT CURRENT (mA)
6
DRIVER OUTPUT VOLTAGE (V)
SLEW RATE (V/µs)
–
11
6
ISC+
20
0
–50 –25
125
8
RL = 3k
7
100
25
Driver Output Voltage
vs Temperature
12
25 50 75 100 125 150
TEMPERATURE (°C)
LT1332 • TPC05
Slew Rate vs Load Capacitance
SR
0
30
LT1027 • TPC04
13
0.2
Driver Short-Circuit Current
vs Temperature
25
14
0.3
LT1332 • TPC03
SHORT-CIRCUIT CURRENT (mA)
LEAKAGE CURRENT (µA)
I(V +) = 8V
15
0.4
0
–50 –25
20 40 60 80 100 120 140 160 180 200
DATA RATE (k BAUD)
100
50
25
75
0
TEMPERATURE (˚C)
0.5
Driver Leakage in Shutdown
vs Temperature
150
0
–50 –25
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)
1.6
16
SUPPLY CURRENT (mA)
SUPPLY CURRENT (mA)
Unloaded Supply Current
vs Temperature
–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
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TYPICAL PERFOR A CE CHARACTERISTICS
Receiver Input Thresholds
vs Temperature
Receiver Input Thresholds
vs Supply Voltage
5
Receiver Output Voltage
vs Supply Voltage
0.6
SUPPLY VOLTAGE/RECEIVER OUTPUT (V)
2.5
RECEIVER INPUT THRESHOLD (V)
RECEIVER INPUT THRESHOLD (V)
VCC = 3V
4
VTH HIGH
3
2
VTH LOW
1
0
2.0
3.0 3.5 4.0 4.5 5.0
SUPPLY VOLTAGE (V)
2.5
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
LT1332 • TPC12
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
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PI FU CTIO S
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 ModeTM regulators, the filter capacitor
should be relatively large (C ≥ 10µF). Low ESR tantalum
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.
6.0
Burst ModeTM is a trademark of Linear Technology Corporation
5
LT1332
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PI FU CTIO S
capacitors 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.
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.
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
the outputs are protected, short circuits on one output
ESD PROTECTIO
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.
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 short-circuit 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.
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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
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.
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
NC
3V VCC 12
14
DRIVER OUT
RX IN
DRIVER OUT
RS232
LINE PINS
PROTECTED
TO ±10kV
RX IN
RX IN
RX IN
DRIVER OUT
RXA IN
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
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APPLICATIO S I FOR ATIO
Operation with a Switching Regulator
tors 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 ModeTM
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 consider-
+
V+
V–
+
LT1332
C–
3V VCC
INPUT
V–
10µF 0.1µF
LT1332
C–
GND
ON/OFF
3V VCC GND
V+
V–
10µF 0.1µF
LT1332
C–
GND
ON/OFF
3V VCC GND
0.1µF
1µF
1µF
V+
0.1µF
+
+
1µF
+
1µF
V+
+
+
10µF
LT1332
C–
GND
ON/OFF
3V VCC GND
0.1µF
0.1µF
V–
0.1µF
+
While only 0.1µF ceramic decoupling capacitors are needed
on the positive supply inputs, low ESR tantalum capaci-
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
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APPLICATIO S I FOR ATIO
ably 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 DESCRIPTIO
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.
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Dimensions in inches (millimeters) unless otherwise noted.
G Package
28-Lead Plastic SSOP
0.205 – 0.212*
(5.20 – 5.38)
0.397 – 0.407*
(10.07 – 10.33)
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)
0.015
(0.381)
MIN
0.009 – 0.015
(0.229 – 0.381)
(
+0.025
0.625 –0.015
+0.635
15.87
–0.381
0.035 – 0.080
(0.889 – 2.032)
0.010 – 0.029 × 45°
(0.254 – 0.737)
0.018 ± 0.003
(0.457 ± 0.076)
0.100 ± 0.010
(2.540 ± 0.254)
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
0.045 – 0.065
(1.143 – 1.651)
0.093 – 0.104
(2.362 – 2.642)
0.037 – 0.045
(0.940 – 1.143)
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/GP 1193 10K REV 0 • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7487
(408) 432-1900 ● FAX: (408) 434-0507 ● TELEX: 499-3977
 LINEAR TECHNOLOGY CORPORATION 1993