No Output Latch-Up at 20 V (After
Conducting 300 mA)
D
High-Speed Switching
D
Circuit Flexibility for Varied Applications
D
TTL-Compatible Diode-Clamped Inputs
D
Standard Supply Voltages
D
Plastic DIP (P) With Copper Lead Frame
Provides Cooler Operation and Improved
Reliability
D
Package Options Include Plastic
Small-Outline Packages, Ceramic Chip
Carriers, and Standard Plastic and Ceramic
300-mil DIPs
SUMMARY OF DEVICES
DEVICE
SN55451BANDFK, JG
SN55452BNANDJG
SN55453BORFK, JG
SN55454BNORJG
SN75451BANDD, P
SN75452BNANDD, P
SN75453BORD, P
SN75454BNORD, P
LOGIC OF
COMPLETE CIRCUIT
PACKAGES
SN55451B, SN55452B,
SN55453B, SN55454B . . . JG PACKAGE
SN75451B, SN75452B,
SN75453B, SN75454B ...D OR P PACKAGE
(TOP VIEW)
NC
8
7
6
5
CC
V
2Y
18
17
16
15
14
V
2B
2A
2Y
CC
NC
2B
NC
2A
NC
1A
1
1B
2
1Y
3
GND
SN55453B, SN55454B . . . FK PACKAGE
NC
1B
NC
1Y
NC
NC – No internal connection
4
SN55451B, SN55452B
(TOP VIEW)
NC1ANCNCNC
3 2 1 20 19
4
5
6
7
8
910111213
NC
GND
description
The SN55451B through SN55454B and SN75451B through SN75454B are dual peripheral drivers designed
for use in systems that employ TTL logic. This family is functionally interchangeable with and replaces the
SN75450 family and the SN75450A family devices manufactured previously . The speed of the devices is equal
to that of the SN75450 family, and the parts are designed to ensure freedom from latch-up. Diode-clamped
inputs simplify circuit design. Typical applications include high-speed logic buf fers, power drivers, relay drivers,
lamp drivers, MOS drivers, line drivers, and memory drivers.
The SN55451B/SN75451B, SN55452B/SN75452B, SN55453B/SN75453B, and SN55454B/SN75454B are
dual peripheral AND, NAND, OR, and NOR drivers, respectively (assuming positive logic), with the output of
the logic gates internally connected to the bases of the npn output transistors.
The SN55’ drivers are characterized for operation over the full military range of –55°C to 125°C. The SN75’
drivers are characterized for operation from 0°C to 70°C.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
SN55’SN75’UNIT
Supply voltage, VCC (see Note 1)77V
Input voltage, V
Inter-emitter voltage (see Note 2)5.55.5V
Off-state output voltage, V
Continuous collector or output current, IOK (see Note 3)400400mA
Peak collector or output current, II (tw ≤ 10 ms, duty cycle ≤ 50%, see Note 4)500500mA
Continuous total power dissipationSee Dissipation Rating Table
Operating free-air temperature range, T
Storage temperature range, T
Case temperature for 60 secondsFK package260°C
Lead temperature 1,6 mm (1/16 inch) from case for 60 secondsJG package300°C
Lead temperature 1,6 mm (1/16 inch) from case for 10 secondsD or P package260°C
NOTES: 1. Voltage values are with respect to network GND, unless otherwise specified.
I
O
A
stg
2. This is the voltage between two emitters of a multiple-emitter transistor.
3. This value applies when the base-emitter resistance (RBE) is equal to or less than 500 Ω.
4. Both halves of these dual circuits may conduct rated current simultaneously; however , power dissipation averaged over a short time
interval must fall within the continuous dissipation rating.
5.55.5V
3030V
–55 to 1250 to 70°C
–65 to 150 –65 to 150°C
T
≤ 25°CDERATING FACTORT
POWER RATINGABOVE TA = 25°CAPOWER RATINGAPOWER RATING