74AC244M STMICROELECTRONICS [STMicroelectronics], 74AC244M Datasheet

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74AC244M

Manufacturer Part Number
74AC244M
Description
OCTAL BUS BUFFER WITH 3 STATE OUTPUTS NON INVERTED
Manufacturer
STMICROELECTRONICS [STMicroelectronics]
Datasheet

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DESCRIPTION
The AC244 is an advanced CMOS OCTAL BUS
BUFFER (3-STATE) fabricated with sub-micron
silicon gate and double-layer metal wiring C
technology. It is ideal for low power applications
PIN CONNECTION AND IEC LOGIC SYMBOLS
April 1997
HIGH SPEED: t
LOW POWER DISSIPATION:
I
HIGH NOISE IMMUNITY:
V
50 TRANSMISSION LINE DRIVING
CAPABILITY
SYMMETRICAL OUTPUT IMPEDANCE:
|I
BALANCED PROPAGATION DELAYS:
t
OPERATING VOLTAGE RANGE:
V
PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 244
IMPROVED LATCH-UP IMMUNITY
CC
PLH
OH
NIH
CC
= 8 A (MAX.) at T
| = I
(OPR) = 2V to 6V
= V
t
PHL
OL
NIL
= 24 mA (MIN)
= 28% V
PD
= 4 ns (TYP.) at V
CC
WITH 3 STATE OUTPUTS (NON INVERTED)
A
(MIN.)
= 25
o
C
CC
= 5V
2
MOS
mantaining high speed operation similar to
equivalent Bipolar Schottky TTL.
G control output governs four BUS BUFFERs.
This device is desibned to be used with 3 state
memory address drivers, etc.
All inputs and outputs are equipped with
protection circuits against static discharge, giving
them 2KV ESD immunity and transient excess
voltage.
(Plastic Package)
74AC244B
OCTAL BUS BUFFER
B
ORDER CODES :
(Micro Package)
74AC244M
74AC244
M
1/8

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74AC244M Summary of contents

Page 1

... G control output governs four BUS BUFFERs. This device is desibned to be used with 3 state memory address drivers, etc. All inputs and outputs are equipped with protection circuits against static discharge, giving them 2KV ESD immunity and transient excess voltage. 2 MOS 74AC244 M (Micro Package) 74AC244M 1/8 ...

Page 2

INPUT AND OUTPUT EQUIVALENT CIRCUIT TRUTH TABLE INPUT ”H” or ”L” Z: High impedance ABSOLUTE MAXIMUM RATINGS Symbol Parameter V Supply Voltage Input Voltage Output Voltage O I ...

Page 3

DC SPECIFICATIONS Symbol Parameter V High Level Input Voltage IH V Low Level Input Voltage IL V High Level Output OH Voltage V Low Level Output OL Voltage I Input Leakage Current State Output Leakage OZ Current ...

Page 4

AC ELECTRICAL CHARACTERISTICS (C Symbol Parameter t Propagation Delay Time PLH t PHL t Output Enable Time PZL t PZH t Output Disable Time PLZ t PHZ (*) Voltage range is 3.3V 0.3V (**) Voltage range is 5V 0.5V ...

Page 5

WAVEFORM 1: PROPAGATION DELAYS (f=1MHz; 50% duty cycle) WAVEFORM 2: OUTPUT ENABLE AND DISABLE TIME (f=1MHz; 50% duty cycle) 74AC244 5/8 ...

Page 6

Plastic DIP20 (0.25) MECHANICAL DATA DIM. MIN. TYP. a1 0.254 B 1.39 b 0. 2.54 e3 22. 6/8 mm MAX. MIN. 0.010 1.65 0.055 25.4 8.5 7.1 3.93 3.3 1.34 ...

Page 7

SO20 MECHANICAL DATA mm DIM. MIN. TYP 0. 0.35 b1 0. 12.60 E 10.00 e 1.27 e3 11.43 F 7. inch MAX. MIN. TYP. 2.65 0.20 0.004 2.45 ...

Page 8

Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsabilit y for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may results ...

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