74AC244_01 STMICROELECTRONICS [STMicroelectronics], 74AC244_01 Datasheet

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74AC244_01

Manufacturer Part Number
74AC244_01
Description
OCTAL BUS BUFFER WITH 3 STATE OUTPUTS (NON INVERTED)
Manufacturer
STMICROELECTRONICS [STMicroelectronics]
Datasheet
DESCRIPTION
The 74AC244 is an advanced high-speed CMOS
OCTAL BUS BUFFER (3-STATE) fabricated with
sub-micron silicon gate and double-layer metal
wiring C
The G input controls four BUS BUFFERs.
PIN CONNECTION AND IEC LOGIC SYMBOLS
April 2001
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
= 4 A(MAX.) at T
| = I
(OPR) = 2V to 6V
2
= V
MOS tecnology.
t
PHL
OL
NIL
= 24mA (MIN)
= 28 % V
PD
= 3.8ns (TYP.) at V
A
CC
=25°C
(MIN.)
WITH 3 STATE OUTPUTS (NON INVERTED)
CC
= 5V
ORDER CODES
This device is designed 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.
PACKAGE
TSSOP
SOP
DIP
DIP
OCTAL BUS BUFFER
74AC244M
74AC244B
TUBE
SOP
74AC244
74AC244MTR
74AC244TTR
TSSOP
T & R
1/9

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74AC244_01 Summary of contents

Page 1

WITH 3 STATE OUTPUTS (NON INVERTED) HIGH SPEED 3.8ns (TYP LOW POWER DISSIPATION A(MAX =25° HIGH NOISE IMMUNITY (MIN.) NIH NIL ...

Page 2

INPUT AND OUTPUT EQUIVALENT CIRCUIT TRUTH TABLE Don’t Care Z : High Impedance ABSOLUTE MAXIMUM RATINGS Symbol V Supply Voltage Input Voltage Output Voltage ...

Page 3

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

Page 4

AC ELECTRICAL CHARACTERISTICS (C Symbol Parameter Propagation Delay 3.3 PLH PHL Time 5 Output Enable 3.3 PZL PZH Time 5 Output Disable 3.3 PLZ PHZ Time 5.0 (*) Voltage range is 3.3V ...

Page 5

WAVEFORM 1: PROPAGATION DELAYS (f=1MHz; 50% duty cycle) WAVEFORM 2: OUTPUT ENABLE AND DISABLE TIME (f=1MHz; 50% duty cycle) 74AC244 5/9 ...

Page 6

Plastic DIP-20 (0.25) MECHANICAL DATA DIM. MIN. a1 0.254 B 1. 6/9 mm TYP. MAX. MIN. 0.010 1.65 0.055 0.45 0.25 25.4 8.5 2.54 22.86 7.1 3.93 3.3 1.34 ...

Page 7

SO-20 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

DIM. MIN 0.05 A2 0.85 b 0.19 c 0.09 D 6.4 E 6. PIN 1 IDENTIFICATION 1 8/9 TSSOP20 MECHANICAL DATA mm TYP. MAX. 1.1 ...

Page 9

Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. ...

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