74VHCT244A datasheet(1/12 Pages) STMICROELECTRONICS

Part #	74VHCT244A

Description	OCTAL BUS BUFFER WITH 3 STATE OUTPUTS (NON INVERTED)

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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December 2004

s

HIGH SPEED: tPD = 5.4 ns (TYP.) at VCC = 5V

s

LOW POWER DISSIPATION:

ICC = 4 µA (MAX.) at TA=25°C

s

COMPATIBLE WITH TTL OUTPUTS:

VIH = 2V (MIN.), VIL = 0.8V (MAX)

s

POWER DOWN PROTECTION ON INPUTS

& OUTPUTS

s

SYMMETRICAL OUTPUT IMPEDANCE:

|IOH| = IOL = 8 mA (MIN)

s

BALANCED PROPAGATION DELAYS:

tPLH ≅ tPHL

s

OPERATING VOLTAGE RANGE:

VCC(OPR) = 4.5V to 5.5V

s

PIN AND FUNCTION COMPATIBLE WITH

74 SERIES 244

s

IMPROVED LATCH-UP IMMUNITY

s

LOW NOISE: VOLP = 0.9V (MAX.)

DESCRIPTION

The 74VHCT244A is an advanced high-speed

CMOS

OCTAL

BUS

BUFFER

(3-STATE)

fabricated

with

sub-micron silicon gate and

double-layer metal wiring C2MOS technology.

G enable input governs four BUS BUFFERs.

This device is designed to be used with 3 state

memory address drivers, etc.

Power down protection is provided on all inputs

and outputs and 0 to 7V can be accepted on

inputs with no regard to the supply voltage. This

device can be used to interface 5V to 3V since all

inputs are equipped with TTL threshold.

All

inputs

and

outputs

are

equipped

with

protection circuits against static discharge, giving

them 2KV ESD immunity and transient excess

voltage.

74VHCT244A

OCTAL BUS BUFFER

WITH 3 STATE OUTPUTS (NON INVERTED)

Figure 1: Pin Connection And IEC Logic Symbols

Table 1: Order Codes

PACKAGE

T & R

SOP

74VHCT244AMTR

TSSOP

74VHCT244ATTR

TSSOP

SOP

Rev. 4

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