74VHC374 View Datasheet(PDF) - STMicroelectronics

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74VHC374

Octal Bidirectional Transceiver with 3-STATE Outputs

STMicroelectronics 

74VHC374

OCTAL D-TYPE FLIP FLOP

WITH 3 STATE OUTPUTS NON INVERTING

s HIGH SPEED:

fMAX = 270 MHz (TYP.) at VCC = 5V

s LOW POWER DISSIPATION:

ICC = 4 µA (MAX.) at TA=25°C

s HIGH NOISE IMMUNITY:

VNIH = VNIL = 28% VCC (MIN.)

s POWER DOWN PROTECTION ON INPUTS

s SYMMETRICAL OUTPUT IMPEDANCE:

|IOH| = IOL = 8 mA (MIN)

s BALANCED PROPAGATION DELAYS:

tPLH ≅ tPHL

s OPERATING VOLTAGE RANGE:

VCC(OPR) = 2V to 5.5V

s PIN AND FUNCTION COMPATIBLE WITH

74 SERIES 374

s IMPROVED LATCH-UP IMMUNITY

s LOW NOISE: VOLP = 0.9V (MAX.)

DESCRIPTION

The 74VHC374 is an advanced high-speed

CMOS OCTAL D-TYPE FLIP FLOP with 3 STATE

OUTPUTS NON INVERTING fabricated with

sub-micron silicon gate and double-layer metal

wiring C2MOS technology.

These 8 bit D-Type latch are controlled by a clock

input (CK) and an output enable input (OE).

On the positive transition of the clock, the Q

outputs will be set to the logic state that were

setup at the D inputs.

SOP

TSSOP

Table 1: Order Codes

PACKAGE

SOP

TSSOP

T&R

74VHC374MTR

74VHC374TTR

While the (OE) input is low, the 8 outputs will be in

a normal logic state (high or low logic level) and

while high level the outputs will be in a high

impedance state.

The Output control does not affect the internal

operation of flip flops; that is, the old data can be

retained or the new data can be entered even

while the outputs are off. Power down protection is

provided on all inputs 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.

All inputs and outputs are equipped with

protection circuits against static discharge, giving

them 2KV ESD immunity and transient excess

voltage.

Figure 1: Pin Connection And IEC Logic Symbols

November 2004

Rev. 4

1/14

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