74VHCT574ATTR datasheet(1/13 Pages) STMICROELECTRONICS

Il numero della parte	74VHCT574ATTR

Spiegazioni elettronici	OCTAL D-TYPE FLIP FLOP WITH 3 STATE OUTPUTS NON INVERTING

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December 2004

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HIGH SPEED:

fMAX = 180 MHz (TYP.) at VCC = 5V

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LOW POWER DISSIPATION:

ICC = 4 µA (MAX.) at TA=25°C

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COMPATIBLE WITH TTL OUTPUTS:

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

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POWER DOWN PROTECTION ON INPUTS

& OUTPUTS

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SYMMETRICAL OUTPUT IMPEDANCE:

|IOH| = IOL = 8 mA (MIN)

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BALANCED PROPAGATION DELAYS:

tPLH ≅ tPHL

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OPERATING VOLTAGE RANGE:

VCC(OPR) = 4.5V to 5.5V

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PIN AND FUNCTION COMPATIBLE WITH

74 SERIES 574

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IMPROVED LATCH-UP IMMUNITY

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LOW NOISE: VOLP = 0.9V (MAX.)

DESCRIPTION

The 74VHCT574A 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 flip-flop is 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 states that were

setup at the D inputs.

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

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

when (OE) is high, the outputs will be in a high

impedance state.

The Output control does not affect the internal

operation of flip flop; 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 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.

74VHCT574A

OCTAL D-TYPE FLIP FLOP

WITH 3 STATE OUTPUTS NON INVERTING

Figure 1: Pin Connection And IEC Logic Symbols

Table 1: Order Codes

PACKAGE

T & R

SOP

74VHCT574AMTR

TSSOP

74VHCT574ATTR

TSSOP

SOP

Rev. 4

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