74ABT574ADB データシートの表示（PDF） - Philips Electronics

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74ABT574ADB

Octal D-type flip-flop (3-State)

Philips Electronics 

Philips Semiconductors

Octal D-type flip-flop (3-State)

Product specification

74ABT574A

FEATURES

• 74ABT574A is flow-through pinout version of 74ABT374

• Inputs and outputs on opposite side of package allow easy

interface to microprocessors

• 3-State outputs for bus interfacing

• Power-up 3-State

• Power-up reset

• Common output enable

• Latch-up protection exceeds 500mA per Jedec Std 17

• ESD protection exceeds 2000 V per MIL STD 883 Method 3015

and 200 V per Machine Model

• Live insertion/extraction permitted.

DESCRIPTION

The 74ABT574A high-performance BiCMOS device combines low

static and dynamic power dissipation with high speed and high

output drive.

The 74ABT574A is an 8-bit, edge triggered register coupled to eight

3-State output buffers. The two sections of the device are controlled

independently by the clock (CP) and Output Enable (OE) control

gates. The state of each D input (one set-up time before the

Low-to-High clock transition) is transferred to the corresponding

flip-flop’s Q output.

When OE is Low, the stored data appears at the outputs. When OE

is High, the outputs are in the High-impedance “off” state, which

means they will neither drive nor load the bus.

The 3-State output buffers are designed to drive heavily loaded

3-State buses, MOS memories, or MOS microprocessors. The

active-Low Output Enable (OE) controls all eight 3-State buffers

independent of the clock operation.

QUICK REFERENCE DATA

SYMBOL

PARAMETER

tPLH

tPHL

CIN

COUT

ICCZ

Propagation delay

CP to Qn

Input capacitance

Output capacitance

Total supply current

CONDITIONS

Tamb = 25°C; GND = 0V

CL = 50pF; VCC = 5V

VI = 0V or VCC

Outputs disabled; VO = 0V or VCC

Outputs disabled; VCC =5.5V

TYPICAL

3.0

3.4

3

6

100

UNIT

ns

pF

pF

µA

ORDERING INFORMATION

PACKAGES

20-Pin Plastic DIP

20-Pin plastic SO

20-Pin Plastic SSOP Type II

20-Pin Plastic TSSOP Type I

TEMPERATURE RANGE OUTSIDE NORTH AMERICA

–40°C to +85°C

74ABT574A N

–40°C to +85°C

74ABT574A D

–40°C to +85°C

74ABT574A DB

–40°C to +85°C

74ABT574A PW

NORTH AMERICA

74ABT574A N

74ABT574A D

74ABT574A DB

7ABT574APW DH

DWG NUMBER

SOT146-1

SOT163-1

SOT339-1

SOT360-1

PIN CONFIGURATION

OE 1

D0 2

D1 3

D2 4

D3 5

D4 6

D5 7

D6 8

D7 9

GND 10

20 VCC

19 Q0

18 Q1

17 Q2

16 Q3

15 Q4

14 Q5

13 Q6

12 Q7

11 CP

PIN DESCRIPTION

PIN

NUMBER

SYMBOL

FUNCTION

1

2, 3, 4, 5,

6, 7, 8, 9

19, 18, 17,

16, 15, 14,

13, 12

OE

D0-D7

Output enable input (active-Low)

Data inputs

Q0-Q7 Data outputs

11

CP Clock pulse input (active rising edge)

10

GND Ground (0V)

20

VCC Positive supply voltage

SA00103

1995 May 22

2

853-1509 15261

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