Philips 74hc hct7731 DATASHEETS

INTEGRATED CIRCUITS

DATA SH EET

For a complete data sheet, please also download:

•The IC06 74HC/HCT/HCU/HCMOS Logic Family Specifications

•The IC06 74HC/HCT/HCU/HCMOS Logic Package Information

•The IC06 74HC/HCT/HCU/HCMOS Logic Package Outlines

74HC/HCT7731

Quad 64-bit static shift register

Product specification
File under Integrated Circuits, IC06

September 1993

Philips Semiconductors Product specification

Quad 64-bit static shift register 74HC/HCT7731

FEATURES

• Frequency range DC to 100 MHz.

• Separate serial data inputs

• Cascadable

• Functionally compatible with

HEF 4731

• Includes recycling mode

• Direct shift out

• Output capability: Standard

• ICC category: LSI.

APPLICATIONS

• Data storage

• Delay line.

GENERAL DESCRIPTION

The HC/HCT7731 are high-speed
Si-gate CMOS devices. They are
specified in compliance with JEDEC
standard no. 7A.

The HC/HCT7731 are quad 64-bit
static shift registers with a recycling
mode. Each register has separate
data inputs D

to Dd, clock inputs CP

a

to CPd and data outputs Qa to Qd.
Data shifts one place towards the
output, each LOW to HIGH transition
of the clock pulse. Each recycling
mode input controls two registers
RECab for registers A and B and
RECcd for registers C and D. When
the REC input is HIGH, the device is
in the recycling mode and data at the
output is shifted back into the input of
the register, so after 64 clock pulses
the contents of a register is again in
its original position. This enables the
user to tap off data from any position.
When the REC input is LOW external
data can be shifted in.

QUICK REFERENCE DATA

GND = 0 V; T

= 25 °C; tr = tf = 6 ns.

amb

TYP.

SYMBOL PARAMETER CONDITIONS

HC HCT

t

PHL/tPLH

f

max

propagation delay

CP

to Q

a-d

a-d

maximum clock

CL = 15 pF;
VCC = 5 V

15 20 ns

100 100 MHz

frequency

C

I

C

PD

input capacitance 3.5 3.5 pF
power dissipation

capacitance per register

notes 1, 2
and 3

58 61 pF

Notes

1. C

is used to determine the dynamic power dissipation (PD in µW):

PD

PD = (CPD x V

2

x fi) + (CL + V

CC

CC

2

x fo) + (I

pull-up

x VCC)
where:
fi = input frequency in MHz.
fo = output frequency in MHz.
VCC = supply voltage in V.
CL = output load capacitance in pF.
I

= pull-up currents in µA.

pull-up

2. For HC the condition is VI = GND to V

CC

For HCT the condition is VI = GND to VCC− 1.5 V.

3. See also power dissipation information.

a

ORDERING INFORMATION

EXTENDED TYPE

NUMBER

PINS PIN POSITION MATERIAL CODE

PACKAGE

74HC/HCT7731N 16 DIL plastic SOT38Z
74HC/HCT7731D 16 SO16 plastic SOT109A

UNIT

September 1993 2

Philips Semiconductors Product specification

Quad 64-bit static shift register 74HC/HCT7731

PINNING

SYMBOL PIN DESCRIPTION

Q

to Q

a

d

CP

to CP

D

to D

a

REC

a

, REC

ab

d

d

cd

GND 8 ground (0 V)
V

CC

1, 7, 9, 15 data outputs
2, 6, 10, 14 clock inputs
3, 5, 11, 13 data inputs

4, 12 recycled enable input

16 positive supply

handbook, halfpage

REC

Q

CP

D

D

CP

Q

GND

1

a

2

a

3

a

4

ab

b
b
b

7731

5
6
7
8

MBA341

V

16

CC

Q

15

d

CP

14

d

D

13

d

12

REC

cd

D

11

c

CP

10

c

Q

9

c

handbook, full pagewidth

Fig.1 Pin configuration.

D

a

3

CP

a

2

REC

ab

4

D

5

b

CP

b

6

D

c

11

CP

c

10

REC

cd

12

D

13

d

CP

d

14

MUX

MUX

MUX

MUX

64 - BIT

STATIC SHIFT

REGISTER

64 - BIT

STATIC SHIFT

REGISTER

64 - BIT

STATIC SHIFT

REGISTER

64 - BIT

STATIC SHIFT

REGISTER

Q

a

1

Q

7

b

Q

9

c

Q

15

d

Fig.2 Functional diagram.

September 1993 3

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