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Philips

HEF4557B Datasheet Preview

HEF4557B Datasheet

1-to-64 bit variable length shift register

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INTEGRATED CIRCUITS
DATA SHEET
For a complete data sheet, please also download:
The IC04 LOCMOS HE4000B Logic
Family Specifications HEF, HEC
The IC04 LOCMOS HE4000B Logic
Package Outlines/Information HEF, HEC
HEF4557B
LSI
1-to-64 bit variable length shift
register
Product specification
File under Integrated Circuits, IC04
January 1995




Philips

HEF4557B Datasheet Preview

HEF4557B Datasheet

1-to-64 bit variable length shift register

No Preview Available !

Philips Semiconductors
1-to-64 bit variable length shift register
Product specification
HEF4557B
LSI
DESCRIPTION
The HEF4557B is a static clocked serial shift register
whose length may be programmed to be any number of
bits between 1 and 64. The number of bits selected is
equal to the sum of the subscripts of the enabled length
control inputs (L1, L2, L4, L8, L16 and L32) plus one. Serial
data may be selected from the DA or DB data inputs with
the A/B select input. This feature is useful for recirculation
purposes. Information on DA or DB is shifted into the first
register position and all the data in the register is shifted
one position to the right on the LOW to HIGH transition of
CP0 while CP1 is LOW or on the HIGH to LOW transition
of CP1 while CP0 is HIGH. A HIGH on master reset (MR)
resets the register and forces O to LOW and O to HIGH,
independent of the other inputs.
PINNING
DA, DB
A/B
CP0
CP1
MR
L1 to L32
O, O
Fig.1 Functional diagram.
data inputs
select data input
clock input
clock enable input
asynchronous master reset
bit-length control inputs
buffered outputs
HEF4557BP(N): 16-lead DIL; plastic
(SOT38-1)
HEF4557BD(F): 16-lead DIL; ceramic (cerdip)
(SOT74)
HEF4557BT(D): 16-lead SO; plastic
(SOT109-1)
( ): Package Designator North America
FAMILY DATA, IDD LIMITS category LSI
See Family Specifications
Fig.2 Pinning diagram.
January 1995
2


Part Number HEF4557B
Description 1-to-64 bit variable length shift register
Maker Philips
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HEF4557B Datasheet PDF






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