hef4794b NXP Semiconductors, hef4794b Datasheet - Page 2

• Manufacturer Part Number: hef4794b
• Description: 8-stage Shift-and-store Register Led Driver
• Manufacturer: NXP Semiconductors

Philips Semiconductors
APPLICATIONS
GENERAL DESCRIPTION
The HEF4794B is an 8-stage serial shift register having a
storage latch associated with each stage for strobing data
from the serial input to parallel LED driver outputs
O
transitions. The data in each shift register stage is
ORDERING INFORMATION
FUNCTIONAL DIAGRAM
1999 Jun 30
HEF4794BT
HEF4794BP
0
Automotive
Industrial.
8-stage shift-and-store register LED driver
STR
TYPE NUMBER
to O
EO
CP
D 2
7
3
1
15
. Data is shifted on positive-going clock
V
16
V DD
8
SS
O 0 O 1 O 2 O 3 O 4 O 5 O 6 O 7
Fig.1 Functional diagram.
4
OPEN-DRAIN OUTPUTS
5
8-BIT STORAGE
8-STAGE SHIFT
6
HEF4794B
REGISTER
REGISTER
7
PINS
16
16
14
13
12
11
10
PIN POSITION
9
MBD909
O '
O
S
S
DIP16
SO16
2
transferred to the storage register when the strobe (STR)
input is HIGH. Data in the storage register appears at the
outputs whenever the output enable (EO) signal is HIGH.
Two serial outputs (O
cascading a number of HEF4794B devices. Data is
available at O
high-speed operation in cascaded systems in which the
clock rise time is fast. The same serial information is
available at O
provides cascading HEF4794B devices when the clock
rise time is slow.
LOGIC DIAGRAMS
handbook, halfpage
PACKAGES
CP
D
S
S
MATERIAL
' on the next negative-going clock edge and
on positive-going clock edges to allow
plastic
plastic
Fig.2 One D-latch.
S
and O
S
') are available for
Product specification
HEF4794B
MBD912
SOT109-1
SOT38-1
CODE
O