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HEF4894B डेटा पत्रक PDF( Datasheet डाउनलोड )


डेटा पत्रक - 12-stage shift-and-store register LED driver - Philips

भाग संख्या HEF4894B
समारोह 12-stage shift-and-store register LED driver
मैन्युफैक्चरर्स Philips 
लोगो Philips लोगो 
पूर्व दर्शन
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<?=HEF4894B?> डेटा पत्रक पीडीएफ

HEF4894B pdf
Philips Semiconductors
12-stage shift-and-store register LED driver
Product specification
HEF4894B
APPLICATIONS
Automotive
Industrial
GENERAL DESCRIPTION
The HEF4894B is a 12 stage serial
shift register having a storage latch
associated with each stage for
strobing data from the serial input to
parallel LED driver outputs O0 to
O11. Data is shifted on positive-going
clock transitions. The data in each
shift register stage is 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 (Os and Os’) are
available for cascading a number of
HEF4894B devices. Data is available
at Os on positive-going clock edges to
allow high-speed operation in
cascaded systems in which the clock
rise time is fast. The same serial
information is available at Os’ on the
next negative-going clock edge and
provides cascading HEF4894B
devices when the clock rise time is
slow.
ORDERING AND PACKAGE INFORMATION
TYPE
NUMBER
HEF4894BT
HEF4894BP
PINS
20
20
PACKAGES
PIN POSITION MATERIAL
SO plastic
DIL plastic
CODE
SO20/SOT163A
DIL20/SOT146
PINNING
PIN SYMBOL
1 STR
2D
3 CP
4, 5, 6, 7, 8, 9, 18, O0 to O11
17, 16, 15, 14, 13
10
11, 12
19
Vss
Os, Os
EO
20 VDD
NAME AND FUNCTION
strobe input
data input
clock input
parallel outputs (open drain)
ground
serial outputs
output enable input
positive supply voltage
FAMILY DATA
See Family Specifications except for:
Rating for DC current into any open-drain output: 40 mA.
IDD LIMITS category MSI: see Family Specifications.
Preliminary pin assignment.
Fig.1 Pinning diagram.
January 1995
Fig.2 Functional diagram.
2

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