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參數資料
| 型號： | 935074480112 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 顯示驅動器 |
| 英文描述： | LED DISPLAY DRIVER, PDIP16 |
| 封裝： | 0.300 INCH, PLASTIC, MO-001AE, SOT-38-1, DIP-16 |
| 文件頁數： | 9/16頁 |
| 文件大?。?/td> | 78K |
| 代理商： | 935074480112 |
1999 Jun 30
2
Philips Semiconductors
Product specication
8-stage shift-and-store register LED driver
HEF4794B
APPLICATIONS
Automotive
Industrial.
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
O0 to O7. 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 HEF4794B 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 HEF4794B devices when the clock
rise time is slow.
ORDERING INFORMATION
TYPE NUMBER
PACKAGES
PINS
PIN POSITION
MATERIAL
CODE
HEF4794BT
16
SO16
plastic
SOT109-1
HEF4794BP
16
DIP16
plastic
SOT38-1
FUNCTIONAL DIAGRAM
Fig.1 Functional diagram.
MBD909
4
8
5
6
7
14
13
12
11
15
OPEN-DRAIN OUTPUTS
1
3
EO
STR
CP
D2
16
VDD
O0 O1 O2 O3 O4 O5 O6 O7
V
SS
O '
10
S
O
9
S
HEF4794B
8-BIT STORAGE
REGISTER
8-STAGE SHIFT
REGISTER
LOGIC DIAGRAMS
Fig.2 One D-latch.
handbook, halfpage
MBD912
D
CP
O
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