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PDF 74LS503 Data sheet ( Hoja de datos )
| Número de pieza | 74LS503 | |
| Descripción | 8-Bit Successive Approximation Register | |
| Fabricantes | Fairchild Semiconductor | |
| Logotipo |  |
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March 1989
Revised March 2000
DM74LS503
8-Bit Successive Approximation Register
(with Expansion Control)
General Description
The DM74LS503 register has an active LOW Enable (E)
input that is used in cascading two or more packages for
longer word lengths. A HIGH signal on E, after a START
operation, forces Q7 HIGH and prevents the device from
accepting serial data. With the E input of an DM74LS503
connected to the CC output of a preceding (more signifi-
cant) device, the DM74LS503 will be inhibited until the pre-
ceding device is filled, causing its CC output to go LOW.
This LOW signal then enables the DM74LS503 to accept
the serial data on subsequent clocks.
Features
■ Performs serial-to-parallel conversion
■ Expansion control for longer words
■ Storage and control for successive approximation A to D
conversion
■ Low power Schottky version of 2503
Ordering Code:
Order Number Package Number
Package Description
DM74LS503N
N16E
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Connection Diagram
Logic Symbol
VCC = Pin 16
GND = Pin 8
Pin Descriptions
Pin Names
D
S
CP
E
CC
Q0–Q7
Q7
Description
Serial Data Input
Start Input (Active LOW)
Clock Pulse Input (Active Rising Edge)
Conversion Enable Input (Active LOW)
Conversion Complete Output (Active LOW)
Parallel Register Outputs
Complement of Q7 Output
© 2000 Fairchild Semiconductor Corporation DS010190
www.fairchildsemi.com
1 page | ||
| Páginas | Total 4 Páginas | |
| PDF Descargar | [ Datasheet 74LS503.PDF ] | |
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