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PDF DM54LS503 Data sheet ( Hoja de datos )
| Número de pieza | DM54LS503 | |
| Descripción | 8-Bit Successive Approximation Register | |
| Fabricantes | National Semiconductor | |
| Logotipo |  |
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April 1992
DM54LS503 DM74LS503
8-Bit Successive Approximation
Register (with Expansion Control)
General Description
The ’LS503 register is basically the same as the ’LS502
except that it 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 ’LS503 connected to the
CC output of a preceding (more significant) device the
’LS503 will be inhibited until the preceding device is filled
causing its CC output to go LOW This LOW signal then
enables the ’LS503 to accept the serial data on subsequent
clocks For a description of the starting shifting and conver-
sion operations please see the ’LS502 data sheet
Features
Y Performs serial-to-parallel conversion
Y Expansion control for longer words
Y Storage and control for successive approximation
A to D conversion
Y Low power Schottky version of 2503
Connection Diagram
Logic Symbol
Dual-In-Line Package
TL F 10190 – 1
Order Number DM54LS503J DM54LS503W
DM74LS503WM or DM74LS503N
See NS Package Number J16A M16B N16E or W16A
VCC e Pin 16
GND e Pin 8
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
TL F 10190 – 2
C1995 National Semiconductor Corporation TL F 10190
RRD-B30M105 Printed in U S A
1 page  
Physical Dimensions inches (millimeters) (Continued)
16-Lead Wide Small Outline Molded Package (M)
Order Number DM74LS503WM
NS Package Number M16B
16-Lead Molded Dual-In-Line Package (N)
Order Number DM74LS503N
NS Package Number N16E
5
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet DM54LS503.PDF ] | |
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