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PDF CD4099BC Data sheet ( Hoja de datos )
| Número de pieza | CD4099BC | |
| Descripción | 8-Bit Addressable Latch | |
| Fabricantes | Fairchild Semiconductor | |
| Logotipo |  |
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October 1987
Revised January 1999
CD4099BC
8-Bit Addressable Latch
General Description
The CD4099BC is an 8-bit addressable latch with three
address inputs (A0–A2), an active low enable input (E),
active high clear input (CL), a data input (D), and eight out-
puts (Q0–Q7).
Data is entered into a particular bit in the latch when that bit
is addressed by the address inputs and the enable (E) is
LOW. Data entry is inhibited when enable (E) is HIGH.
When clear (CL) and enable (E) are HIGH, all outputs are
LOW. When clear (CL) is HIGH and enable (E) is LOW, the
channel demultiplexing occurs. The bit that is addressed
has an active output which follows the data input while all
unaddressed bits are held LOW. When operating in the
addressable latch mode (E = CL = LOW), changing more
than one bit of the address could impose a transient wrong
address. Therefore, this should only be done while in the
memory mode (E = HIGH, CL = LOW).
Features
s Wide supply voltage range: 3.0V to 15V
s High noise immunity: 0.45 VDD (typ.)
s Low power TTL: fan out of 2 driving 74L
compatibility: or 1 driving 74LS
s Serial to parallel capability
s Storage register capability
s Random (addressable) data entry
s Active high demultiplexing capability
s Common active high clear
Ordering Code:
Order Number Package Number
Package Description
CD4099BCN
N16E
16-Lead Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide
Connection Diagram
Pin Assignments for DIP
Truth Table
Top View
Mode Selection
E CL
Addressed
Unaddressed
Mode
Latch
Latch
L L Follows Data
Holds Previous Data Addressable Latch
H L Holds Previous Data Holds Previous Data Memory
L H Follows Data
Reset to “0”
Demultiplexer
H H Reset to “0”
Reset to “0”
Clear
© 1999 Fairchild Semiconductor Corporation DS005984.prf
www.fairchildsemi.com
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| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet CD4099BC.PDF ] | |
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