The HEF4724B is an 8-bit addressable latch with three address inputs (A0 to A2), a data input (D), an active LOW enable input (E), an active HIGH clear input (CL), and eight parallel latch outputs (O0 to O7). When E and CL are HIGH, all outputs (O0 to O7) are LOW. Eight-channel demultiplexing or active HIGH 1-of-8 decoding with output enable operation occurs.
GH, the contents of the latch are stored. When operating in the addressable latch mode (E = CL = LOW), changing more than one bit of A0 to A2 could impose a transient wrong address. Therefore, this should only be done while in the memory mode (E = HIGH, CL = LOW). Fig.2 Pinning diagram. et4U.com DataSheet4U.com DataShee 16-lead DIL; plastic (SOT38-1) 16-lead DIL; ceramic (cerdip) (SOT74) 16-lead SO; plastic (SOT109-1) HEF4724BP(N): HEF4724BD(F): HEF4724BT(D): ( ): Package Designator North America PINNING A0 to A2 Fig.1 Functional diagram. A E CL O0 to O7 address inputs data input enable .
No. | Partie # | Fabricant | Description | Fiche Technique |
---|---|---|---|---|
1 | HEF4720B |
NXP |
256-bit/ 1-bit per word random access memories | |
2 | HEF4720V |
NXP |
256-bit/ 1-bit per word random access memories | |
3 | HEF4731B |
NXP |
Quadruple 64-bit static shift register | |
4 | HEF4731V |
NXP |
Quadruple 64-bit static shift register | |
5 | HEF4737B |
NXP |
Quadruple static decade counters | |
6 | HEF4737V |
NXP |
Quadruple static decade counters | |
7 | HEF4738V |
NXP |
IEC/IEEE bus interface | |
8 | HEF4750V |
NXP |
Frequency synthesizer | |
9 | HEF4751V |
NXP |
Universal divider | |
10 | HEF4752V |
NXP |
A.C. motor control circuit | |
11 | HEF4753B |
NXP |
Universal timer module | |
12 | HEF4754V |
NXP |
18-element bar graph LCD driver |