CD4724BCN ,Dual 4-Bit/ 8-Bit Addressable LatchFeaturesThe CD4724BC is an 8-bit addressable latch with three
CD4724BCM-CD4724BCN
Dual 8-Bit Addressable Latch
CD4724BC 8-Bit Addressable Latch October 1987 Revised May 2002 CD4724BC 8-Bit Addressable Latch General Description Features The CD4724BC is an 8-bit addressable latch with threeWide supply voltage range: 3.0V to 15V address inputs (A0–A2), an active low enable input (E),High noise immunity: 0.45 V (typ.) DD active high clear input (C ), a data input (D) and eight out- L Low power TTL compatibility: puts (Q0–Q7). fan out of 2 driving 74L or 1 driving 74LS Data is entered into a particular bit in the latch when that is Serial to parallel capability addressed by the address inputs and the enable (E) is LOW. Data entry is inhibited when enable (E) is HIGH.Storage register capability Random (addressable) data entry When clear (C ) and enable (E) are HIGH, all outputs are L LOW. When clear (C ) is HIGH and enable (E) is LOW, theActive high demultiplexing capability L channel demultiplexing occurs. The bit that is addressedCommon active high clear has an active output which follows the data input while all unaddressed bits are held LOW. When operating in the addressable latch mode (E = C = LOW), changing more L 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, C = LOW). L Ordering Code: Order Number Package Number Package Description CD4724BCM M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150" Narrow CD4724BCN N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. Connection Diagram Truth Table Mode Selection C E Addressed Unaddressed Mode L Latch Latch L L Follows Data Holds Previous Addressable Data Latch H L Hold Previous Holds Previous Memory Data Data L H Follows Data Reset to “0” Demultiplexer H H Reset to “0” Reset to “0” Clear Top View © 2002 DS006003
