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MC54-74HC259A Datasheet(PDF) 1 Page - Motorola, Inc |
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MC54-74HC259A Datasheet(HTML) 1 Page - Motorola, Inc |
1 / 8 page MOTOROLA SEMICONDUCTOR TECHNICAL DATA 1 REV 0 © Motorola, Inc. 1995 10/95 Product Preview 8-Bit Addressable Latch 1-of-8 Decoder High–Performance Silicon–Gate CMOS The MC54/74HC259A is identical in pinout to the LS259. The device inputs are compatible with standard CMOS outputs; with pullup resistors, they are compatible with LSTTL outputs. The HC259A has four modes of operation as shown in the mode selection table. In the addressable latch mode, the data on Data In is written into the addressed latch. The addressed latch follows the data input with all non–addressed latches remaining in their previous states. In the memory mode, all latches remain in their previous state and are unaffected by the Data or Address inputs. In the one–of–eight decoding or demultiplexing mode, the addressed output follows the state of Data In with all other outputs in the LOW state. In the Reset mode all outputs are LOW and unaffected by the address and data inputs. When operating the HC259A as an addressable latch, 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. • Output Drive Capability: 10 LSTTL Loads • Outputs Directly Interface to CMOS, NMOS, and TTL • Operating Voltage Range: 2 to 6 V • Low Input Current: 1 µA • High Noise Immunity Characteristic of CMOS Devices • In Compliance with the Requirements Defined by JEDEC Standard No. 7A • Chip Complexity: 202 FETs or 50.5 Equivalent Gates LOGIC DIAGRAM ADDRESS INPUTS A0 A1 A2 DATA IN RESET ENABLE 14 15 13 3 2 1 12 11 10 9 7 6 5 4 Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7 PIN 16 = VCC PIN 8 = GND NONINVERTING OUTPUTS LATCH SELECTION TABLE Address Inputs Latch C B A Addressed L L L Q0 L L H Q1 L H L Q2 L H H Q3 H L L Q4 H L H Q5 H H L Q6 H H H Q7 MODE SELECTION TABLE Enable Reset Mode L H Addressable Latch H H Memory L L 8–Line Demultiplexer H L Reset This document contains information on a product under development. Motorola reserves the right to change or discontinue this product without notice. MC54/74HC259A PIN ASSIGNMENT 13 14 15 16 9 10 11 12 5 4 3 2 1 8 7 6 Q7 DATA IN ENABLE RESET VCC Q4 Q5 Q6 Q0 A2 A1 A0 GND Q3 Q2 Q1 D SUFFIX SOIC PACKAGE CASE 751B–05 N SUFFIX PLASTIC PACKAGE CASE 648–08 ORDERING INFORMATION MC54HCXXXAJ MC74HCXXXAN MC74HCXXXAD MC74HCXXXADT Ceramic Plastic SOIC TSSOP 1 16 1 16 J SUFFIX CERAMIC PACKAGE CASE 620–10 1 16 1 16 DT SUFFIX TSSOP PACKAGE CASE 948F–01 |
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