HD74ALVCH162373 Datasheet, PDF (1/12 Pages) Hitachi Semiconductor – 16-bit Transparent D-type Latches with 3-state Outputs

HD74ALVCH162373
16-bit Transparent D-type Latches with 3-state Outputs
ADE-205-179 (Z)
Preliminary
1st. Edition
December 1996
Description
The HD74ALVCH162373 is particularly suitable for implementing buffer registers, I/O ports, bidirectional
bus drivers, and working registers. It can be used as two 8-bit latches or one 16-bit latch. When the latch
enable (LE) input is high, the Q outputs follow the data (D) inputs. When LE is taken low, the Q outputs
are latched at the levels set up at the D inputs. Active bus hold circuitry is provided to hold unused or
floating data inputs at a valid logic level. All outputs, which are designed to sink up to 12 mA, include 26
Ω resistors to reduce overshoot and undershoot.
Features
• V_CC = 2.3 V to 3.6 V
• Typical V_OL ground bounce < 0.8 V (@V_CC = 3.3 V, Ta = 25°C)
• Typical V_OH undershoot > 2.0 V (@V_CC = 3.3 V, Ta = 25°C)
• High output current ±12 mA (@V_CC = 3.0 V)
• Bus hold on data inputs eliminates the need for external pullup / pulldown resistors
• All outputs have equivalent 26 Ω series resistors, so no external resistors are required.