1. General description
The 74ABT162245A; 74ABTH162245A is a 16-bit transceiver with 30 Ω termination resistors
and 3-state outputs. The device can be used as two 8-bit transceivers or one 16-bit transceiver.
The device features two output enables (1OE and 2OE) each controlling eight outputs, and two
send/receive (1DIR and 2DIR) inputs for direction control. A HIGH on nOE causes the outputs
to assume a high-impedance OFF-state. This device is fully specified for partial power down
applications using IOFF. The IOFF circuitry disables the output, preventing the potentially damaging
backflow current through the device when it is powered down.
Two options are available, 74ABT162245A which does not have the bus hold feature and the
74ABTH162245A which incorporates the bus hold feature.
2. Features and benefits
• 16-bit bidirectional bus interface
• Multiple VCC and GND pins minimize switching noise
• 3-state buffers
• Output capability: +12 mA/–32 mA
• 74ABTH162245A incorporates bus-hold data inputs which eliminate the need for external
pull-up resistors to hold unused inputs
• Integrated 30 Ω termination resistors
• Supply voltage range from 4.5 to 5.5 V
• BiCMOS high speed and output drive
• Direct interface with TTL levels
• Power-up 3-state
• IOFF circuitry provides partial Power-down mode operation
• Latch-up performance exceeds 500 mA per JESD 78 Class II Level B
• ESD protection:
• HBM JESD-A114E exceeds 2000 V
• CDM JESD22-C101C exceeds 1000 V
• Specified from -40 °C to +85 °C