SN54ABTE16245, SN74ABTE16245
16-BIT INCIDENT-WAVE SWITCHING BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS

SCBS226F - JULY 1993 - REVISED AUGUST 1996

features

• Support the VME64 ETL Specification
• Reduced, TTL-Compatible, Input Threshold Range
• High-Drive Outputs (I_OH = -60 mA, I_OL = 90 mA) Support 25- Incident-Wave Switching
• V_CCBIAS Pin Minimizes Signal Distortion During Live Insertion
• Internal Pullup Resistor on Keeps Outputs in High-Impedance State During Power Up or Power Down
• Members of the Texas Instruments (TI) Widebus^TM Family
• State-of-the-Art EPIC-IIB^TM BiCMOS Design Significantly Reduces Power Dissipation
• Distributed V_CC and GND Pin Configuration Minimizes High-Speed Switching Noise
• 25- Series Damping Resistor on B Port
• Bus Hold on Data Inputs Eliminates the Need for External Pullup Resistors
• Package Options Include Plastic 300-mil Shrink Small-Outline (DL) and Thin Shrink Small-Outline (DGG) Packages and 380-Mil Fine-Pitch Ceramic Flat (WD) Packages Using 25-mil Center-to-Center Spacings

Widebus and EPIC-IIB are trademarks of Texas Instruments Incorporated.

description

The 'ABTE16245 are 16-bit (dual-octal) noninverting 3-state transceivers designed for synchronous two-way communication between data buses. The control-function implementation minimizes external timing requirements. These devices can be used as two 8-bit transceivers or one 16-bit transceiver. They allow data transmission from the A bus to the B bus or from the B bus to the A bus, depending on the logic level at the direction-control (DIR) input. The output-enable () input can be used to disable the device so that the buses are effectively isolated. When is low, the device is active.

The B port has a 25- series output resistor to reduce ringing. Active bus-hold inputs are also found on the B port to hold unused or floating inputs at a valid logic level.

The A port provides for the precharging of the outputs via V_CCBIAS, which establishes a voltage between 1.3 V and 1.7 V when V_CC is not connected.

The SN74ABTE16245 is available in TI's shrink small-outline package (DL), which provides twice the I/O pin count and functionality of standard small-outline packages in the same printed-circuit-board area.

The SN54ABTE16245 is characterized for operation over the full military temperature range of -55°C to 125°C. The SN74ABTE16245 is characterized for operation from -40°C to 85°C.