SN54ABTE16246, SN74ABTE16246
11-BIT INCIDENT-WAVE SWITCHING BUS TRANSCEIVERS
WITH 3-STATE AND OPEN-COLLECTOR OUTPUTS

SCBS227E - JULY 1993 - REVISED MARCH 1997

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of TexasInstruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

features

• Support the VME64 ETL Specification
• Reduced TTL-Compatible Input Threshold Range
• High-Drive Outputs (I_OH = -60 mA I_OL = 90 mA) Support Equivalent 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 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
• Equivalent 25- Series-Damping Resistor on B Port
• Bus Hold on Data Inputs Eliminates the Need for External Pullup/Pulldown 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) Package Using 25-mil Center-to-Center Spacings

Widebus and EPICII-B are trademarks of Texas Instruments Incorporated.

description

The 'ABTE16246 are 11-bit noninverting transceivers designed for asynchronous two-way communication between buses. These devices have open-collector and 3-state outputs. 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 an equivalent 25- series output resistor to reduce ringing. Active bus-hold inputs on the B port 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 SN54ABTE16246 is characterized for operation over the full military temperature range of -55°C to 125°C. The SN74ABTE16246 is characterized for operation from -40°C to 85°C.