SN54LVTH162245, SN74LVTH162245
3.3-V ABT 16-BIT BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS

SCBS260G – JUNE 1993 – REVISED JUNE 1997

• Members of the Texas Instruments WidebusE^TM Family
• State-of-the-Art Advanced BiCMOS Technology (ABT) Design for 3.3-V Operation and Low-Static Power Dissipation
• A-Port Outputs Have Equivalent 22- Series Resistors, So No External Resistors Are Required
• High-Impedance State During Power Up and Power Down
• Support Mixed-Mode Signal Operation (5-V Input and Output Voltages With 3.3-V V _{C C} )
• Support Unregulated Battery Operation Down to 2.7 V
• Typical V _OLP (Output Ground Bounce) < 0.8 V at V _CC = 3.3 V, T A = 25°C
• ESD Protection Exceeds 2000 V Per MIL-STD-883, Method 3015; Exceeds 200 V Using Machine Model (C = 200 pF, R = 0)
• Latch-Up Performance Exceeds 500 mA Per JESD 17
• Bus Hold on Data Inputs Eliminates the Need for External Pullup/Pulldown Resistors
• Power Off Disables Inputs/Outputs, Permitting Live Insertion
• Distributed V _CC and GND Pin Configuration Minimizes High-Speed Switching Noise
• Flow-Through Architecture Optimizes PCB Layout
• 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

description

The ’LVTH162245 are 16-bit (dual-octal) noninverting 3-state transceivers designed for low-voltage (3.3-V) V _CC operation, but with the capability to provide a TTL interface to a 5-V system environment.

These devices can be used as two 8-bit transceivers or one 16-bit transceiver. The devices 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.

The A-port outputs, which are designed to source or sink up to 12 mA, include equivalent 22- series resistors to reduce overshoot and undershoot.

Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level.

When V _CC is between 0 and 1.5 V, the devices are in the high-impedance state during power up or power down. However, to ensure the high-impedance state above 1.5 V, should be tied to V _CC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

The SN54LVTH162245 is characterized for operation over the full military temperature range of –55°C to 125°C.

The SN74LVTH162245 is characterized for operation from –40°C to 85°C.