TXB0104RUTR Integrated Circuit Chip , 4 Bit Bidirectional Voltage Level Translator Microwave Integrated Circuits

1FEATURES

• 1.2 V to 3.6 V on A Port and 1.65 V to 5.5 V on B Port (VCCA ≤ VCCB)

• VCC Isolation Feature – If Either VCC Input Is at GND, All Outputs Are in the High-Impedance State

• OE Input Circuit Referenced to VCCA

• Low Power Consumption, 5-mA Max ICC

• Ioff Supports Partial-Power-Down Mode Operation

DESCRIPTION/ORDERING INFORMATION

This 4-bit noninverting translator uses two separate configurable power-supply rails. The A port is designed to track VCCA. VCCA accepts any supply voltage from 1.2 V to 3.6 V. The B port is designed to track VCCB. VCCB accepts any supply voltage from 1.65 V to 5.5 V. This allows for universal low-voltage bidirectional translation between any of the 1.2-V, 1.5-V, 1.8-V, 2.5-V, 3.3-V, and 5-V voltage nodes. VCCA should not exceed VCCB.

When the output-enable (OE) input is low, all outputs are placed in the high-impedance state. To ensure the high-impedance state during power up or power down, OE should be tied to GND through a pulldown resistor; the minimum value of the resistor is determined by the current-sourcing capability of the driver.

The TXB0104 is designed so that the OE input circuit is supplied by VCCA.

This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down.

Figure 3. Load Circuits and Voltage Waveforms

A. CL includes probe and jig capacitance.

B. All input pulses are supplied by generators having the following characteristics:

PRR
10 MHz, ZO = 50 Ω, dv/dt ≥ 1 V/ns.

C. The outputs are measured one at a time, with one transition per measurement.

D. tPLH and tPHL are the same as tpd.

E. VCCI is the VCC associated with the input port.

F. VCCO is the VCC associated with the output port.

G. All parameters and waveforms are not applicable to all devices.

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