SN74AVC32T245

Supply voltage range, V_CC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 4.6 V
Input voltage range, VI (see Note 1) I/O ports (A port). . . . . . . . . . . . . . . .. . . . . . −0.5 V to 4.6 V
                                                          I/O ports (A port). .. . . . . . . . . . . . . .. . . . . . . −0.5 V to 4.6 V
                                                          Control inputs). . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 4.6 V
Voltage range applied to any output in the high-impedance or power-off state, VO
(see Note 1) (A port). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . −0.5 V to 4.6 V
                    (B port). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . −0.5 V to 4.6 V
Voltage range applied to any output in the high or low state, VO
(see Notes 1 and 2) (A port). . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . −0.5 V to V_CCA + 0.5 V
                                (B port). . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . −0.5 V to V_CCB + 0.5 V
Input clamp current, IIK (VI < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50 mA
Output clamp current, IOK (VO < 0) . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . .50 mA
Continuous output current, IO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .±50 mA
Continuous current through each VCCA, VCCB, or GND pin. . . . . . . . . . . . . .. . .. . . . . . . .±100 mA
Package thermal impedance, JA (see Note 3): GKE/ZKE package. . . . . . . . . . . . . .. . . . . .40°C/W
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65°C to 150°C
1. The input negative-voltage and output voltage ratings may be exceeded if the input and output current ratings are observed.
2. The value of VCC is provided in the recommended operating conditions table.
3. The package thermal impedance is calculated in accordance with JESD 51-7.

This 32-bit noninverting bus transceiver uses two separate configurable power-supply rails. The SN74AVC32T245 is optimized to operate with V_CCA/V_CCB set at 1.4 V to 3.6 V. It is operational with V_CCA/V_CCB as low as 1.2 V. The A port is designed to track V_CCA. V_CCA accepts any supply voltage from 1.2 V to 3.6 V. The B port is designed to track V_CCB. V_CCB accepts any supply voltage from 1.2 V to 3.6 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, and 3.3-V voltage nodes.

The SN74AVC32T245 is designed for asynchronous communication between data buses. The device transmits data 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 (OE) input can be used to disable the outputs so the buses are effectively isolated.

The SN74AVC32T245 is designed so that the control pins (1DIR, 2DIR, 3DIR, 4DIR, 1OE, 2OE, 3OE, and 4OE) are supplied by V_CCA.

This  SN74AVC32T245 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.

The V_CC isolation feature ensures that if either V_CC input is at GND, then both ports are in the high-impedance state.

To ensure the high-impedance state of SN74AVC32T245 during power up or power down, OE 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.