Features: `Control Inputs VIH/VIL Levels Are Referenced to VCCA Voltage
`VCC Isolation Feature − If Either VCC Input Is at GND, All I/O Ports Are in the High-Impedance State
` Ioff Supports Partial-Power-Down Mode Operation
`Fully Configurable Dual-Rail Design Allows Each Port to Operate Over the Full 1.4-V to 3.6-V Power-Supply Rang
`Max Data Rates:
− 170 Mbps (1.2 V (VCCA or VCCB) 3.3 V)
− 320 Mbps (1.8 V (VCCA or VCCB) 3.3 V)
`Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
`ESD Protection Exceeds JESD 22
− 2000-V Human-Body Model (A114-A)
− 200-V Machine Model (A115-A)
− 1000-V Charged-Device Model (C101)Pinout
SpecificationsSupply voltage range, VCCA and VCCB. . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . -0.5 V to 4.6 V
Input voltage range, V1 (see Note 1): I/O ports (A port) -0.5 V to 4.6 V. . . . . . -0.5 V to 4.6 V
I/O ports (B 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+ 0.5 V
B port. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5 V to VCCB+ 0.5 V
Input clamp current, IIK (V < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -50 mA
Output clamp current, IOK (VO < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -50 mA
Continuous output current, IO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . ±50 mA
Continuous current through VCCA, VCCB , or GND . . . . . . . . . . . . . . . . . . . . . .. . . . . .±100 mA
Package thermal impedance, JA(see Note 3):DGV package . . . . . . . . . . . . . . . .. . . . .86/W
PW package. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88/W
RHL package. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43/W
Storage temperature range, Tstg. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -65 to 150
DescriptionThis 8-bit noninverting bus transceiver uses two separate configurable power-supply rails. The SN74AVC8T245 is optimized to operate with VCCA/VCCB set at 1.4 V to 3.6 V. It is operational with VCCA/VCCB as low as 1.2 V. 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 1.2 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 SN74AVC8T245 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 SN74AVC8T245 is designed so the control pins (DIR and OE) are supplied by VCCA.
The SN74AVC8T245 solution is compatible with a single-supply system and can be replaced later with a '245 function, with minimal printed circuit board redesign.
This SN74AVC8T245 device is fully specified for partial-power-down applications using Ioff.The loff circuitry disables the outputs,preventing damaging current backflow through the device when it is powered down.The VCC isolation feature ensures that if either V input is at GND, both ports are in the high-impedance state.
To ensure the high-impedance state of SN74AVC8T245 during power up or power down, OE shall be tide to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
SN74AVC8T245 Data Sheet
