Features: Control Inputs VIH/VILLevels are
Referenced to VCCA Voltage
VCC Isolation Feature − If Either VCC Input
Is at GND, Both Ports Are in the High-Impedance State
Overvoltage-Tolerant Inputs/Outputs Allow
Mixed-Voltage-Mode Data Communications
Fully Configurable Dual-Rail Design Allows
Each Port to Operate Over the Full 1.65-V to
5.5-V Power-Supply Range
Ioff Supports Partial-Power-Down Mode OperationPinout
SpecificationsSupply voltage range, VCCA and VCCB. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −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 (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 VCCA+ 0.5 V
B port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .−0.5 V to VCCB+ 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, and GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±100 mA
Package thermal impedance, JA(see Note 3):DGG package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 /W
DGV package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58/W
GQL/ZQL package . . . . . . . . . . . . . . . . . . . . . . . . . . . 42/W
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .−65 to 150 DescriptionThis SN74LVC16T245 16-bit noninverting bus transceiver uses two separate configurable power-supply rails. The SN74AVC16T245 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 SN74LVC16T245 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 SN74LVC16T245 is designed so that the control pins (1DIR, 2DIR, 1OE , and 2OE ) are supplied by VCCA.
This device SN74LVC16T245 is fully specified for partial-power-down applications using I off. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down.
The SN74LVC16T245 VCC isolation feature ensures that if either VCC input is at GND, both ports are in the high-impedance state.To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
SN74LVC16T245 Data Sheet
