Features: *Available in the Texas Instruments
NanoStar™and NanoFree™Packages
*Control Inputs VIH/VIL Levels Are
Referenced to VCCA Voltage
*Fully Configurable Dual-Rail Design Allows
Each Port to Operate Over the Full 1.2-V to
3.6-V Power-Supply Range
*I/Os Are 4.6-V Tolerant
*Ioff Supports Partial-Power-Down Mode Operation
*Bus Hold on Data Inputs Eliminates the
Need for External Pullup/Pulldown Resistors
*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)ApplicationAudio
Automotive
Broadband
Digital Control
Military
Optical Networking
Security
Telephony
Video & Imaging
Wireless Pinout
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 VCCA + 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 VCCA, VCCB, or GND . . . . . . . .. . . .±100 mA
Package thermal impedance, JA (see Note 3):DBV package. . . . .165/W
DCK package . .. . .259/W
YEP/YZP package. .123/W
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . .. −65 to 150
Description This single-bit noninverting bus transceiver SN74AVCH1T45 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 1.2 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 SN74AVCH1T45 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 SN74AVCH1T45 is designed so that the DIR input is powered by VCCA.
This device SN74AVCH1T45 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 SN74AVCH1T45 VCC isolation feature ensures that if either VCC input is at GND, then both outputs are in the high-impedance state. The bus-hold circuitry on the powered-up side always stays active.
SN74AVCH1T45 Active bus-hold circuitry holds unused or undriven inputs at a valid logic state. Use of pullup or pulldown resistors with the bus-hold circuitry is not recommended.
SN74AVCH1T45 NanoStar™ and NanoFree™ package technology is a major breakthrough in IC packaging concepts, using the
die as the package.
SN74AVCH1T45 Data Sheet
