Features: ` Member of the Texas Instruments Widebus™ Family
` Overvoltage-Tolerant Inputs/Outputs Allow Mixed-Voltage-Mode Data Communications
` DOC™ Circuitry Dynamically Changes Output
` Ioff Supports Partial-Power-Down Mode Impedance, Resulting in Noise Reduction Operation Without Speed Degradation
` Fully Configurable Dual-Rail Design Allows
` Dynamic Drive Capability Is Equivalent to Each Port to Operate Over the Full 1.4-V to Standard Outputs With IOH and IOL of ±24 mA 3.6-V Power-Supply Range at 2.5-V VCC
` Latch-Up Performance Exceeds 100 mA Per
` Control Inputs VIH/VIL Levels Are Referenced JESD 78, Class II to VCCA Voltage
` ESD Protection Exceeds JESD 22
` If Either VCC Input Is at GND, Both Ports Are in 2000-V Human-Body Model (A114-A) the High-Impedance State 200-V Machine Model (A115-A)
1000-V Charged-Device Model (C101)
Specifications
| |
MIN |
MAX |
UNIT |
| VCC |
Supply voltage range |
0.5 |
4.6 |
V |
| VI |
Input voltage range(2) |
I/O ports (A port) |
0.5 |
4.6 |
V |
| I/O ports (B port) |
0.5 |
4.6 |
| Control inputs |
0.5 |
4.6 |
| VO |
Voltage range applied to any output in the high-impedance or power-off state(2) |
A port |
0.5 |
4.6 |
V |
| B port |
0.5 |
4.6 |
| VO |
Output voltage range applied in the high or low state(2) (3) |
A port |
0.5 |
VCCA + 0.5 |
V |
| B port |
0.5 |
VCCB + 0.5 |
| IIK |
Input clamp current |
VI < 0 |
|
20 |
mA |
| IOK |
Output clamp current |
VO < 0 |
|
±50 |
mA |
| IO |
Continuous output current |
|
±35 |
mA |
| Continuous current throughVCCA,VCCB or GND |
|
±70 |
mA |
| JA |
Package thermal impedance (4) |
DGG package |
|
70 |
°C/W |
| DGV package |
|
58 |
| GQL/ZQL package |
|
42 |
| Tstg |
Storage temperature range |
65 |
150 |
°C |
1) Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) The input and output negative-voltage ratings may be exceeded if the input and output current ratings are bserved.
(3) The output positive-voltage rating may be exceeded up to 4.6 V maximum if the output current rating is observed.
(4) The package thermal impedance is calculated in accordance with JESD 51-7.
DescriptionThis SN74AVCA164245 16-bit (dual-octal) noninverting bus transceiver uses two separate configurable power-supply rails. The A port is designed to track VCCA. VCCA accepts any supply voltage from 1.4 V to 3.6 V. The B port is designed to track VCCB. VCCB accepts any supply voltage from 1.4 V to 3.6 V. This allows for universal low-voltage bidirectional ranslation between any of the 1.5-V, 1.8-V, 2.5-V, and 3.3-V voltage nodes.
The SN74AVCA164245 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 SN74AVCA164245 is designed so that the control pins (1DIR, 2DIR, 1OE, and 2OE) are supplied by VCCA.
To ensure the high-impedance state of SN74AVCA164245 during power up or power down, OE should be tied to VCCA through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
This SN74AVCA164245 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. If either VCC input is at GND,
then both ports are in the high-impedance state.
SN74AVCA164245 Data Sheet
