4-Bit Dual-Supply Bus Transceiver with Configurable Voltage Translation and 3-State Outputs - SN74AVC4T245

SN74AVC4T245 (ACTIVE)

4-Bit Dual-Supply Bus Transceiver with Configurable Voltage Translation and 3-State Outputs

Description

This 4-bit noninverting bus transceiver uses two separate configurable power-supply rails. The A port is designed to track VCCA. VCCA accepts any supply voltage from 1.2 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. The SN74AVC4T245 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. 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 SN74AVC4T245 is designed for asynchronous communication between two data buses. The logic levels of the direction-control (DIR) input and the output-enable (OE) input activate either the B-port outputs or the A-port outputs or place both output ports into the high-impedance mode. The device transmits data from the A bus to the B bus when the B-port outputs are activated, and from the B bus to the A bus when the A-port outputs are activated. The input circuitry on both A and B ports is always active and must have a logic HIGH or LOW level applied to prevent excess ICC and ICCZ.

The SN74AVC4T245 is designed so that the control pins (1DIR, 2DIR, 1OE, and 2OE) are supplied by VCCA.

This 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 VCC isolation feature ensures that if either VCC input is at GND, then 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.

Features

  • 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
  • Maximim Data Rates
    • 380 Mbps (1.8-V to 3.3-V Translation)
    • 200 Mbps (<1.8-V to 3.3-V Translation)
    • 200 Mbps (Translate to 2.5 V or 1.8 V)
    • 150 Mbps (Translate to 1.5 V)
    • 100 Mbps (Translate to 1.2 V)
  • Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
  • ESD Protection Exceeds JESD 22
    • 8000-V Human-Body Model (A114-A)
    • 150-V Machine Model (A115-A)
    • 1000-V Charged-Device Model (C101)

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Parametrics Compare all products in Dual Supply Translator

 
Technology Family
Bits (#)
VCCA (Min) (V)
VCCA (Max) (V)
VCCB (Min) (V)
VCCB (Max) (V)
tpd @ Nom Voltage (Max) (ns)
Max Drive (mA)
Schmitt Trigger
Rating
Operating Temperature Range (C)
Approx. Price (US$)
Pin/Package
SN74AVC4T245 SN74AVC4T234 SN74AVC4T774 TXB0104 TXS0104E
AVC     AVC     AVC        
4     4     4     4     4    
1.2     0.9     1.2     1.2     1.65    
3.6     3.6     3.6     3.6     3.6    
1.2     0.9     1.2     1.65     2.3    
3.6     3.6     3.6     5.5     5.5    
2.9     3.6     2.4        
12     12     12     50     24    
No     No     No     No     No    
Catalog     Catalog     Catalog     Catalog     Catalog    
-40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85    
0.35 | 1ku     0.60 | 1ku     0.50 | 1ku     0.55 | 1ku     0.65 | 1ku    
16SOIC
16SSOP
16TSSOP
16VQFN
16TVSOP
16UQFN    
11uCSP     16TSSOP
16VQFN
16UQFN    
12BGA MICROSTAR JUNIOR
12DSBGA
12UQFN
14SOIC
14TSSOP
14VQFN    
12BGA MICROSTAR JUNIOR
12DSBGA
14SOIC
14TSSOP
14VQFN    

Other qualified versions of SN74AVC4T245

Version Part Number Definition
Automotive SN74AVC4T245-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects
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