SN74AVC2T245 (ACTIVE)

Dual-Bit, 2-DIR pin Dual-Supply Bus Transceiver w/ Configurable Voltage Translation, 3-State Output

Description

This dual-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. 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.

Description

The SN74AVC2T245 is designed for asynchronous communication between two data buses. The logic levels of the direction-control (DIR) input and the output-enable (OE) 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 always is active and must have a logic HIGH or LOW level applied to prevent excess ICC and ICCZ.

The SN74AVC2T245 is designed so that the control pins (DIR1, DIR2, and OE) 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, both ports are in the high-impedance state.

To ensure the high-impedance state during power up or power down, OE must be connected to VCC through a pull-up resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

Features

  • Each Channel Has Independent Direction Control
  • 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
  • Typical Data Rates
    • 500 Mbps (1.8-V to 3.3-V Translation)
    • 320 Mbps (<1.8-V to 3.3-V Translation)
    • 320 Mbps (Translate to 2.5 V or 1.8 V)
    • 280 Mbps (Translate to 1.5 V)
    • 240 Mbps (Translate to 1.2 V)
  • Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
  • ESD Protection Exceeds JESD 22
    • 5000-V Human-Body Model (A114-A)
    • 200-V Machine Model (A115-A)
    • 1500-V Charged-Device Model (C101)

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Parametrics Compare all products in Little Logic

 
Technology Family
Sub-Family
VCC (Min) (V)
VCC (Max) (V)
Bits (#)
Voltage (Nom) (V)
F @ Nom Voltage (Max) (Mhz)
ICC @ Nom Voltage (Max) (mA)
tpd @ Nom Voltage (Max) (ns)
Output Drive (IOL/IOH) (Max) (mA)
Input Type
Output Type
Logic
3-State Output
Schmitt Trigger
Rating
Operating Temperature Range (C)
Pin/Package
Approx. Price (US$)
SN74AVC2T245 SN74AVC2T244 SN74LVC2T45 TXB0102 TXS0102
AVC     AVC     LVC        
Dual Supply Translator     Dual Supply Translator     Dual Supply Translator     Dual Supply Translator     Dual Supply Translator    
1.2     0.9     1.65     1.2     1.65    
3.6     3.6     5.5     5.5     5.5    
2     2     2     2     2    
1.2
1.5
1.8
2.5
3.3    
0.9
1.2
1.5
1.8
2.5
3.3    
1.8
2.5
3.3
5    
3.3     3.3    
    150        
0.0008     0.0009     0.004     0.005     0.012    
2.5
2.1
1.9    
20
7
3.5    
17.7
10.3
8.3
7.2    
4.9     4.2    
12/-12     24/-24     32/-32        
CMOS     CMOS     CMOS/TTL     CMOS/TTL     TTL    
CMOS     CMOS     CMOS     CMOS     CMOS    
True     True     True     True     True    
Yes     No     Yes     No     No    
No     No     No     No     No    
Catalog     Catalog     Military     Catalog     Catalog    
  -40 to 85     -40 to 85     -40 to 85     -40 to 85    
10UQFN     8X2SON     8DSBGA
8SM8
8US8    
8DSBGA
8US8    
8DSBGA
8SM8
8US8
8X2SON    
0.40 | 1ku     0.42 | 1ku       0.39 | 1ku     0.33 | 1ku    
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