SN74LVT16245B - 3.3-V ABT 16-Bit Bus Transceivers With 3-State Outputs

The 'LVT16245B devices are 16-bit (dual-octal) noninverting 3-state transceivers designed for low-voltage (3.3-V) V_CC operation, but with the capability to provide a TTL interface to a 5-V system environment.

These devices are 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 I_CC and I_CCZ.

When V_CC is between 0 and 1.5 V, the devices are in the high-impedance state during power up or power down. However, to ensure the high-impedance state above 1.5 V, OE should be tied to V_CC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

These devices are fully specified for hot-insertion applications using I_off and power-up 3-state. The I_off circuitry disables the outputs, preventing damaging current backflow through the devices when they are powered down. The power-up 3-state circuitry places the outputs in the high-impedance state during power up and power down, which prevents driver conflict.

Products containing the "SN74LVT16245B" keyword are: SN74LVT16245BDGG , SN74LVT16245BDGGR , SN74LVT16245BDGGR , SN74LVT16245BDGGRE4 , SN74LVT16245BDGGRG4 , SN74LVT16245BDGVR , SN74LVT16245BDGVR , SN74LVT16245BDL , SN74LVT16245BDL , SN74LVT16245BDLG4 , SN74LVT16245BDLG4 , SN74LVT16245BDLR , SN74LVT16245BDLR , SN74LVT16245BDLR(LVT1624 , SN74LVT16245BDLRG4 , SN74LVT16245BGQLR , SN74LVT16245BGQLR , SN74LVT16245BGRDR , SN74LVT16245BZQLR , SN74LVT16245BZQLR

• Member of the Texas Instruments Widebus™Family
• State-of-the-Art Advanced BiCMOS Technology (ABT) Design for 3.3-V Operation and Low Static-Power Dissipation
• Support Mixed-Mode Signal Operation (5-V Input and Output Voltages With 3.3-V V_CC)
• Support Unregulated Battery Operation Down to 2.7 V
• Typical V_OLP (Output Ground Bounce) <0.8 V at V_CC = 3.3 V, T_A = 25°C
• I_off and Power-Up 3-State Support Hot Insertion
• Distributed V_CC and GND Pins Minimize High-Speed Switching Noise
• Flow-Through Architecture Optimizes PCB Layout
• 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)

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