SN74LVC2952A - Octal Bus Transceiver and Register With 3-State Outputs

This octal bus transceiver and register is designed for 1.65-V to 3.6-V V_CC operation.

The SN74LVC2952A consists of two 8-bit back-to-back registers that store data flowing in both directions between two bidirectional buses. Data on the A or B bus is stored in the registers on the low-to-high transition of the clock (CLKAB or CLKBA) input, provided that the clock-enable (CLKENAB\ or CLKENBA)\ input is low. Taking the output-enable (OEAB\ or OEBA)\ input low accesses the data on either port.

Inputs can be driven from either 3.3-V or 5-V devices. This feature allows the use of these devices as translators in a mixed 3.3-V/5-V system environment.

To ensure the high-impedance state during power up or power down, 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.

This device is fully specified for partial-power-down applications using I_off. The I_off circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down.

Products containing the "SN74LVC2952A" keyword are: SN74LVC2952ADBR , SN74LVC2952ADBR , SN74LVC2952ADBRG4 , SN74LVC2952ADW , SN74LVC2952ADW , SN74LVC2952ADWR , SN74LVC2952ADWR , SN74LVC2952ANSRG4 , SN74LVC2952APW , SN74LVC2952APW , SN74LVC2952APWR , SN74LVC2952APWR , SN74LVC2952APWRG4 , SN74LVC2952APWT

• Operates From 1.65 V to 3.6 V
• Inputs Accept Voltages to 5.5 V
• Max t_pd of 8.2 ns at 3.3 V
• Typical V_OLP (Output Ground Bounce)
     <0.8 V at V_CC = 3.3 V, T_A = 25°C
• Typical V_OHV (Output V_OH Undershoot)
     >2 V at V_CC = 3.3 V, T_A = 25°C
• Supports Mixed-Mode Signal Operation on All Ports (5-V Input/Output Voltage With 3.3-V V_CC)
• I_off Supports Partial-Power-Down Mode Operation
• Latch-Up Performance Exceeds 250 mA Per JESD 17
• ESD Protection Exceeds JESD 22
  • 2000-V Human-Body Model (A114-A)
  • 1000-V Charged-Device Model (C101)