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The 'LV595A devices are 8-bit shift registers designed for 2-V to 5.5-V VCC operation.
These devices contain an 8-bit serial-in, parallel-out shift register that feeds an 8-bit D-type storage register. The storage register has parallel 3-state outputs. Separate clocks are provided for both the shift and storage register. The shift register has a direct overriding clear (SRCLR) input, serial (SER) input, and a serial output for cascading. When the output-enable (OE) input is high, all outputs except QH are in the high-impedance state.
Both the shift register clock (SRCLK) and storage register clock (RCLK) are positive-edge triggered. If both clocks are connected together, the shift register always is one clock pulse ahead of the storage register.
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.
These devices are fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the devices when they are powered down.
* 2-V to 5.5-V VCC Operation * Max tpd of 7.1 ns at 5 V * Typical VOLP (Output Ground Bounce) <0.8 V at VCC = 3.3 V, TA = 25 * Typical VOHV (Output VOH Undershoot) >2.3 V at VCC = 3.3 V, TA = 25 * Support Mixed-Mode Voltage Operation on All Ports * 8-Bit Serial-In, Parallel-Out Shift * Ioff Supports Partial-Power-Down Mode Operation * Shift Register Has Direct Clear * Latch-Up Performance Exceeds 250 mA Per JESD 17 * ESD Protection Exceeds JESD 22 − 2000-V Human-Body Model (A114-A) − 200-V Machine Model (A115-A) − 1000-V Charged-Device Model (C101)