Features: *2-V to 5.5-V VCC Operation* Max tpd of 10.5 ns at 5 V* Support Mixed-Mode Voltage Operation on All Ports* Ioff 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) − 200...
SN54LV165A: Features: *2-V to 5.5-V VCC Operation* Max tpd of 10.5 ns at 5 V* Support Mixed-Mode Voltage Operation on All Ports* Ioff Supports Partial-Power-Down Mode Operation* Latch-Up Performance Exceeds 250...
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Features: PinoutSpecificationsDescriptionThe SN54/74LS147 and SN54/74LS148 are Priority Encoders. ...
PinoutDescriptionThe LS155 and LS156 are Dual 1-of-4 Decoder/Demultiplexers with common Address in...

The 'LV165A devices are parallel-load, 8-bit shift registers designed for 2-V to 5.5-V VCC operation.
When the LV165A is clocked, data is shifted toward the serial output QH. Parallel-in access to each stage is provided by eight individual direct data inputs that are enabled by a low level at the shift/load (SH/LD) input. The 'LV165A devices feature a clock-inhibit function and a complemented serial output, QH.
Clocking is accomplished by a low-to-high transition of the clock (CLK) input while SH/LD is held high and clock inhibit (CLK INH) is held low. The functions of CLK and CLK INH are interchangeable. Since a low CLK and a low-to-high transition of CLK INH accomplishes clocking, CLK INH LV165A should be changed to the high level only while CLK is high. Parallel loading is inhibited when SH/LD is held high. The parallel inputs to the register are enabled while SH/LD is held low, independently of the levels of CLK, CLK INH, or SER.
LV165A is 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.