SN74HC166A-Q1 Texas instruments

SN74HC166A-Q1

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SN74HC166A-Q1

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Описание

This parallel-in or serial-in, serial-out register features gated clock (CLK, CLK INH) inputs and an overriding clear (CLR) input. The parallel-in or serial-in modes are established by the shift/load (SH/LD) input. When high, SH/LD enables the serial (SER) data input and couples the eight flip-flops for serial shifting with each clock (CLK) pulse. When low, the parallel (broadside) data inputs are enabled, and synchronous loading occurs on the next clock pulse. During parallel loading, serial data flow is inhibited. Clocking is accomplished on the low-to-high-level edge of CLK through a 2-input positive-NOR gate, permitting one input to be used as a clock-enable or clock-inhibit function. Holding either CLK or CLK INH high inhibits clocking; holding either low enables the other clock input. This allows the system clock to be free running, and the register can be stopped on command with the other clock input. CLK INH should be changed to the high level only when CLK is high. CLR overrides all other inputs, including CLK, and resets all flip-flops to zero.

Qualified for Automotive Applications
ESD Protection Exceeds 2000 V Per MIL-STD-883, Method 3015; Exceeds 200 V Using Machine Model (C = 200 pF, R = 0)
Wide Operating Voltage Range of 2 V to 6 V
Outputs Can Drive Up To 10 LSTTL Loads
Low Power Consumption, 80-µA Max I_CC
Typical t_pd = 13 ns
±4-mA Output Drive at 5 V
Low Input Current of 1 µA Max
Synchronous Load
Direct Overriding Clear
Parallel-to-Serial Conversion

Configuration	Parallel-in, Serial-out
Bits (#)	8
Technology family	HC
Supply voltage (min) (V)	2
Supply voltage (max) (V)	6
Input type	Standard CMOS
Output type	Push-Pull
Clock frequency (MHz)	29
IOL (max) (mA)	5.2
IOH (max) (mA)	-5.2
Supply current (max) (µA)	80
Features	Balanced outputs, High speed (tpd 10-50ns), Positive input clamp diode
Operating temperature range (°C)	-40 to 125, -40 to 85
Rating	Automotive