SN74LS164

The SN74LS164 is a high speed 8-Bit Serial-In Parallel-Out Shift Register. Serial data is entered through a 2-Input AND gate synchronous with the LOW to HIGH transition of the clock. The device features an asynchronous Master Reset which clears the register setting all outputs LOW independent of the clock. It utilizes the Schottky diode clamped process to achieve high speeds and is fully compatible with all ON Semiconductor TTL products. The feature of SN74LS164 are as follows: (1)typical shift frequency of 35 MHz; (2)asynchronous master reset; (3)gated serial data input; (4)fully synchronous data transfers; (5)input clamp diodes limit high speed termination effects; (6)ESD > 3500 Volts.

The absolute maximum ratings of the SN74LS164 are: (1)supply voltage: 4.75V min, 5.25V max and 5.0V typical; (2)operating ambient temperature range: 25 to 70; (3)output current high: 0.4 mA; (4)output current low: 8.0 mA.

The following is about the electrical characteristics of SN74LS164: (1)input high voltage: 2.0 V min at guaranteed input high voltage for all inputs; (2)input low voltage: 0.8 V max at guaranteed input low voltage for all inputs; (3)input clamp diode voltage: -0.65V typical and -1.5 V max at VCC = MIN, IIN = - 18 mA; (4)output high voltage: 2.7V min and 3.5V typical at VCC = MIN, IOH = MAX, VIN = VIH or VIL per truth table; (5)output low voltage: 0.25V typical and 0.4V max at IOL = 4.0 mA, VCC = VCC MIN, VIN = VIH or VIL, per truth table; (6)input high current: 20  A min at VCC = MAX, VIN = 2.7 V; (7)short circuit current:  -20mA min and -100mA max at VCC = MAX; (8)power supply current: 27mA max at VCC = MAX.