器件名称:
M74HCT165
功能描述:
8 BIT PISO SHIFT REGISTER
文件大小:
277.62KB 共13页
简 介:
M54HCT165 M74HCT165 8 BIT PISO SHIFT REGISTER . . . . . . . HIGH SPEED tPD = 17 ns (TYP.) AT VCC = 5 V LOW POWER DISSIPATION ICC = 4 A (MAX.) AT TA = 25 °C OUTPUT DRIVE CAPABILITY 10 LSTTL LOADS BALANCED PROPAGATION DELAYS tPLH = tPHL SYMMETRICAL OUTPUT IMPEDANCE IOL = IOH = 4 mA (MIN.) COMPATIBLE WITH TTL OUTPUTS VIH = 2 V (MIN.) VIL = 0.8 V (MAX.) PIN AND FUNCTION COMPATIBLE WITH 54/74LS165 B1R (Plastic Package) F1R (Ceramic Package) M1R (Micro Package) C1R (Chip Carrier) DESCRIPTION The M54/74HCT165 is a high speed CMOS 8 BIT PISO SHIFT REGISTER fabricated in silicon gate C2MOS technology. It has the same high speed performance of LSTTL combined with true CMOS low power consumption. It achives the high speed operation similar to equivalent LSTTL while maintaining the CMOS low power dissipation. This device contains eight clocked master slave RS flip-flops connected as a shift register, with auxiliary gating to provide over-riding asynchronous parallel entry. Parallel data entrens when the shift/load input is low. The parallel data can change while shift/load is low, provided that the recommended set-up and hold times are observed. For clocked operation, shift/load must be high. The two clock input perform identically; one can be used as a clock inhibit by applying a high signal; to permit this operation clocking is accomplished through a 2 input nor gates. To avoid double clocking, however, the inhibit signal should only go high while the clock is high. Otherwise th……
