器件名称:
M74HC393TTR
功能描述:
DUAL BINARY COUNTER
文件大小:
199.13KB 共11页
简 介:
M74HC393 DUAL BINARY COUNTER s s s s s s s HIGH SPEED : fMAX = 79 MHz (TYP.) at VCC = 6V LOW POWER DISSIPATION: ICC =4A(MAX.) at TA=25°C HIGH NOISE IMMUNITY: VNIH = V NIL = 28 % VCC (MIN.) SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL = 4mA (MIN) BALANCED PROPAGATION DELAYS: tPLH tPHL WIDE OPERATING VOLTAGE RANGE: VCC (OPR) = 2V to 6V PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 393 DIP SOP TSSOP ORDER CODES PACKAGE DIP SOP TSSOP TUBE M74HC393B1R M74HC393M1R T&R M74HC393RM13TR M74HC393TTR DESCRIPTION The M74HC393 is an high speed CMOS DUAL BINARY COUNTER fabricated with silicon gate C2MOS technology. This counter circuit contains independent ripple carry counters and two 4-bit ripple carry binary counters, which can be cascaded to create a single divide by 256 counter. Each 4-bit counter is incremented on the high to low transition (negative edge) of the clock input, and each has an independent clear input. When CLEAR is set to low, all four bits of each counter are set to a low level. This enables count truncation and allows the implementation of divide by N counter configurations. All inputs are equipped with protection circuits against static discharge and transient excess voltage. PIN CONNECTION AND IEC LOGIC SYMBOLS July 2001 1/11 M74HC393 INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION PIN No 1, 13 2, 12 3, 4, 5, 6 11, 10, 9, 8 7 14 SYMBOL 1 CLOCK 2 CLOCK 1 CLEAR 2 CLEAR 1QA to 1QD 2QA to 2QD GND Vcc NAME AND FUNCTION Clock Input Divide by 2 Section (HI……
