器件名称:
M74HC4520M1R
功能描述:
DUAL 4 BIT BINARY COUNTER
文件大小:
361KB 共12页
简 介:
M74HC4520 DUAL 4 BIT BINARY COUNTER s s s s s s s HIGH SPEED : fMAX = 60 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 4520 DIP SOP TSSOP ORDER CODES PACKAGE DIP SOP TSSOP TUBE M74HC4520B1R M74HC4520M1R T&R M74HC4520RM13TR M74HC4520TTR DESCRIPTION The M74HC4520 is an high speed CMOS DUAL BINARY COUNTER fabricated with silicon gate C2MOS technology. It consists of two identical internally synchronous 4-stage counters. The counter stages are D-TYPE flip-flops having interchangeable CLOCK and ENABLE inputs for incrementing on either the positive-going or negative-going transition. For single-unit operation the ENABLE input is maintained "high" and the counter advances on each positive-going transition of the CLOCK. The counters are cleared by high levels on their clear lines. The counter can be cascaded in the ripple mode by connecting Q4 to the enable input of the subsequent counter while the clock input of the latter is held permanently low. All inputs are equipped with protection circuits against static discharge and transient excess voltage. PIN CONNECTION AND IEC LOGIC SYMBOLS July 2001 1/12 M74HC4520 INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION PIN No 1, 9 2, 10 3, 4, 5, 6 7, 15 11, 12, 1……
