器件名称:
M74HC298M1R
功能描述:
QUAD 2 CHANNEL MULTIPLEXER/REGISTER
文件大小:
253.87KB 共11页
简 介:
M74HC298 QUAD 2 CHANNEL MULTIPLEXER/REGISTER 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 298 DIP SOP TSSOP ORDER CODES PACKAGE DIP SOP TSSOP TUBE M74HC298B1R M74HC298M1R T&R M74HC298RM13TR M74HC298TTR DESCRIPTION The M74HC298 is an high speed CMOS QUAD 2 CHANNEL MULTIPLEXER/REGISTER fabricated with silicon gate C2MOS technology. These circuits are controlled by the signals WORD SELECT and CLOCK. When the WORD SELECT input is taken low Word 1 (A1, B1, C1 and D1) is presented to the input of the flip-flops, and when WORD SELECT is high Word 2 (A2, B2, C2 and D2) is presented to the inputs of the flip-flops. The select word is clocked to the output terminals on the negative edge of the clock pulse. All inputs are equipped with protection circuits against static discharge and transient excess voltage. PIN CONNECTION AND IEC LOGIC SYMBOLS July 2001 1/11 M74HC298 INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION PIN No 1, 2, 5, 6 3, 4, 7, 9 12 to 15 10 11 8 16 SYMBOL A2, B2, C2, D2 A1, B1, C1, D1 QA to QD WORD SELECT CLOCK GND VCC NAME AND FUNCTION Word 2 Data Inputs Word 1 Data Inputs Outputs Word Select Input Clock Input (LOW to HIGH, Edge-triggered) Ground (0V)……
