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TC74AC520

Toshiba Semiconductor
Part Number TC74AC520
Manufacturer Toshiba Semiconductor
Description CMOS 8-BIT DIGITAL COMPARATORS
Published Jul 7, 2015
Detailed Description TOSHIBA TC74AC Series TC74AC520 TC74AC521 Features: • High Speed: tpd = 6.4ns (typ.) at VCC = 5V • Low Power Dissipati...
Datasheet PDF File TC74AC520 PDF File

TC74AC520
TC74AC520

Overview
TOSHIBA TC74AC Series TC74AC520 TC74AC521 Features: • High Speed: tpd = 6.
4ns (typ.
) at VCC = 5V • Low Power Dissipation: ICC = 8µA (max.
) at Ta = 25°C* • High Noise Immunity: VNIH = VNIL = 28% VCC (min.
) • Symmetrical Output Impedance: ƒIOHƒ = IOL = 24mA (min.
).
Capability of driving 50Ω transmission lines.
• Balanced Propagation Delays: tpLH = tpHL • Wide Operating Voltage Range: VCC (opr) = 2V~5.
5V • Pin and Function Compatible with 74F521 • Available in DIP, SOIC and SOP Packages * for AC521 only Pin Assignment G1 P0 2 Q0 3 P1 4 Q1 5 P2 6 Q2 7 P3 8 Q3 9 GND 10 20 VCC 19 P=Q 18 Q7 17 P7 16 Q6 15 P6 14 Q5 13 P5 12 Q4 11 P4 (TOP VIEW) Truth Table INPUTS P, Q P=Q P≠Q X G L L H X: Don’t Care OUTPUT P=Q L H H 520: with Pull-up Resistor The TC74AC520 and TC74AC521 are advanced high speed CMOS 8-BIT DIGITAL COMPARATORS fabricated with silicon gate and double-layer metal wiring C2MOS technology.
They achieve the high speed operation similar to equivalent Bipolar Schottky TTL, while maintaining the CMOS low power dissipation.
They compare two 8-bit binary or BCD words applied inputs P0~P7, and inputs Q0~Q7, and indicate whether or not they are equal.
The TC74AC520 is equipped with pull-up resistors (20Ω typ.
) to inputs Q0~Q7 and features pull-up resistors on the Q inputs for switch data.
A signal active low enable is provided to facilitate cascading of several packages to compare words greater than 8 bits.
All inputs are equipped with protection circuits against static discharge or transient excess voltage.
IEC Logic Symbol (1) COMP G EN (2) P0 0 (4) P1 (6) P2 (8) P3 (11) P4 P (13) P5 (15) P6 P7 (17) 7 (19) P=Q P=Q (3) Q0 0 (5) Q1 (7) Q2 (9) Q3 (12) Q4 Q (14) Q5 (16) Q6 Q7 (18) 7 The information contained here is subject to change without notice.
The information contained herein is presented only as guide for the applications of our products.
No responsibility is assumed by TOSHIBA for any infringements of patents or other rights of the...


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