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TC74AC520 Dataheets PDF



Part Number TC74AC520
Manufacturers Toshiba Semiconductor
Logo Toshiba Semiconductor
Description CMOS 8-BIT DIGITAL COMPARATORS
Datasheet TC74AC520 DatasheetTC74AC520 Datasheet (PDF)

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 AC5.

  TC74AC520   TC74AC520



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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 third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of TOSHIBA or others. These TOSHIBA products are intended for usage in general electronic equipments (office equipment, communication equipment, measuring equipment, domestic electrification, etc.) Please make sure that you consult with us before you use these TOSHIBA products in equipments which require high quality and/or reliability, and in equipments which could have major impact to the welfare of human life (atomic energy control, spaceship, traffic signal, combustion control, all types of safety devices, etc.). TOSHIBA cannot accept liability to any damage which may occur in case these TOSHIBA products were used in the mentioned equipments without prior consultation with TOSHIBA. TOSHIBA CORPORATION 1/3 TC74AC520 TC74AC521 Absolute Maximum Ratings PARAMETER Supply Voltage Range DC Input Voltage DC Output Voltage Input Diode Current Output Diode Curre.


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