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M74HCT688 Datasheet(PDF) 1 Page - STMicroelectronics |
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M74HCT688 Datasheet(HTML) 1 Page - STMicroelectronics |
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1 / 10 page  M54HCT688 M74HCT688 February 1993 8 BIT EQUALITY COMPARATOR B1R (Plastic Package) ORDER CODES : M54HCT688F1R M74HCT688M1R M74HCT688B1R M74HCT688C1R F1R (Ceramic Package) M1R (Micro Package) C1R (Chip Carrier) PIN CONNECTIONS (top view) NC = No Internal Connection DESCRIPTION . HIGH SPEED tPD = 17 ns (TYP.) AT VCC =5 V . LOW POWER DISSIPATION ICC =4 µA (MAX.) AT TA =25 °C . COMPATIBLE WITH TTL OUTPUTS VIH = 2V (MIN.) VIL = 0.8V (MAX) . OUTPUT DRIVE CAPABILITY 10 LSTTL LOADS . SYMMETRICAL OUTPUT IMPEDANCE |IOH| = IOL = 4 mA (MIN.) . BALANCED PROPAGATION DELAYS tPLH =tPHL . PIN AND FUNCTION COMPATIBLE WITH 54/74LS688 The M54/74HCT688 utilizes silicon gate C 2MOS technology to achieve operating speeds equivalent to LSTTL devices. Along with the low power dissipation and high noise immunity of standard C 2MOS integrated circuit, it possesses the driving capability of 10 LSTTL load. The M54/74HCT688 compares bit for bit two 8-bit words applied on inputs P0 - P7 and inputs Q0 - Q7 and indicates whether or not they are equal. A single active low enable is provided to facilitate cascading several packages to enable comparison of words greater than 8 bits. This integrated circuit has input and output characteristics that are fully compatible with 54/74 LSTTL logic families. M54/74HCT devices are designed to directly interface HSC 2MOS systems with TTL and NMOS components. They are also plug in replacements for LSTTL devices giving a reduction of power consumption. All inputs are equipped with protection circuit against static discharge and transient excess voltage. 1/10 |
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