Philips 74HCT688
The 74HC/HCT688 are high-speed Si-gate CMOS devices and are pin compatible with low power Schottky TTL (LSTTL). They are specified in compliance with JEDEC standard no. The 74HC/HCT688 are 8-bit magnitude comparators.| Part No. | 74HCT688 |
|---|---|
| Datasheet | 74HCT688 Download |
| Manufacturer |  Philips |
| Description | 8-bit magnitude comparator |
| Buy | Stock & Price |
FEATURES
● Compare two 8-bit words● Output capability: standard
● ICC category: MSI
GENERAL DESCRIPTION
74HC/HCT688 7A. The 74HC/HCT688 are 8-bit magnitude comparators. They perform comparison of two 8-bit binary or BCD words. The output provides P = Q. QUICK REFERENCE DATA GND = 0 V; Tamb = 25 °C; tr = tf = 6 ns TYPICAL SYMBOL tPHL/ tPLH PARAMETER propagation delay Pn, Qn to P = Q E to P = Q CI CPD Notes 1. CPD is used to determine the dynamic power dissipation (PD in µW): PD = CPD × VCC2 × fi + ∑ (CL × VCC2 × fo) fi = input frequency in MHz fo = output frequency in MHz ∑ (CL × VCC2 × fo) = sum of outputs CL = output load capacitance in pF VCC = supply voltage in V 2. For HC the condition is VI = GND to VCC For HCT the condition is VI = GND to VCC − 1.5 V ORDERING INFORMATION See “74HC/HCT/HCU/HCMOS Logic Package Information”. where: input capacitance power dissipation capacitance per package notes 1 and 2 CONDITIONS HC CL = 15 pF; VCC = 5 V 17 8 3.5 30 17 12 3.5 30 ns ns pF pF HCT UNIT December 1990 2 Philips Semiconductors Product specification 8-bit magnitude comparator PINDESCRIPTION
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