M74HC688TTR: Detailed Product Information

Product Overview

The M74HC688TTR is a high-speed CMOS 8-bit equality comparator designed to compare two 8-bit words applied on inputs P0-P7 and Q0-Q7. It indicates whether the words are equal or not, making it suitable for applications requiring fast and efficient data comparison.

Key Features

• High-Speed Operation: Propagation delay of 17 ns (typical) at VCC = 6V.
• Low Power Dissipation: ICC = 4 μA (max.) at TA = 25°C.
• High Noise Immunity: VNIH = VNIL = 28% VCC (min.).
• Symmetrical Output Impedance: |IOH| = IOL = 4 mA (min.).
• Balanced Propagation Delays: tPLH ≅ tPHL.
• Wide Operating Voltage Range: VCC (OPR) = 2V to 6V.
• Pin and Function Compatibility: Compatible with 74 series 688.
• Packaging: TSSOP (Thin Small Outline Package).

Specifications

• Supply Voltage (VCC): 2V to 6V
• Input Voltage (VI): 0 to VCC
• Output Voltage (VO): 0 to VCC
• Operating Temperature (Top): -55°C to 125°C
• Input Rise and Fall Time (tr, tf):VCC = 2.0V: 0 to 1000 nsVCC = 4.5V: 0 to 500 nsVCC = 6.0V: 0 to 400 ns

Electrical Characteristics

• High Level Input Voltage (VIH):VCC = 2.0V: 1.5V (min.), 2.0V (max.)VCC = 4.5V: 3.15V (min.), 4.5V (max.)VCC = 6.0V: 4.2V (min.), 6.0V (max.)
• Low Level Input Voltage (VIL):VCC = 2.0V: 0.5V (max.)VCC = 4.5V: 1.35V (max.)VCC = 6.0V: 1.8V (max.)
• High Level Output Voltage (VOH):VCC = 2.0V: 1.9V (min.), 2.0V (max.)VCC = 4.5V: 4.4V (min.), 4.5V (max.)VCC = 6.0V: 5.9V (min.), 6.0V (max.)
• Low Level Output Voltage (VOL):VCC = 2.0V: 0.1V (max.)VCC = 4.5V: 0.1V (max.)VCC = 6.0V: 0.1V (max.)
• Input Leakage Current (II): ± 0.1 µA (max.) at VI = VCC or GND
• Quiescent Supply Current (ICC): 4 µA (max.) at VCC = 6.0V

AC Electrical Characteristics (CL = 50pF, Input Rise/Fall Time = 6ns)

• Output Transition Time (tTLH, tTHL):VCC = 2.0V: 75 ns (min.), 110 ns (max.)VCC = 4.5V: 15 ns (min.), 22 ns (max.)VCC = 6.0V: 13 ns (min.), 19 ns (max.)
• Propagation Delay Time (tPLH, tPHL):VCC = 2.0V: 170 ns (min.), 255 ns (max.)VCC = 4.5V: 34 ns (min.), 51 ns (max.)VCC = 6.0V: 29 ns (min.), 43 ns (max.)

Mechanical Data

• Package Type: TSSOP (Thin Small Outline Package)
• Dimensions:A: 1.2 mm (min.), 1.05 mm (max.)A1: 0.05 mm (min.), 0.15 mm (max.)A2: 0.8 mm (min.), 1.0 mm (max.)b: 0.19 mm (min.), 0.30 mm (max.)c: 0.09 mm (min.), 0.20 mm (max.)D: 6.4 mm (min.), 6.6 mm (max.)E: 6.2 mm (min.), 6.6 mm (max.)E1: 4.3 mm (min.), 4.48 mm (max.)e: 0.65 mm (BSC)K: 0° to 8°L: 0.45 mm (min.), 0.75 mm (max.)

Ordering Information

• Part Number: M74HC688TTR
• Package: TSSOP
• Speed: 17 ns (typical) at VCC = 6V
• Temperature Range: Industrial (-55°C to 125°C)

Important Notes

• Absolute Maximum Ratings: Values beyond these may cause permanent damage to the device.
• Storage Temperature (Tstg): -65°C to +150°C
• Lead Temperature (TL): 300°C (10 sec)
• Power Dissipation (PD): 500 mW at 65°C; derate to 300 mW by 10 mW/°C from 65°C to 85°C