74688 8-bit Magnitude Comparator 5V IC DIP-20
The 74688 is a digital magnitude comparator IC used to compare two binary data values and determine whether they are equal, making it useful in digital control, data checking, and logic circuits.
36.00 EGP
In stockSKU 4241743574175
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74688 8-bit Magnitude Comparator 5V IC DIP-20
The 74688 is part of the 74-series digital logic family and is commonly associated with an 8-bit equality comparator. It compares two sets of binary inputs and provides an output indicating whether the values match. This function is useful in systems that need to recognize a particular binary code or check whether two data words are identical.
The IC is suitable for digital logic systems, address recognition, data verification, and control circuits. It is commonly supplied in a through-hole DIP package for use in prototyping and PCB assembly. Note that the standard 74×688 is generally an equality comparator rather than a full greater-than/equal-to/less-than magnitude comparator, so the exact device marking and datasheet should be verified before listing or designing with it.
Features:
- Designed to Perform Comparisons Between Two 8-bit Binary or BCD Words.
- Totem Pole Output.
- Provides Equal Comparison Result.
- Operating Temperature up to 70oC.
- Standard TTL Switching Voltages.
- VCC Supply Voltage 5.0V.
- TA Operating Ambient Temperature Range 0-70°C.
- IOH Output Current — High –0.4mA.
- IOL Output Current — Low 24mA.
Specifications:
| Parameter | Description |
|---|---|
| IC Number | 74688 |
| IC Type | 8-Bit Equality Comparator |
| Number of Bits | 8 |
| Inputs | Two 8-bit binary words (P and Q) |
| Enable Input | Active-low |
| Output | Active-low equality output (P = Q) |
| Output Behavior | Goes LOW when both words are equal and enable is active |
| Logic Family | 74-series; depends on manufacturer suffix |
| Nominal Supply Voltage | 5V |
| Supply Voltage Range | 4.5–5.5V for common 74LS/HCT variants; 2–6V for 74HC variants |
| Package Type | DIP-20 |
| Mounting Type | Through-hole |
| Operating Temperature | Depends on the exact variant |
Pinout:
| Pin | Symbol | Description |
|---|---|---|
| 1 | E | enable (active low) |
| 2 | P0 | word input |
| 3 | Q0 | word input |
| 4 | P1 | word input |
| 5 | Q1 | word input |
| 6 | P2 | word input |
| 7 | Q2 | word input |
| 8 | P3 | word input |
| 9 | Q3 | word input |
| 10 | GND | ground |
| 11 | P4 | word input |
| 12 | Q4 | word input |
| 13 | P5 | word input |
| 14 | Q5 | word input |
| 15 | P6 | word input |
| 16 | Q6 | word input |
| 17 | P7 | word input |
| 18 | Q7 | word input |
| 19 | P=Q | equal-to output (low when P = Q) |
| 20 | Vcc | supply voltage |
Applications:
- Binary data comparison.
- Digital address decoding.
- Memory block selection.
- Digital code recognition.
- Data validation and checking.
- Microprocessor and digital bus interfaces.
- Cascaded equality comparison circuits.
Packages Included:
- 1 × 74688 8-bit Magnitude Comparator 5V IC DIP-20.
Documents:
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