CD74HC688MG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
Texas Instruments CD74HC688MG4 is a high-speed CMOS 8-bit identity and magnitude comparator with cascadable architecture and inverted active-low output. Handles 50pF load capacitance in HC-family logic with wide 2V to 6V supply range in a 20-pin SOIC package. Available with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 20
- Lifecycle
- OBSOLETE
- Datasheet
- CD74HC688MG4 Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.6164(MOQ 1)
- Temp Range
- -55.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of CD74HC688MG4?
- 8-bit magnitude comparator with cascadable design enables expansion to wider bus widths (16-bit, 32-bit) without external glue logic
- Inverted (active-low) output enables easy wiring to enable and select lines in address decoding and bus arbitration circuits
- HC/UH CMOS family provides high-speed operation with low quiescent current across 2V to 6V supply range
- Single 8-bit function in a 20-pin SOIC simplifies address comparison in embedded and microprocessor bus systems
What is CD74HC688MG4 used for?
The CD74HC688MG4 is commonly used for address decoding in microprocessor and microcontroller systems, where it compares an 8-bit address bus word against a fixed reference to generate chip-select signals. Its cascadable architecture enables construction of 16-bit or wider comparators for memory bank selection and I/O port decoding in embedded designs. The device also fits FPGA prototyping boards, PLC systems, and digital logic education hardware where high-speed 8-bit magnitude comparison is needed.
What are the specifications of CD74HC688MG4?
| YTEOL | 0 |
| Additional Feature | CASCADABLE |
| Family | HC/UH |
| JESD-30 Code | R-PDSO-G20 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | MAGNITUDE COMPARATOR |
| Number of Bits | 8 |
| Number of Functions | 1 |
| Output Polarity | INVERTED |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP20,.4 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Packing Method | TUBE |
| Peak Reflow Temperature (Cel) | 260 |
| Power Supply Current-Max (ICC) | 50mA |
| Propagation Delay (tpd) | 255ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 6V |
| Supply Voltage-Min (Vsup) | 2V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | MILITARY |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| HTS Code | 8542.39.00.60 |
Where can I find the CD74HC688MG4 datasheet?
CD74HC688MG4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for CD74HC688MG4?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What does the CD74HC688MG4 do?
The CD74HC688MG4 is an 8-bit identity and magnitude comparator. It compares two 8-bit binary words (P and Q inputs) and asserts an active-low output (P=Q) when both words are identical. This makes it useful for address decoding, chip-select generation, and bus arbitration logic.
Can the CD74HC688MG4 be cascaded for wider comparisons?
Yes, the CD74HC688MG4 is designed to be cascadable. Multiple devices can be connected in series to perform 16-bit, 24-bit, or wider address or data comparisons, allowing designers to scale the comparison width without additional logic gates.
What is the output polarity of the CD74HC688MG4?
The CD74HC688MG4 has an inverted (active-low) output. The P=Q output goes LOW when the two 8-bit input words match, making it directly compatible with active-low chip-enable and address strobe signals common in memory and peripheral interfaces.
What logic family and supply voltage does the CD74HC688MG4 use?
The CD74HC688MG4 belongs to the HC/UH high-speed CMOS logic family and operates from a supply voltage of 2V to 6V. HC-family devices offer fast propagation delays, low power consumption, and compatibility with both LVTTL and CMOS logic levels.
What package does the CD74HC688MG4 come in?
The CD74HC688MG4 is available in a 20-pin SOIC (R-PDSO-G20) surface-mount package. This standard package is supported by most PCB assembly processes and offers a good balance of pin density and ease of hand soldering or rework during prototyping.
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Why Buy from FindMyChip
About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
More from Texas Instruments
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $1.4793 | $1.48 |
| 57+ | $0.6903 | $39.35 |
| 291+ | $0.6164 | $179.37 |
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