CD74HC85PWTE4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
CD74HC85PWTE4 is a 4-bit magnitude comparator IC in the HC High-Speed CMOS family from Texas Instruments. It compares two 4-bit binary words and provides three outputs indicating A greater than B, A equal to B, or A less than B, with cascading inputs for wider comparisons. Available from stock worldwide in a 16-pin TSSOP package suitable for high-density designs.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- CD74HC85PWTE4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -55.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 4-bit magnitude comparison with three dedicated outputs: A>B, A=B, and A<B for direct decision logic
- Cascadable design with expand inputs allowing multiple CD74HC85PWTE4 devices to compare 8-bit, 12-bit, or wider data words
- HC High-Speed CMOS family operating from 2 V to 6 V supply with 50 pF load capacitance rating for reliable switching performance
Applications
The CD74HC85PWTE4 is commonly used in digital control systems and data sorting circuits where 4-bit binary words must be compared in real time, such as address decoding and priority arbitration logic. Its cascadable inputs make it straightforward to extend comparisons to 8, 12, or 16 bits by chaining multiple devices together without additional glue logic. The TSSOP-16 package and HC CMOS technology also make it a good fit for microcontroller peripheral boards and programmable logic replacement designs operating from 2 V to 6 V rails.
Specifications
| YTEOL | 0 |
| Additional Feature | CASCADABLE, THREE POSSIBLE OUTPUTS ARE A B |
| Family | HC/UH |
| JESD-30 Code | R-PDSO-G16 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | MAGNITUDE COMPARATOR |
| Max I(ol) | 0.0052A |
| Number of Bits | 4 |
| Number of Functions | 1 |
| Output Polarity | TRUE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP16,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | 260 |
| Power Supply Current-Max (ICC) | 0.08mA |
| Prop. Delay@Nom-Sup | 42ns |
| Propagation Delay (tpd) | 295ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 6V |
| Supply Voltage-Min (Vsup) | 2V |
| Supply Voltage-Nom (Vsup) | 4.5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | MILITARY |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| 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 |
| Country of Origin | Malaysia |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How many bits can the CD74HC85PWTE4 compare, and can it be expanded to handle wider data words?
The CD74HC85PWTE4 compares two 4-bit binary words and provides three magnitude outputs. By connecting the cascading inputs of multiple devices, designers can build 8-bit, 12-bit, or 16-bit comparators without additional glue logic, simply by chaining the A>B, A=B, and A<B outputs of one stage into the expand inputs of the next.
What supply voltage range and load capacitance does the CD74HC85PWTE4 support?
The CD74HC85PWTE4 operates from a supply voltage of 2 V to 6 V, covering 3.3 V and 5 V logic systems. It is characterized at a load capacitance of 50 pF, and its maximum output low current (I_OL) is 5.2 mA, ensuring compatibility with standard CMOS and TTL-input logic families.
In which digital design scenarios is the CD74HC85PWTE4 preferred over using a microcontroller for comparison?
When deterministic, glue-logic-level latency is required for address decoding, key-code matching, or position feedback comparison in servo systems, the CD74HC85PWTE4 performs the 4-bit magnitude compare in nanoseconds without software overhead. This is especially valuable in FPGA prototype boards and legacy TTL-compatible designs where a dedicated comparator reduces firmware complexity and ensures cycle-accurate timing.
What package does the CD74HC85PWTE4 use and how does it affect board density?
The CD74HC85PWTE4 is housed in a 16-pin TSSOP (PDSO-G16) package with a 0.65 mm lead pitch, occupying roughly 5 mm x 4.4 mm of PCB area. This small footprint is significantly more board-efficient than a DIP-16 equivalent, making it suitable for high-density SMT assemblies and multi-layer PCB designs with 4-layer or more stackups.
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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.
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