CD74HC85PWE4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The CD74HC85PWE4 is a high-speed CMOS 4-bit magnitude comparator from Texas Instruments in the HC/UH logic family, comparing two 4-bit binary words and providing A>B, A=B, and A<B outputs with cascadable inputs for multi-bit expansion. Operates at standard CMOS supply voltages with 50pF load capacitance in a 16-pin TSSOP package. Available with RoHS compliance, competitive pricing, and worldwide in-stock distribution.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- CD74HC85PWE4 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 simultaneous outputs (A>B, A=B, A<B) enables complete binary word comparison in a single IC
- Cascadable cascade inputs allow expansion to 8-bit, 16-bit, and larger magnitude comparators by connecting multiple CD74HC85 devices in series
- High-speed CMOS HC/UH family with 50pF load capacitance supports fast digital logic comparison in synchronous digital systems
- 16-pin TSSOP small outline package (JEDEC R-PDSO-G16) with RoHS-compliant lead-free construction for modern SMT PCB assembly
Applications
The CD74HC85PWE4 is used in digital control systems, microprocessor address decoding, and arithmetic logic units where binary magnitude comparison of 4-bit words is required. Its cascadable inputs allow designers to chain multiple comparators for 8-bit, 12-bit, or 16-bit comparisons in sorting networks, range detectors, and priority encoders. The device is also applied in programmable logic, hardware counters with threshold detection, and FPGA replacement circuits requiring discrete glue logic for address or data range comparison.
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 | TUBE |
| 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
What comparison functions does the CD74HC85PWE4 perform?
The CD74HC85PWE4 compares two 4-bit binary input words (A3-A0 and B3-B0) and asserts one of three mutually exclusive outputs: A greater than B, A equal to B, or A less than B. All three outputs are driven simultaneously, making it easy to interface with priority logic, mux selection circuits, and conditional branching hardware in digital systems.
How does the cascading feature work on the CD74HC85PWE4?
The CD74HC85PWE4 provides three cascade input pins (I(A>B), I(A=B), I(A<B)) that accept the comparison outputs from a lower-order comparator stage. By connecting cascade outputs of one device to the cascade inputs of the next, designers can build 8-bit, 12-bit, or wider magnitude comparators without additional logic gates, enabling scalable digital comparison chains with propagation delay determined by the number of cascaded stages.
What logic family and supply voltage range is the CD74HC85PWE4?
The CD74HC85PWE4 belongs to the HC/UH (high-speed CMOS) logic family, which operates across a supply voltage range of 2V to 6V. This wide range makes it compatible with both 3.3V and 5V digital systems. The HC family provides CMOS-level output swings, moderate speed (typically 7ns propagation delay at 5V), and low static power consumption compared to TTL-compatible logic families.
What package does the CD74HC85PWE4 use and what does the E4 suffix mean?
The CD74HC85PWE4 is packaged in a 16-pin TSSOP (Thin Shrink Small Outline Package) with JEDEC code R-PDSO-G16. The E4 suffix in Texas Instruments' naming indicates the device is RoHS compliant (lead-free) and uses a green, halogen-free package material (JESD-609 e4 code). The TSSOP16 package offers a compact SMT footprint suitable for high-density PCB designs.
What are typical applications for the CD74HC85PWE4 and what are pin-compatible alternatives?
The CD74HC85PWE4 is used in address decoding, range detection circuits, hardware sorting networks, and digital control comparators in embedded systems and PLCs. Pin-compatible and functionally equivalent alternatives include the SN74HC85 (also from Texas Instruments in different package variants), the 74HC85 from NXP, and the MM74HC85 from ON Semiconductor. The CD74HC85 is specifically the CMOS logic version with HC-family timing characteristics, as opposed to the older 74LS85 TTL equivalent.
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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.
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