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CD74HC85PWR Equivalent & Substitute Parts
Part Overview
The CD74HC85PWR is a 4-bit magnitude comparator manufactured by Texas Instruments, designed for logic-level comparison applications. This active high output device compares two 4-bit binary words and provides three output functions: A<B, A=B, and A>B. The part is currently in active production status with 4215 units in stock. Substitute parts are identified when equivalent electrical performance, package compatibility, and functional specifications align with the original design requirements.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | CD74HC85PWR |
| Manufacturer | Texas Instruments |
| Category | Logic |
| Type | Magnitude Comparator |
| Number of Bits | 4 |
| Output Type | Active High |
| Output Functions | A<B, A=B, A>B |
| Voltage Supply Range | 2V to 6V |
| Output Current (High/Low) | 5.2mA / 5.2mA |
| Max Propagation Delay | 33ns @ 6V, 50pF |
| Quiescent Current | 8 µA |
| Operating Temperature Range | -55°C to 125°C |
| Package | 16-TSSOP (0.173", 4.40mm Width) |
| Mounting Type | Surface Mount |
| Series | 74HC |
| RoHS Status | ROHS3 Compliant |
| MSL Rating | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution eligibility for the CD74HC85PWR is determined by strict alignment of the following critical parameters:
- Functional equivalence: 4-bit magnitude comparator with identical output functions (A<B, A=B, A>B)
- Electrical specifications: Supply voltage range 2V to 6V, output current ratings 5.2mA, propagation delay 33ns @ 6V/50pF
- Package compatibility: 16-TSSOP surface mount package with identical physical dimensions
- Series classification: 74HC logic family
- Compliance certifications: ROHS3 compliance and MSL Level 1 rating
The substitute part 74HC85PW,118 manufactured by Nexperia USA Inc. meets all these criteria and is classified as a manufacturer-recommended equivalent.
Parameter Comparison
| Parameter | CD74HC85PWR (TI) | 74HC85PW,118 (Nexperia) | Match Status |
|---|---|---|---|
| Type | Magnitude Comparator | Magnitude Comparator | Equivalent |
| Number of Bits | 4 | 4 | Equivalent |
| Output Type | Active High | Active High | Equivalent |
| Output Functions | A<B, A=B, A>B | A<B, A=B, A>B | Equivalent |
| Voltage Supply Range | 2V to 6V | 2V to 6V | Equivalent |
| Output Current (High/Low) | 5.2mA / 5.2mA | 5.2mA / 5.2mA | Equivalent |
| Max Propagation Delay | 33ns @ 6V, 50pF | 33ns @ 6V, 50pF | Equivalent |
| Quiescent Current | 8 µA | 8 µA | Equivalent |
| Operating Temperature Range | -55°C to 125°C | -40°C to 125°C | Partial Match |
| Package | 16-TSSOP | 16-TSSOP | Equivalent |
| Mounting Type | Surface Mount | Surface Mount | Equivalent |
| Series | 74HC | 74HC | Equivalent |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | Equivalent |
| MSL Rating | 1 (Unlimited) | 1 (Unlimited) | Equivalent |
Engineering Selection Recommendations
The 74HC85PW,118 from Nexperia USA Inc. is a direct functional equivalent to the CD74HC85PWR. Both parts maintain identical electrical performance specifications, package geometry, and compliance certifications. The operating temperature range of the Nexperia part extends to -40°C minimum versus -55°C for the Texas Instruments version; this difference is relevant only for applications requiring operation below -40°C. Both parts carry ROHS3 compliance and MSL Level 1 ratings, confirming equivalent environmental and handling requirements. Selection between these parts should be based on availability, lead time, and application-specific temperature requirements.
Frequently Asked Questions (FAQ)
Q: Can the 74HC85PW,118 be used as a direct replacement for the CD74HC85PWR?
A: Yes, the 74HC85PW,118 is functionally equivalent for applications operating within the -40°C to 125°C temperature range. Both parts share identical electrical specifications, output functions, and 16-TSSOP package dimensions.
Q: What is the key difference between these two parts?
A: The primary difference is the minimum operating temperature. The CD74HC85PWR operates from -55°C to 125°C, while the 74HC85PW,118 operates from -40°C to 125°C. All other electrical and mechanical parameters are identical.
Q: Are both parts RoHS compliant?
A: Yes, both the CD74HC85PWR and 74HC85PW,118 are ROHS3 compliant and carry MSL Level 1 ratings.
Q: Do these parts use the same package?
A: Yes, both parts use the 16-TSSOP surface mount package with identical physical dimensions (0.173" width, 4.40mm).
Q: What output functions does this magnitude comparator provide?
A: The comparator provides three output functions: A<B (A less than B), A=B (A equal to B), and A>B (A greater than B), all with active high output logic.
Q: What is the supply voltage range for these parts?
A: Both parts operate with a supply voltage range of 2V to 6V.
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