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CD74HC32MG4 Equivalent & Substitute Parts
Part Overview
The CD74HC32MG4 is a 4-channel 2-input OR gate logic IC manufactured by Texas Instruments in 14-SOIC surface mount packaging. This part is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives. The 74HC32 logic family provides standard OR gate functionality across the 2V to 6V supply voltage range with propagation delays suitable for general-purpose digital logic applications.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Logic Type | OR Gate |
| Number of Circuits | 4 |
| Number of Inputs | 2 |
| Voltage Supply Range | 2V ~ 6V |
| Package Type | 14-SOIC |
| Mounting Type | Surface Mount |
| Operating Temperature Range | -55°C ~ 125°C |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitution of the CD74HC32MG4 is determined by the following criteria:
Mandatory Parameters for Direct Substitution:
- Logic Type: OR Gate (4 channels, 2 inputs per channel)
- Package: 14-SOIC surface mount
- Voltage Supply: 2V ~ 6V range
- Input/Output Logic Levels: 0.5V ~ 1.8V (Low), 1.5V ~ 4.2V (High)
Acceptable Variation Parameters:
- Propagation Delay: 13ns to 17ns @ 6V, 50pF (all variants within acceptable range)
- Quiescent Current: 1µA to 20µA (operational differences, not functional barriers)
- Operating Temperature: -40°C to -55°C minimum; 85°C to 125°C maximum (all cover standard industrial range)
- Product Status: Active or Obsolete (availability consideration, not functional)
- Packaging Format: Tube, Cut Tape, Tape & Reel (logistics only)
Non-Substitutable Variants:
- CD74HC32M (Harris Corporation, RoHS non-compliant) — compliance mismatch with ROHS3 requirement
Parameter Comparison
| Part Number | Manufacturer | Status | Voltage Supply | Quiescent Current (Max) | Propagation Delay @ 6V, 50pF | Operating Temp | Package | RoHS Status |
|---|---|---|---|---|---|---|---|---|
| CD74HC32MG4 | Texas Instruments | Discontinued | 2V ~ 6V | 2 µA | 15ns | -55°C ~ 125°C | 14-SOIC | ROHS3 |
| CD74HC32M96 | Texas Instruments | Active | 2V ~ 6V | 2 µA | 15ns | -55°C ~ 125°C | 14-SOIC | ROHS3 |
| MC74HC32ADR2G | onsemi | Active | 2V ~ 6V | 1 µA | 13ns | -55°C ~ 125°C | 14-SOIC | ROHS3 |
| 74HC32D,653 | Nexperia USA Inc. | Active | 2V ~ 6V | 2 µA | 15ns | -40°C ~ 125°C | 14-SOIC | ROHS3 |
| 74HC32D-Q100,118 | Nexperia USA Inc. | Active | 2V ~ 6V | 2 µA | 15ns | -40°C ~ 125°C | 14-SOIC | ROHS3 |
| 74HC32S14-13 | Diodes Incorporated | Active | 2V ~ 6V | 20 µA | 15ns | -40°C ~ 125°C | 14-SOIC | ROHS3 |
| MC74HC32ADG | onsemi | Active | 2V ~ 6V | 1 µA | 13ns | -55°C ~ 125°C | 14-SOIC | ROHS3 |
| MM74HC32M | Fairchild Semiconductor | Active | 2V ~ 6V | 2 µA | 17ns | -40°C ~ 85°C | 14-SOIC | Not specified |
| MM74HC32MX | Fairchild Semiconductor | Active | 2V ~ 6V | 2 µA | 17ns | -40°C ~ 85°C | 14-SOIC | Not specified |
| NLV74HC32ADG | onsemi | Obsolete | 2V ~ 6V | 1 µA | 19ns | -55°C ~ 125°C | 14-SOIC | ROHS3 |
Engineering Selection Recommendations
Preferred Substitutes (Active Status, ROHS3 Compliant):
CD74HC32M96 (Texas Instruments) — Direct parameter match to the original part. Identical electrical specifications, same manufacturer, active product status, and ROHS3 compliance. Recommended for direct replacement in new designs and existing inventory replenishment.
MC74HC32ADR2G (onsemi) — Active status with superior propagation delay (13ns vs. 15ns) and lower quiescent current (1µA vs. 2µA). Functionally equivalent with performance advantages. ROHS3 compliant and suitable for applications requiring optimized power consumption.
74HC32D,653 (Nexperia USA Inc.) — Active status with identical electrical performance to the original part. Operating temperature minimum of -40°C is acceptable for most industrial applications. ROHS3 compliant. Available in Cut Tape & Digi-Reel packaging.
74HC32D-Q100,118 (Nexperia USA Inc.) — Automotive-qualified variant (AEC-Q100) with identical electrical specifications. Suitable for applications requiring automotive-grade components. Active status and ROHS3 compliant.
Secondary Substitutes (Active Status, Acceptable Performance):
74HC32S14-13 (Diodes Incorporated) — Active status with higher quiescent current (20µA). Functionally equivalent but with increased power consumption. Suitable for non-power-critical applications. ROHS3 compliant with high inventory availability.
MC74HC32ADG (onsemi) — Active status with superior propagation delay (13ns) and lower quiescent current (1µA). Extended temperature range (-55°C to 125°C) matches original part. ROHS3 compliant. Tube packaging available.
Not Recommended:
MM74HC32M and MM74HC32MX (Fairchild Semiconductor) — Operating temperature maximum of 85°C does not cover the full -55°C to 125°C range of the original part. Suitable only for applications with restricted temperature requirements (-40°C to 85°C).
NLV74HC32ADG (onsemi) — Obsolete status limits long-term availability. Propagation delay of 19ns exceeds typical performance of active alternatives. Not recommended for new designs.
CD74HC32M (Harris Corporation) — RoHS non-compliant. Not suitable for applications requiring ROHS3 compliance.
Frequently Asked Questions (FAQ)
Q: Can I use any 74HC32 variant as a direct replacement for the CD74HC32MG4?
A: No. The substitute must maintain the 14-SOIC package, 2V to 6V supply voltage range, and ROHS3 compliance. Operating temperature range and propagation delay specifications must be verified against application requirements. The CD74HC32M (Harris) is not compatible due to RoHS non-compliance.
Q: What is the difference between Cut Tape, Tube, and Tape & Reel packaging?
A: These are logistics and handling formats only. Cut Tape (CT) & Digi-Reel, Tube, and Tape & Reel (TR) all contain the same die and electrical performance. Selection depends on assembly line equipment and volume requirements, not functional compatibility.
Q: Does the quiescent current difference between parts affect circuit operation?
A: Quiescent current (1µA to 20µA) affects power consumption but not logic function. All variants operate identically in terms of input/output logic levels and gate operation. Selection should consider total system power budget.
Q: Why do some parts have -40°C minimum operating temperature instead of -55°C?
A: Operating temperature range is a design specification. Parts rated -40°C to 125°C are suitable for industrial applications. Parts rated -55°C to 125°C provide extended low-temperature operation. Verify application requirements before selecting a part with a higher minimum temperature.
Q: Is the propagation delay difference (13ns to 19ns) significant?
A: Propagation delay affects timing margins in synchronous circuits. The original CD74HC32MG4 specifies 15ns. Substitutes with 13ns or 15ns are directly compatible. Parts with 17ns or 19ns may require timing verification in critical applications but are functionally equivalent for asynchronous logic.
Q: Can I use automotive-qualified parts (AEC-Q100) in non-automotive applications?
A: Yes. Automotive qualification indicates additional testing and reliability assurance. AEC-Q100 parts (such as 74HC32D-Q100,118) are fully compatible with standard industrial applications and provide enhanced reliability margins.
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