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74HC595DG Equivalent & Substitute Parts
Part Overview
The 74HC595DG is an 8-bit shift register with tri-state output manufactured by onsemi in a 16-SOIC surface mount package. This component functions as a serial-to-parallel converter, commonly used in digital logic applications for output expansion and data serialization. The 74HC595DG is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. Substitute parts must maintain identical functional characteristics, electrical parameters, and package compatibility to ensure direct replacement capability.
Substiute Parts
Key Parameters
| Parameter | Specification |
|---|---|
| Logic Type | Shift Register |
| Output Type | Tri-State |
| Number of Elements | 1 |
| Number of Bits per Element | 8 |
| Function | Serial to Parallel, Serial |
| Voltage Supply Range | 2V ~ 6V |
| Operating Temperature Range | -55°C ~ 125°C |
| Mounting Type | Surface Mount |
| Package / Case | 16-SOIC (0.154", 3.90mm Width) |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| REACH Status | REACH Unaffected |
Substitute Part Grouping Explanation
Substitution of the 74HC595DG is determined by strict adherence to the following parameters:
Critical Parameters for Direct Substitution:
- Logic Type: Shift Register
- Output Type: Tri-State
- Number of Elements: 1
- Number of Bits per Element: 8
- Function: Serial to Parallel, Serial
- Voltage Supply Range: 2V ~ 6V
- Package / Case: 16-SOIC (0.154", 3.90mm Width)
- Mounting Type: Surface Mount
Acceptable Variations:
- Operating Temperature Range: May extend beyond -55°C ~ 125°C (wider ranges are acceptable)
- Product Status: Active parts are preferred over obsolete parts
- Packaging Format: Tube, Cut Tape (CT), or Tape & Reel (TR) are interchangeable for component functionality
- Manufacturer: Multiple manufacturers produce compatible 74HC595 variants
Non-Substitutable Parameters:
- Base Product Number must remain 74HC595 (parametric equivalents with different base numbers such as 74HC4094 are listed separately)
- Package width tolerance: 16-SOIC with 0.295" width variants are noted as dimensional variants
Parameter Comparison
| Part Number | Manufacturer | Product Status | Voltage Supply | Operating Temp | Package / Case | RoHS Status |
|---|---|---|---|---|---|---|
| 74HC595DG | onsemi | Obsolete | 2V ~ 6V | -55°C ~ 125°C | 16-SOIC (0.154", 3.90mm) | Not specified |
| MC74HC595ADG | onsemi | Active | 2V ~ 6V | -55°C ~ 125°C | 16-SOIC (0.154", 3.90mm) | ROHS3 Compliant |
| MM74HC595M | onsemi | Active | 2V ~ 6V | -40°C ~ 85°C | 16-SOIC (0.154", 3.90mm) | ROHS3 Compliant |
| MM74HC595MX | onsemi | Active | 2V ~ 6V | -40°C ~ 85°C | 16-SOIC (0.154", 3.90mm) | ROHS3 Compliant |
| 74HC595D,118 | Nexperia USA Inc. | Active | 2V ~ 6V | -40°C ~ 125°C | 16-SOIC (0.154", 3.90mm) | ROHS3 Compliant |
| 74HC595D-Q100,118 | Nexperia USA Inc. | Active | 2V ~ 6V | -40°C ~ 125°C | 16-SOIC (0.154", 3.90mm) | ROHS3 Compliant |
| CD74HC595DW | Texas Instruments | Last Time Buy | 2V ~ 6V | -55°C ~ 125°C | 16-SOIC (0.295", 7.50mm) | ROHS3 Compliant |
| CD74HC595DWR | Texas Instruments | Active | 2V ~ 6V | -55°C ~ 125°C | 16-SOIC (0.295", 7.50mm) | ROHS3 Compliant |
| CD74HC595M96 | Texas Instruments | Active | 2V ~ 6V | -55°C ~ 125°C | 16-SOIC (0.154", 3.90mm) | ROHS3 Compliant |
| CD74HC595MT | Texas Instruments | Obsolete | 2V ~ 6V | -55°C ~ 125°C | 16-SOIC (0.154", 3.90mm) | ROHS3 Compliant |
| MC74HC4094ADG | onsemi | Obsolete | 2V ~ 6V | -55°C ~ 125°C | 16-SOIC (0.154", 3.90mm) | ROHS3 Compliant |
Engineering Selection Recommendations
Primary Substitutes (Direct Replacement - Identical Parameters):
MC74HC595ADG and CD74HC595M96 are the preferred direct substitutes for 74HC595DG. Both maintain the full operating temperature range of -55°C ~ 125°C, the 2V ~ 6V supply voltage specification, and the 16-SOIC (0.154", 3.90mm) package. MC74HC595ADG is manufactured by onsemi (original manufacturer) and carries ROHS3 compliance. CD74HC595M96 is manufactured by Texas Instruments and is actively produced, ensuring long-term availability.
Secondary Substitutes (Compatible with Temperature Derating):
MM74HC595M and MM74HC595MX are active onsemi products with ROHS3 compliance. These parts operate within -40°C ~ 85°C, which represents a narrower temperature range than the original specification. Selection of these parts is appropriate for applications where the operating environment remains within -40°C ~ 85°C.
Nexperia Alternatives (Extended Temperature Coverage):
74HC595D,118 and 74HC595D-Q100,118 are manufactured by Nexperia USA Inc. and are actively produced. Both support the -40°C ~ 125°C operating range, providing extended high-temperature capability. The 74HC595D-Q100,118 variant includes AEC-Q100 automotive qualification, suitable for automotive-grade applications.
Package Dimension Consideration:
CD74HC595DW and CD74HC595DWR are Texas Instruments products with a wider 16-SOIC package (0.295", 7.50mm width) compared to the standard 0.154" width. These parts are functionally equivalent but require PCB layout verification due to package width differences. CD74HC595DWR is actively produced; CD74HC595DW is Last Time Buy status.
Parametric Equivalent (Different Base Product Number):
MC74HC4094ADG is a parametric equivalent with identical electrical and functional characteristics but uses a different base product number (74HC4094 instead of 74HC595). This part is obsolete and should be selected only when 74HC595 variants are unavailable and circuit design permits functional substitution.
Frequently Asked Questions (FAQ)
Q: Can I use MM74HC595M as a direct replacement for 74HC595DG?
A: MM74HC595M is functionally compatible but operates within -40°C ~ 85°C instead of -55°C ~ 125°C. It is suitable for applications where the operating environment remains within this narrower range. For applications requiring the full -55°C ~ 125°C specification, use MC74HC595ADG or CD74HC595M96.
Q: What is the difference between CD74HC595DW and CD74HC595DWR?
A: Both are Texas Instruments 74HC595 shift registers with identical electrical specifications. The primary difference is packaging format: CD74HC595DW is supplied in Tube format and is Last Time Buy status, while CD74HC595DWR is supplied in Cut Tape (CT) format and is actively produced. The package case width is 0.295" (7.50mm) for both, which differs from the standard 0.154" width.
Q: Is MC74HC4094ADG a suitable substitute for 74HC595DG?
A: MC74HC4094ADG is a parametric equivalent with the same electrical characteristics and package, but it is a different product line (74HC4094 instead of 74HC595). It should only be selected if 74HC595 variants are unavailable and the circuit design permits functional substitution. Both are currently obsolete.
Q: Which substitute offers the best long-term availability?
A: CD74HC595M96 (Texas Instruments) and 74HC595D,118 (Nexperia) are both actively produced and offer the best long-term procurement continuity. MC74HC595ADG (onsemi) is also active and maintains the original manufacturer relationship.
Q: Do all substitutes have the same package footprint?
A: Most substitutes use the standard 16-SOIC (0.154", 3.90mm) package. However, CD74HC595DW and CD74HC595DWR use a wider 16-SOIC (0.295", 7.50mm) package. Verify PCB layout compatibility before selecting these variants.
Q: Are all listed substitutes ROHS3 compliant?
A: All active and recently produced substitutes carry ROHS3 compliance. The original 74HC595DG does not specify RoHS status. All substitutes meet REACH Unaffected and EAR99 export classification requirements.
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