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74HCT245D,652 Equivalent & Substitute Parts
Part Overview
The 74HCT245D,652 is a non-inverting transceiver logic IC manufactured by Nexperia USA Inc., designed for 8-bit bidirectional data transfer with 3-state output capability. This component operates within the 4.5V to 5.5V supply voltage range and is housed in a 20-SOIC surface mount package.
The 74HCT245D,652 carries an Obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for systems utilizing this transceiver architecture.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | 74HCT245D,652 |
| Manufacturer | Nexperia USA Inc. |
| Logic Type | Transceiver, Non-Inverting |
| Number of Elements | 1 |
| Number of Bits per Element | 8 |
| Output Type | 3-State |
| Current - Output High, Low | 6mA, 6mA |
| Voltage - Supply | 4.5V ~ 5.5V |
| Operating Temperature | -40°C ~ 125°C (TA) |
| Package / Case | 20-SOIC (0.295", 7.50mm Width) |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| Product Status | Obsolete |
Substitute Part Grouping Explanation
Substitution eligibility for the 74HCT245D,652 is determined by the following critical parameters:
- Logic Architecture: Non-inverting transceiver with 1 element, 8 bits per element, and 3-state output
- Electrical Specifications: Supply voltage range 4.5V ~ 5.5V; output current capability 6mA (high and low)
- Package Compatibility: 20-SOIC surface mount package with 0.295" width and 7.50mm body width
- Operating Temperature Range: Minimum -40°C to maximum 125°C
- Compliance Requirements: ROHS3 compliance and MSL rating
Substitute parts must maintain functional equivalence across these parameters. Variations in output current, operating temperature range, or MSL rating indicate design differences that may affect system performance or reliability in specific applications.
Parameter Comparison
| Part Number | Manufacturer | Logic Type | Output Current (mA) | Supply Voltage | Operating Temp (°C) | Package | Product Status | RoHS Status | MSL |
|---|---|---|---|---|---|---|---|---|---|
| 74HCT245D,652 | Nexperia USA Inc. | Transceiver, Non-Inverting | 6, 6 | 4.5V ~ 5.5V | -40 ~ 125 | 20-SOIC | Obsolete | ROHS3 | 1 |
| 74HCT245D,653 | Nexperia USA Inc. | Transceiver, Non-Inverting | 6, 6 | 4.5V ~ 5.5V | -40 ~ 125 | 20-SOIC | Active | ROHS3 | 1 |
| CD74HCT245M | Harris Corporation | Transceiver, Non-Inverting | 4, 4 | 4.5V ~ 5.5V | -55 ~ 125 | 20-SOIC | Obsolete | RoHS non-compliant | — |
| CD74HCT245M96 | Texas Instruments | Transceiver, Non-Inverting | 4, 4 | 4.5V ~ 5.5V | -55 ~ 125 | 20-SOIC | Active | ROHS3 | 1 |
| MC74HCT245ADWG | onsemi | Transceiver, Non-Inverting | 6, 6 | 4.5V ~ 5.5V | -55 ~ 125 | 20-SOIC | Active | ROHS3 | 3 |
| MC74HCT245ADWR2G | onsemi | Transceiver, Non-Inverting | 6, 6 | 4.5V ~ 5.5V | -55 ~ 125 | 20-SOIC | Active | ROHS3 | 3 |
| MM74HCT245WM | Fairchild Semiconductor | Transceiver, Non-Inverting | 7.2, 7.2 | 4.5V ~ 5.5V | -40 ~ 85 | 20-SOIC | Active | — | — |
| MM74HCT245WMX | onsemi | Transceiver, Non-Inverting | 7.2, 7.2 | 4.5V ~ 5.5V | -40 ~ 85 | 20-SOIC | Active | ROHS3 | 3 |
| SN74HCT245DW | Texas Instruments | Transceiver, Non-Inverting | 6, 6 | 4.5V ~ 5.5V | -40 ~ 85 | 20-SOIC | Discontinued at DiGi Electronics | ROHS3 | 1 |
| SN74HCT245DWR | Texas Instruments | Transceiver, Non-Inverting | 6, 6 | 4.5V ~ 5.5V | -40 ~ 85 | 20-SOIC | Active | ROHS3 | 1 |
Engineering Selection Recommendations
Primary Substitute (Highest Compatibility): 74HCT245D,653 from Nexperia USA Inc. This part maintains identical electrical specifications, package configuration, and MSL rating as the original 74HCT245D,652. The primary distinction is Active product status, ensuring ongoing availability and supply chain support. Both parts are ROHS3 compliant with MSL 1 rating.
Active Alternatives with Matching Output Current: MC74HCT245ADWG and MC74HCT245ADWR2G from onsemi provide 6mA output current matching the original specification. Both are Active products with ROHS3 compliance. These parts extend the operating temperature range to -55°C ~ 125°C and carry MSL 3 rating, indicating different moisture handling requirements during storage and assembly.
Active Alternatives with Extended Temperature Range: CD74HCT245M96 from Texas Instruments is an Active product with ROHS3 compliance and extended operating temperature range (-55°C ~ 125°C). Output current is reduced to 4mA, which may limit drive capability in high-current applications but remains within the 74HCT logic family specifications.
Alternatives with Higher Output Current: MM74HCT245WM and MM74HCT245WMX provide 7.2mA output current, exceeding the original specification. MM74HCT245WMX is ROHS3 compliant and Active. Both parts operate at -40°C ~ 85°C, representing a narrower temperature range than the original part.
Discontinued Alternative: SN74HCT245DW from Texas Instruments is discontinued at DiGi Electronics but remains available through secondary channels. SN74HCT245DWR is the Active equivalent from Texas Instruments with identical electrical specifications and ROHS3 compliance.
Frequently Asked Questions (FAQ)
Q: Can I substitute 74HCT245D,653 for 74HCT245D,652 without design changes?
A: Yes. Both parts are functionally equivalent non-inverting transceivers with identical output current (6mA), supply voltage range (4.5V ~ 5.5V), and 20-SOIC package configuration. The primary difference is product status: 74HCT245D,653 is Active, ensuring continued availability.
Q: What is the significance of output current differences between substitute parts?
A: Output current determines the maximum load-driving capability. The original 74HCT245D,652 specifies 6mA. Parts with lower output current (4mA) may not drive heavily loaded bus lines. Parts with higher output current (7.2mA) provide additional drive capability but may increase power dissipation. Selection depends on specific load requirements in your application.
Q: Why do some substitutes have different operating temperature ranges?
A: Operating temperature range reflects the validated performance envelope for each manufacturer's design. The original part specifies -40°C ~ 125°C. Substitutes with -55°C ~ 125°C provide extended low-temperature operation. Substitutes with -40°C ~ 85°C have narrower ranges and may not be suitable for high-temperature applications. Verify your system's thermal requirements before selection.
Q: What does MSL rating mean, and why does it vary?
A: Moisture Sensitivity Level (MSL) indicates how long a component can be stored in standard conditions (23°C, 50% relative humidity) before assembly. MSL 1 (Unlimited) allows indefinite storage. MSL 3 (168 Hours) requires assembly within 168 hours of package opening. Higher MSL ratings require more careful handling and storage control during manufacturing.
Q: Are all substitute parts ROHS3 compliant?
A: No. CD74HCT245M from Harris Corporation is RoHS non-compliant. If your application requires ROHS3 compliance, select from: 74HCT245D,653, CD74HCT245M96, MC74HCT245ADWG, MC74HCT245ADWR2G, MM74HCT245WMX, SN74HCT245DW, or SN74HCT245DWR.
Q: Which substitute offers the best long-term availability?
A: 74HCT245D,653 from Nexperia USA Inc. is the recommended primary substitute, maintaining Active product status with identical specifications to the original obsolete part. Texas Instruments SN74HCT245DWR and onsemi MC74HCT245ADWG and MC74HCT245ADWR2G are also Active products with established supply channels.
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