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PI74LVC3245ALE Equivalent & Substitute Parts
Part Overview
The PI74LVC3245ALE is a voltage level translator IC manufactured by Diodes Incorporated, designed for bidirectional translation between 2.7V–3.6V (VCCA) and 4.5V–5.5V (VCCB) logic domains. This 24-TSSOP surface-mount device provides 1 circuit with 8 bidirectional channels and tri-state, non-inverted output configuration. The part is currently obsolete, making equivalent substitutes necessary for new designs and ongoing production support.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | PI74LVC3245ALE |
| Manufacturer | Diodes Incorporated |
| Series | 74LVC |
| Product Status | Obsolete |
| Translator Type | Voltage Level |
| Channel Type | Bidirectional |
| Number of Circuits | 1 |
| Channels per Circuit | 8 |
| Voltage - VCCA | 2.7 V ~ 3.6 V |
| Voltage - VCCB | 4.5 V ~ 5.5 V |
| Output Type | Tri-State, Non-Inverted |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Package / Case | 24-TSSOP (0.173", 4.40mm Width) |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution for the PI74LVC3245ALE is determined by the following critical parameters:
Primary Substitution Criteria:
- Translator type: Voltage level translation capability
- Channel configuration: Bidirectional, 8-channel, single-circuit topology
- Package compatibility: 24-TSSOP form factor
- Output configuration: Tri-state output
- Voltage domain support: Compatibility with 2.7V–3.6V and 4.5V–5.5V supplies
- Operating temperature range: Minimum -40°C to 85°C
Substitute Categories:
-
Direct Functional Equivalents (Same Voltage Ranges): Parts maintaining identical VCCA (2.7V–3.6V) and VCCB (4.5V–5.5V) specifications in 24-TSSOP packaging.
-
Extended Voltage Range Equivalents: Parts with broader supply voltage ranges (1.5V–5.5V) that encompass the original specifications, offering greater design flexibility while maintaining functional compatibility.
-
Alternative Logic Family Equivalents: Parts from different logic families (74AVC, 74LVCH, 74LVX) that provide equivalent bidirectional translation in 24-TSSOP packaging with comparable electrical performance.
Parameter Comparison
| Part Number | Manufacturer | Series | Product Status | Translator Type | Channels | Voltage - VCCA | Voltage - VCCB | Output Type | Package | Operating Temp | Grade |
|---|---|---|---|---|---|---|---|---|---|---|---|
| PI74LVC3245ALE | Diodes Inc. | 74LVC | Obsolete | Voltage Level | 8 | 2.7V ~ 3.6V | 4.5V ~ 5.5V | Tri-State | 24-TSSOP | -40°C ~ 85°C | — |
| 74AVC8T245PW-Q100J | Nexperia USA Inc. | 74AVC | Active | Translation Transceiver | 8 | 0.8V ~ 3.6V | 0.8V ~ 3.6V | 3-State | 24-TSSOP | -40°C ~ 125°C | Automotive (AEC-Q100) |
| 74LVC4245ABQ,118 | Nexperia USA Inc. | 74LVC | Active | Voltage Level | 8 | 1.5V ~ 5.5V | 1.5V ~ 3.6V | Tri-State | 24-DHVQFN | -40°C ~ 125°C | — |
| 74LVC4245APW,118 | Nexperia USA Inc. | 74LVC | Active | Voltage Level | 8 | 1.5V ~ 5.5V | 1.5V ~ 3.6V | Tri-State | 24-TSSOP | -40°C ~ 125°C | — |
| 74LVC4245APW-Q100J | Nexperia USA Inc. | 74AVC | Active | Voltage Level | 8 | 1.5V ~ 5.5V | 1.5V ~ 3.6V | Tri-State | 24-TSSOP | -40°C ~ 125°C | Automotive (AEC-Q100) |
| 74LVC8T245PW,118 | Nexperia USA Inc. | 74LVC | Active | Translation Transceiver | 8 | 1.2V ~ 5.5V | 1.2V ~ 5.5V | 3-State | 24-TSSOP | -40°C ~ 125°C | — |
| 74LVC8T245PW-Q100J | Nexperia USA Inc. | 74LVC | Active | Translation Transceiver | 8 | 1.2V ~ 5.5V | 1.2V ~ 5.5V | 3-State | 24-TSSOP | -40°C ~ 125°C | Automotive (AEC-Q100) |
| 74LVCH8T245PW,118 | Nexperia USA Inc. | 74LVCH | Active | Translation Transceiver | 8 | 1.2V ~ 5.5V | 1.2V ~ 5.5V | 3-State | 24-TSSOP | -40°C ~ 125°C | — |
| 74LVCH8T245PW-Q10J | Nexperia USA Inc. | 74LVCH | Active | Translation Transceiver | 8 | 1.2V ~ 5.5V | 1.2V ~ 5.5V | 3-State | 24-TSSOP | -40°C ~ 125°C | Automotive (AEC-Q100) |
| 74LVX3245MTCX | onsemi | 74LVX | Active | Voltage Level | 8 | 2.7V ~ 3.6V | 4.5V ~ 5.5V | Tri-State | 24-TSSOP | -40°C ~ 85°C | — |
| 74LVXC3245MTC | onsemi | 74LVXC | Obsolete | Voltage Level | 8 | 2.7V ~ 3.6V | 3V ~ 5.5V | Tri-State | 24-TSSOP | -40°C ~ 85°C | — |
Engineering Selection Recommendations
Tier 1 – Direct Replacement (Identical Voltage Specifications):
The 74LVX3245MTCX (onsemi) is the closest functional equivalent, maintaining identical voltage ranges (VCCA: 2.7V–3.6V, VCCB: 4.5V–5.5V), bidirectional 8-channel topology, tri-state output, and 24-TSSOP packaging. Operating temperature range matches at -40°C to 85°C. This part is active and suitable for direct substitution in existing designs.
Tier 2 – Extended Voltage Range Equivalents (Active Status):
The 74LVC4245APW,118 and 74LVC4245APW-Q100J (Nexperia) provide broader voltage compatibility (VCCA: 1.5V–5.5V, VCCB: 1.5V–3.6V) while maintaining bidirectional translation, tri-state output, and 24-TSSOP packaging. Both are active products with extended operating temperature (-40°C to 125°C). The -Q100J variant includes automotive qualification (AEC-Q100). These parts are suitable for new designs requiring enhanced voltage flexibility.
Tier 3 – Alternative Logic Family Equivalents:
The 74LVC8T245PW,118 and 74LVCH8T245PW,118 (Nexperia) offer translation transceiver functionality with unified supply voltage ranges (1.2V–5.5V) and 24-TSSOP packaging. Both are active products with extended operating temperature. The -Q100J variants include automotive qualification. These parts are suitable where unified supply voltage operation is acceptable.
The 74AVC8T245PW-Q100J (Nexperia) provides translation transceiver functionality with automotive qualification and extended operating temperature, suitable for automotive applications requiring active product status.
Obsolete Parts to Avoid:
The 74LVXC3245MTC (onsemi) is obsolete and should not be selected for new designs despite matching voltage specifications.
Frequently Asked Questions (FAQ)
Q: Can the 74LVC4245APW,118 directly replace the PI74LVC3245ALE?
A: Yes, with design verification. Both maintain 8-channel bidirectional translation in 24-TSSOP packaging with tri-state output. The 74LVC4245APW,118 has extended voltage ranges (1.5V–5.5V vs. 2.7V–3.6V for VCCA) and extended operating temperature (-40°C to 125°C vs. -40°C to 85°C), making it functionally compatible and suitable for new designs.
Q: What is the difference between the 74LVC4245 and 74LVC8T245 series?
A: The 74LVC4245 is a voltage level translator with separate VCCA and VCCB supplies (1.5V–5.5V and 1.5V–3.6V respectively). The 74LVC8T245 is a translation transceiver with unified supply voltage (1.2V–5.5V). Both provide 8-channel bidirectional translation in 24-TSSOP packaging. Selection depends on whether your design uses separate or unified supply voltages.
Q: Is the 74LVX3245MTCX suitable for automotive applications?
A: The 74LVX3245MTCX is active and maintains identical voltage specifications to the obsolete PI74LVC3245ALE. However, it does not carry automotive qualification (AEC-Q100). For automotive applications, select the 74LVC4245APW-Q100J or 74LVC8T245PW-Q100J, both of which include AEC-Q100 qualification.
Q: Why do some substitutes have extended operating temperature ranges?
A: Extended operating temperature ranges (-40°C to 125°C vs. -40°C to 85°C) reflect improved process technology and design margins in newer logic families. These parts are backward-compatible with designs requiring the original -40°C to 85°C range and provide additional margin for demanding applications.
Q: Are all substitute parts RoHS3 compliant?
A: Yes. All substitute parts listed are RoHS3 compliant with MSL rating of 1 (Unlimited), matching the original PI74LVC3245ALE specifications.
Q: What is the difference between 24-TSSOP and 24-DHVQFN packaging?
A: Both are surface-mount packages with 24 pins. The 24-TSSOP (Thin Shrink Small Outline Package) has a 0.173" width and 4.40mm body width. The 24-DHVQFN (Dual High-K Very Fine Pitch Quad Flat No-Lead) has a 5.5mm × 4.6mm footprint. These are not pin-compatible; verify PCB layout compatibility before substitution.
Q: Can I use the 74AVC8T245PW-Q100J in non-automotive applications?
A: Yes. The 74AVC8T245PW-Q100J is an active product with automotive qualification (AEC-Q100) but is suitable for general industrial and commercial applications. Its extended operating temperature (-40°C to 125°C) and unified supply voltage (0.8V–3.6V) make it suitable for demanding non-automotive environments.
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