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SN74LVC245APWRE4 Equivalent & Substitute Parts
Part Overview
The SN74LVC245APWRE4 is a non-inverting transceiver logic IC manufactured by Texas Instruments, designed for 8-bit data bus applications with 3-state output capability. This device operates across a supply voltage range of 1.65V to 3.6V and is housed in a 20-TSSOP surface mount package. The part is currently discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components to maintain design continuity and ensure supply chain availability.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Logic Type | Transceiver, Non-Inverting |
| Number of Elements | 1 |
| Number of Bits per Element | 8 |
| Output Type | 3-State |
| Current - Output High, Low | 24mA, 24mA |
| Voltage - Supply | 1.65V ~ 3.6V |
| Operating Temperature | -40°C ~ 125°C (TA) |
| Package / Case | 20-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 eligibility for the SN74LVC245APWRE4 is determined by the following critical parameters:
- Logic Type: Transceiver, Non-Inverting
- Number of Elements: 1
- Number of Bits per Element: 8
- Output Type: 3-State
- Package / Case: 20-TSSOP
- Mounting Type: Surface Mount
- Output Current Capability: 24mA minimum (High and Low)
- Supply Voltage Range: Minimum 1.65V support required
- Operating Temperature Range: -40°C to 125°C minimum
- RoHS3 Compliance: Required
Substitute parts are grouped into two categories: parametric equivalents from Texas Instruments (identical electrical and thermal specifications with packaging variations) and manufacturer-recommended alternatives from onsemi and Nexperia USA Inc. (functionally equivalent with minor parameter variations).
Parameter Comparison
| Part Number | Manufacturer | Series | Output Current (mA) | Supply Voltage (V) | Operating Temp (°C) | Package | Product Status |
|---|---|---|---|---|---|---|---|
| SN74LVC245APWRE4 | Texas Instruments | 74LVC | 24, 24 | 1.65 ~ 3.6 | -40 ~ 125 | 20-TSSOP | Discontinued |
| SN74LVC245APWR | Texas Instruments | 74LVC | 24, 24 | 1.65 ~ 3.6 | -40 ~ 125 | 20-TSSOP | Active |
| SN74LVC245APWRG3 | Texas Instruments | 74LVC | 24, 24 | 1.65 ~ 3.6 | -40 ~ 125 | 20-TSSOP | Active |
| SN74LVC245APWT | Texas Instruments | 74LVC | 24, 24 | 1.65 ~ 3.6 | -40 ~ 125 | 20-TSSOP | Active |
| SN74LVCH245APWR | Texas Instruments | 74LVCH | 24, 24 | 1.65 ~ 3.6 | -40 ~ 125 | 20-TSSOP | Active |
| SN74LVCH245APWT | Texas Instruments | 74LVCH | 24, 24 | 1.65 ~ 3.6 | -40 ~ 125 | 20-TSSOP | Active |
| 74LCX245MTC | onsemi | 74LCX | 24, 24 | 2.0 ~ 3.6 | -40 ~ 85 | 20-TSSOP | Active |
| 74LCX245MTCX | onsemi | 74LCX | 24, 24 | 2.0 ~ 3.6 | -40 ~ 85 | 20-TSSOP | Active |
| 74LVC2245APW,118 | Nexperia USA Inc. | 74LVC | 12, 12 | 1.2 ~ 3.6 | -40 ~ 125 | 20-TSSOP | Active |
| 74LVC245APW,112 | Nexperia USA Inc. | 74LVC | 24, 24 | 1.2 ~ 3.6 | -40 ~ 125 | 20-TSSOP | Obsolete |
| 74LVC245APW,118 | NXP Semiconductors | 74LVC | 24, 24 | 1.2 ~ 3.6 | -40 ~ 125 | 20-TSSOP | Active |
Engineering Selection Recommendations
For direct replacement of the discontinued SN74LVC245APWRE4, the Texas Instruments parametric equivalents SN74LVC245APWR, SN74LVC245APWRG3, and SN74LVC245APWT are the primary selections. These parts maintain identical electrical specifications, thermal performance, and package geometry. The primary distinction among these three is packaging format: SN74LVC245APWR is supplied in Cut Tape and Digi-Reel format, SN74LVC245APWRG3 in Tape & Reel format, and SN74LVC245APWT in Tape & Reel format. All three are currently in active production status with substantial inventory availability.
The SN74LVCH245APWR and SN74LVCH245APWT variants from Texas Instruments represent the same electrical and thermal specifications within the 74LVCH series designation. These are functionally interchangeable with the original part.
The onsemi 74LCX245 series (74LCX245MTC and 74LCX245MTCX) are manufacturer-recommended alternatives with identical output current and package specifications. However, these parts operate within a reduced supply voltage range of 2.0V to 3.6V and a narrower operating temperature range of -40°C to 85°C. Selection of these alternatives requires verification that the application does not require operation below 2.0V supply voltage or above 85°C ambient temperature.
The Nexperia USA Inc. 74LVC245APW,112 and NXP Semiconductors 74LVC245APW,118 are functionally equivalent with extended supply voltage range support (1.2V to 3.6V). The 74LVC2245APW,118 variant exhibits reduced output current capability (12mA versus 24mA) and should be selected only when the application current requirements do not exceed this specification.
All recommended substitutes maintain ROHS3 compliance, MSL Level 1 rating, and identical package footprints suitable for direct PCB replacement.
Frequently Asked Questions (FAQ)
Q: Can the SN74LVC245APWR directly replace the SN74LVC245APWRE4?
A: Yes. The SN74LVC245APWR is a parametric equivalent with identical electrical specifications, output current capability, supply voltage range, operating temperature range, and 20-TSSOP package geometry. The primary difference is packaging format (Cut Tape & Digi-Reel versus the original format). Direct PCB substitution is supported.
Q: What is the difference between SN74LVC245APWR and SN74LVC245APWRG3?
A: Both parts are parametrically identical. The distinction is packaging format: SN74LVC245APWR is supplied in Cut Tape and Digi-Reel format, while SN74LVC245APWRG3 is supplied in Tape & Reel format. Electrical performance and PCB compatibility are identical.
Q: Can I use the onsemi 74LCX245MTCX as a substitute?
A: The 74LCX245MTCX is functionally equivalent with identical output current and package specifications. However, it operates within a reduced supply voltage range (2.0V to 3.6V minimum versus 1.65V) and narrower operating temperature range (-40°C to 85°C versus -40°C to 125°C). Substitution is valid only if your application does not require operation below 2.0V supply voltage or above 85°C ambient temperature.
Q: Why does the Nexperia 74LVC2245APW,118 show lower output current?
A: The 74LVC2245APW,118 is a variant within the 74LVC2245 series with reduced output current specification (12mA versus 24mA). This part is suitable only for applications where output current requirements do not exceed 12mA per output. For applications requiring 24mA output current, select the 74LVC245APW,118 variant instead.
Q: Are all substitute parts RoHS3 compliant?
A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity rating, matching the original SN74LVC245APWRE4 specifications.
Q: What is the difference between the 74LVC and 74LVCH series designations?
A: Both series maintain identical electrical specifications, output current capability, supply voltage range, and operating temperature range. The 74LVCH designation indicates a variant within the same functional family. Both are directly interchangeable for the SN74LVC245APWRE4 application.
Q: Can I use the Nexperia 74LVC245APW,112 if it is listed as Obsolete?
A: The 74LVC245APW,112 is listed as Obsolete status. While it maintains identical electrical specifications to the original part, procurement of obsolete components carries supply chain risk. Active production alternatives such as SN74LVC245APWR or NXP Semiconductors 74LVC245APW,118 are recommended for new designs and ongoing production.
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