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74ALVCH16646DGGRG4 Equivalent & Substitute Parts
Part Overview
The 74ALVCH16646DGGRG4 is a non-inverting transceiver logic IC manufactured by Texas Instruments, featuring 2 elements with 8 bits per element and 3-state output capability. This component operates across a supply voltage range of 1.65V to 3.6V and is housed in a 56-TFSOP surface mount package. The part is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives that maintain electrical and mechanical compatibility for ongoing system support and new designs.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | 74ALVCH16646DGGRG4 |
| Manufacturer | Texas Instruments |
| Logic Type | Transceiver, Non-Inverting |
| Number of Elements | 2 |
| 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 ~ 85°C (TA) |
| Package / Case | 56-TFSOP (0.240", 6.10mm Width) |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| REACH Status | REACH Unaffected |
Substitute Part Grouping Explanation
Substitute parts for the 74ALVCH16646DGGRG4 are selected based on strict electrical and mechanical parameter equivalence. The critical substitution criteria are:
- Logic Type: Transceiver, Non-Inverting
- Number of Elements: 2
- 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 ~ 85°C (TA)
- Package / Case: 56-TFSOP (0.240", 6.10mm Width)
- Mounting Type: Surface Mount
- RoHS Status: ROHS3 Compliant
- Moisture Sensitivity Level (MSL): 1 (Unlimited)
All substitute parts listed maintain identical electrical specifications and physical packaging, ensuring direct functional replacement. Substitutes are differentiated by series designation (74ALVCH, 74LVCH, 74LVC) and product status (Active vs. Discontinued).
Parameter Comparison
| Manufacturer Part Number | Series | Base Product Number | Product Status | Packaging | Inventory (Pcs) | Logic Type | Elements / Bits | Output Type | Current (mA) | Voltage Supply | Temp Range | Package |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 74ALVCH16646DGGRG4 | 74ALVCH | 74ALVCH16646 | Discontinued | - | 1149 | Transceiver, Non-Inverting | 2 / 8 | 3-State | 24, 24 | 1.65V ~ 3.6V | -40°C ~ 85°C | 56-TFSOP |
| SN74ALVCH16543DGGR | 74ALVCH | 74ALVCH16543 | Active | Tape & Reel (TR) | 2710 | Transceiver, Non-Inverting | 2 / 8 | 3-State | 24, 24 | 1.65V ~ 3.6V | -40°C ~ 85°C | 56-TFSOP |
| SN74ALVCH16646DGGR | 74ALVCH | 74ALVCH16646 | Active | Tape & Reel (TR) | 1900 | Transceiver, Non-Inverting | 2 / 8 | 3-State | 24, 24 | 1.65V ~ 3.6V | -40°C ~ 85°C | 56-TFSOP |
| SN74ALVCH16952DGGR | 74ALVCH | 74ALVCH16952 | Active | Tape & Reel (TR) | 744 | Transceiver, Non-Inverting | 2 / 8 | 3-State | 24, 24 | 1.65V ~ 3.6V | -40°C ~ 85°C | 56-TFSOP |
| SN74LVC16646ADGGR | 74LVC | 74LVC16646 | Active | Tape & Reel (TR) | 2400 | Transceiver, Non-Inverting | 2 / 8 | 3-State | 24, 24 | 1.65V ~ 3.6V | -40°C ~ 85°C | 56-TFSOP |
| SN74LVCH16543ADGGR | 74LVCH | 74LVCH16543 | Active | Tape & Reel (TR) | 2350 | Transceiver, Non-Inverting | 2 / 8 | 3-State | 24, 24 | 1.65V ~ 3.6V | -40°C ~ 85°C | 56-TFSOP |
| SN74LVCH16646ADGGR | 74LVCH | 74LVCH16646 | Active | Tape & Reel (TR) | 3199 | Transceiver, Non-Inverting | 2 / 8 | 3-State | 24, 24 | 1.65V ~ 3.6V | -40°C ~ 85°C | 56-TFSOP |
| SN74LVCH16952ADGGR | 74LVCH | 74LVCH16952 | Active | Tape & Reel (TR) | 3178 | Transceiver, Non-Inverting | 2 / 8 | 3-State | 24, 24 | 1.65V ~ 3.6V | -40°C ~ 85°C | 56-TFSOP |
Engineering Selection Recommendations
The 74ALVCH16646DGGRG4 is discontinued; however, direct functional equivalents are available in active production status. Selection among substitute parts should prioritize:
Primary Recommendation: SN74ALVCH16646DGGR maintains identical series designation (74ALVCH) and base product number (74ALVCH16646), ensuring maximum compatibility with existing designs. This part is in active production with 1900 units in stock.
Alternative Options: Parts within the 74LVCH and 74LVC series (SN74LVCH16646ADGGR, SN74LVCH16952ADGGR, SN74LVC16646ADGGR) provide equivalent electrical and mechanical specifications while offering higher inventory availability. All substitute parts are ROHS3 compliant and REACH unaffected, meeting regulatory requirements identical to the original part.
Packaging Consideration: The original part is supplied without specified packaging designation, while all active substitutes are supplied in Tape & Reel (TR) format, which is standard for production quantities.
Frequently Asked Questions (FAQ)
Q: Can SN74ALVCH16646DGGR directly replace 74ALVCH16646DGGRG4?
A: Yes. Both parts share identical electrical specifications (1.65V ~ 3.6V supply, 24mA output current, -40°C ~ 85°C operating range), logic function (2-element, 8-bit non-inverting transceiver with 3-state output), and physical packaging (56-TFSOP). The primary difference is product status (Active vs. Discontinued) and packaging format (Tape & Reel vs. unspecified).
Q: Are 74LVCH and 74LVC series parts compatible substitutes?
A: Yes. SN74LVCH16646ADGGR and SN74LVC16646ADGGR maintain all critical electrical and mechanical parameters required for functional equivalence. Series designation differences reflect manufacturing process variations within Texas Instruments' logic product portfolio, but do not affect electrical performance or pin compatibility in this application.
Q: What is the significance of the base product number difference (16646 vs. 16543 vs. 16952)?
A: Base product numbers identify distinct internal logic configurations. While all listed parts maintain identical electrical specifications and physical packaging, the internal transceiver architecture differs. Selection should be based on specific application requirements and existing design validation. Consult device datasheets for functional differences.
Q: Does packaging format (Tape & Reel vs. unspecified) affect electrical performance?
A: No. Packaging format affects only handling, storage, and supply chain logistics. Electrical specifications, performance characteristics, and pin compatibility remain identical regardless of packaging format.
Q: Are all substitute parts RoHS3 compliant?
A: Yes. All listed substitute parts are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited), matching the compliance profile of the original 74ALVCH16646DGGRG4.
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