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74VCX16244MTDX Equivalent & Substitute Parts
Part Overview
The 74VCX16244MTDX is a non-inverting buffer IC manufactured by onsemi, designed for 4-element, 4-bit-per-element logic applications with 3-state output capability. This device operates across a supply voltage range of 1.2V to 3.6V and is housed in a 48-TSSOP package. The part is currently in Last Time Buy status, indicating limited availability and the necessity to identify functionally equivalent alternatives for ongoing design requirements and production continuity.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | 74VCX16244MTDX |
| Manufacturer | onsemi |
| Logic Type | Buffer, Non-Inverting |
| Number of Elements | 4 |
| Number of Bits per Element | 4 |
| Output Type | 3-State |
| Current - Output High, Low | 24mA, 24mA |
| Voltage - Supply | 1.2V ~ 3.6V |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Package / Case | 48-TFSOP (0.240", 6.10mm Width) |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant |
| Product Status | Last Time Buy |
Substitute Part Grouping Explanation
Substitution of the 74VCX16244MTDX is determined by the following critical parameters:
- Logic function: Non-inverting buffer with 4 elements, 4 bits per element
- Output configuration: 3-state output
- Output drive capability: 24mA high and low current
- Supply voltage range: Minimum 1.2V to 3.6V maximum
- Package type: 48-TSSOP (0.240", 6.10mm Width)
- Operating temperature range: -40°C to 85°C
- Compliance: ROHS3 and REACH requirements
Substitute parts are grouped into two categories based on package compatibility and output drive characteristics. Group 1 maintains the 48-TSSOP package with 24mA output drive. Group 2 includes parts with alternative packages (48-SSOP) or reduced output drive (12mA), which may require design verification for specific applications.
Parameter Comparison
| Part Number | Manufacturer | Logic Type | Elements / Bits | Output Type | Output Current (mA) | Supply Voltage (V) | Package | Product Status | RoHS3 |
|---|---|---|---|---|---|---|---|---|---|
| 74VCX16244MTDX | onsemi | Buffer, Non-Inverting | 4 / 4 | 3-State | 24 / 24 | 1.2 ~ 3.6 | 48-TSSOP | Last Time Buy | Yes |
| 74ALVC162244PAG | IDT | Buffer, Non-Inverting | 4 / 4 | 3-State | 24 / 24 | 2.7 ~ 3.6 | 48-TSSOP | Active | Not specified |
| 74ALVCH162244PAG8 | IDT | Buffer, Non-Inverting | 4 / 4 | 3-State | 12 / 12 | 2.7 ~ 3.6 | 48-TSSOP | Active | Not specified |
| SN74ALVC16244ADGGR | Texas Instruments | Buffer, Non-Inverting | 4 / 4 | 3-State | 24 / 24 | 1.65 ~ 3.6 | 48-TSSOP | Active | Yes |
| SN74ALVC16244ADL | Texas Instruments | Buffer, Non-Inverting | 4 / 4 | 3-State | 24 / 24 | 1.65 ~ 3.6 | 48-SSOP | Active | Yes |
| SN74ALVC16244ADLR | Texas Instruments | Buffer, Non-Inverting | 4 / 4 | 3-State | 24 / 24 | 1.65 ~ 3.6 | 48-SSOP | Active | Yes |
| SN74ALVCH162244DL | Texas Instruments | Buffer, Non-Inverting | 4 / 4 | 3-State | 12 / 12 | 1.65 ~ 3.6 | 48-SSOP | Active | Yes |
| SN74ALVCH162244DLR | Texas Instruments | Buffer, Non-Inverting | 4 / 4 | 3-State | 12 / 12 | 1.65 ~ 3.6 | 48-SSOP | Active | Yes |
| SN74ALVCH162244GR | Texas Instruments | Buffer, Non-Inverting | 4 / 4 | 3-State | 12 / 12 | 1.65 ~ 3.6 | 48-TSSOP | Active | Yes |
| SN74ALVCH16244DGGR | Texas Instruments | Buffer, Non-Inverting | 4 / 4 | 3-State | 24 / 24 | 1.65 ~ 3.6 | 48-TSSOP | Active | Yes |
Engineering Selection Recommendations
For direct replacement of the 74VCX16244MTDX in existing designs, SN74ALVCH16244DGGR (Texas Instruments) is the primary recommendation. This part maintains identical output drive capability (24mA), operates within the required temperature range, and is available in the same 48-TSSOP package. The part is in Active product status with ROHS3 compliance and unlimited moisture sensitivity level, ensuring long-term availability and regulatory compliance.
SN74ALVC16244ADGGR provides an alternative with equivalent electrical performance and ROHS3 compliance, though it operates at a minimum supply voltage of 1.65V rather than 1.2V. This part is suitable for applications where the lower voltage limit is not a design constraint.
For applications where reduced output drive current is acceptable, SN74ALVCH162244GR offers the same package footprint with 12mA output drive and extended supply voltage range down to 1.65V.
Parts with 48-SSOP packaging (SN74ALVC16244ADL, SN74ALVC16244ADLR, SN74ALVCH162244DL, SN74ALVCH162244DLR) require PCB layout modification due to different package dimensions and pin spacing. These are suitable only when board redesign is feasible.
The 74ALVC162244PAG from IDT provides compatibility with the 48-TSSOP package and 24mA output drive but operates at a minimum supply voltage of 2.7V, limiting its use to higher-voltage applications.
Frequently Asked Questions (FAQ)
Q: Can I use SN74ALVCH162244GR as a direct replacement for 74VCX16244MTDX?
A: SN74ALVCH162244GR maintains the same 48-TSSOP package and supply voltage range (1.65V ~ 3.6V), but provides 12mA output drive instead of 24mA. Direct substitution is possible only if your circuit design does not require the full 24mA output current. Verify load impedance and fanout requirements before selection.
Q: What is the difference between 48-TSSOP and 48-SSOP packages?
A: 48-TSSOP (0.240", 6.10mm Width) and 48-SSOP (0.295", 7.50mm Width) are different package footprints with different pin spacing and board layout requirements. These are not pin-compatible and require PCB redesign for substitution.
Q: Does the 74ALVC162244PAG from IDT work with 1.2V supply voltage?
A: No. The 74ALVC162244PAG operates at a minimum supply voltage of 2.7V, while the 74VCX16244MTDX supports 1.2V. This part is not suitable for low-voltage applications requiring 1.2V operation.
Q: Are all substitute parts ROHS3 compliant?
A: Texas Instruments parts (SN74ALVC and SN74ALVCH series) are ROHS3 compliant. IDT parts (74ALVC and 74ALVCH series) do not specify ROHS3 compliance in the provided data. Verify compliance requirements with your procurement specifications.
Q: What is the difference between 74ALVC and 74ALVCH series?
A: Both series provide non-inverting buffer functionality with 3-state output. The primary difference is output drive capability: 74ALVC series provides 24mA, while 74ALVCH series provides 12mA. Select based on your circuit's load current requirements.
Q: Can I use parts with different output current ratings interchangeably?
A: Output current rating determines the maximum load current the part can drive. Using a part with lower output current (12mA vs. 24mA) in a circuit designed for 24mA may result in insufficient drive capability and logic level violations. Verify that your load impedance and fanout are compatible with the selected part's output current specification.
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