Request Quote
(Ships tomorrow)
SC74HC4851ADTR2G Equivalent & Substitute Parts
Part Overview
The SC74HC4851ADTR2G is a single-circuit 8:1 multiplexer/demultiplexer switch IC manufactured by onsemi, housed in a 16-TSSOP surface mount package. This component operates across a 2V to 6V supply range with a maximum on-state resistance of 400Ohm and is designed for analog signal switching applications in interface circuits.
The SC74HC4851ADTR2G carries an Obsolete product status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production or maintenance requirements for systems utilizing this component.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Multiplexer/Demultiplexer Circuit | 8:1 |
| Switch Circuit Configuration | SP8T - Open/Closed |
| Number of Circuits | 1 |
| On-State Resistance (Max) | 400Ohm |
| Channel-to-Channel Matching (ΔRon) | 60Ohm (Max) |
| Voltage - Supply, Single (V+) | 2V ~ 6V |
| Channel Capacitance (CS(off), CD(off)) | 10pF, 40pF |
| Current - Leakage (IS(off)) (Max) | 100nA |
| Operating Temperature | -55°C ~ 125°C (TA) |
| Package / Case | 16-TSSOP (0.173", 4.40mm Width) |
| Mounting Type | Surface Mount |
| Series | 74HC |
Substitute Part Grouping Explanation
Substitution eligibility for the SC74HC4851ADTR2G is determined by strict equivalence across the following critical parameters:
- Multiplexer Configuration: 8:1 topology with SP8T switch circuit
- Electrical Performance: On-state resistance of 400Ohm maximum with 60Ohm maximum channel-to-channel matching
- Supply Voltage Range: 2V to 6V single supply operation
- Leakage Specifications: Maximum 100nA off-state leakage current
- Thermal Range: -55°C to 125°C operating temperature
- Package Compatibility: 16-TSSOP surface mount package with 0.173" (4.40mm) width
- Series Compatibility: 74HC logic family
Parts meeting all these parameters are classified as direct substitutes. Product status and qualification certifications are secondary factors that influence selection priority but do not disqualify functional equivalence.
Parameter Comparison
| Parameter | SC74HC4851ADTR2G (Main Part) | MC74HC4851ADTR2G-Q (Substitute) |
|---|---|---|
| Manufacturer | onsemi | onsemi |
| Series | 74HC | 74HC |
| Multiplexer/Demultiplexer Circuit | 8:1 | 8:1 |
| Switch Circuit Configuration | SP8T - Open/Closed | SP8T - Open/Closed |
| Number of Circuits | 1 | 1 |
| On-State Resistance (Max) | 400Ohm | 400Ohm |
| Channel-to-Channel Matching (ΔRon) | 60Ohm (Max) | 60Ohm (Max) |
| Voltage - Supply, Single (V+) | 2V ~ 6V | 2V ~ 6V |
| Channel Capacitance (CS(off), CD(off)) | 10pF, 40pF | 10pF, 40pF |
| Current - Leakage (IS(off)) (Max) | 100nA | 100nA |
| Operating Temperature | -55°C ~ 125°C (TA) | -55°C ~ 125°C (TA) |
| Package / Case | 16-TSSOP (0.173", 4.40mm Width) | 16-TSSOP (0.173", 4.40mm Width) |
| Mounting Type | Surface Mount | Surface Mount |
| Product Status | Obsolete | Active |
| Grade | - | Automotive |
| Qualification | - | AEC-Q100 |
Engineering Selection Recommendations
The MC74HC4851ADTR2G-Q is a direct functional equivalent to the SC74HC4851ADTR2G. Both parts share identical electrical specifications, package geometry, and thermal operating range. The primary distinction is product status: the SC74HC4851ADTR2G is Obsolete, while the MC74HC4851ADTR2G-Q maintains Active status with automotive-grade qualification (AEC-Q100).
For new designs or ongoing production requiring long-term supply assurance, the MC74HC4851ADTR2G-Q is the appropriate selection. For legacy system maintenance where the original part number must be preserved, the MC74HC4851ADTR2G-Q provides electrical and mechanical compatibility as a drop-in replacement.
Frequently Asked Questions (FAQ)
Q: Can the MC74HC4851ADTR2G-Q replace the SC74HC4851ADTR2G in existing designs?
A: Yes. Both parts are electrically and mechanically identical across all specified parameters: 8:1 multiplexer configuration, 400Ohm on-state resistance, 2V to 6V supply range, and 16-TSSOP package. Pin-for-pin and functional compatibility is confirmed.
Q: What is the significance of the AEC-Q100 qualification on the substitute part?
A: AEC-Q100 is an automotive-grade qualification standard. The MC74HC4851ADTR2G-Q meets this certification, indicating suitability for automotive applications. This does not affect compatibility with non-automotive applications; it represents an additional qualification level.
Q: Are there differences in leakage current or on-state resistance between these parts?
A: No. Both parts specify identical maximum on-state resistance of 400Ohm, channel-to-channel matching of 60Ohm maximum, and off-state leakage current of 100nA maximum.
Q: Does the package footprint differ between these parts?
A: No. Both parts use the 16-TSSOP package with identical dimensions: 0.173" width (4.40mm). PCB layout and assembly processes require no modification.
Q: Why is the original part marked Obsolete?
A: Product status reflects manufacturer lifecycle decisions. The MC74HC4851ADTR2G-Q remains in active production, ensuring continued availability and supply chain stability for this functional specification.
Alternative Parts
SJ6012L2TP
Littelfuse Inc.
6 Alternative Parts
JMK107BBJ476MA-RE
Taiyo Yuden
10 Alternative Parts
GMK107BBJ475MA-T
Taiyo Yuden
5 Alternative Parts
SJ6020N2ARP
Littelfuse Inc.
3 Alternative Parts
SJ6025R2ATP
Littelfuse Inc.
4 Alternative Parts
2474-05L
API Delevan Inc.
1 Alternative Parts
4590R-684K
API Delevan Inc.
1 Alternative Parts
CM6560R-334
API Delevan Inc.
1 Alternative Parts
CM6460-104
API Delevan Inc.
1 Alternative Parts
5526-12
API Delevan Inc.
1 Alternative Parts