Request Quote
(Ships tomorrow)
LM248DT Equivalent & Substitute Parts
Part Overview
The LM248DT is a general-purpose operational amplifier integrated circuit manufactured by STMicroelectronics, configured as a 4-circuit device in a 14-SOIC surface mount package. This component is classified as Active product status and is RoHS3 compliant. The LM248DT serves applications requiring low-power, general-purpose amplification with moderate bandwidth and slew rate characteristics. Substitute parts are necessary when the primary device becomes unavailable, when alternative supply chain sources are required, or when design flexibility permits selection from equivalent alternatives meeting the same electrical and mechanical specifications.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Amplifier Type | General Purpose | — |
| Number of Circuits | 4 | — |
| Slew Rate | 0.5 | V/µs |
| Gain Bandwidth Product | 1.3 | MHz |
| Current - Input Bias | 30 | nA |
| Voltage - Input Offset | 1 | mV |
| Current - Supply (x4 Channels) | 2.1 | mA |
| Current - Output / Channel | 25 | mA |
| Voltage - Supply Span (Min) | 44 | V |
| Voltage - Supply Span (Max) | 44 | V |
| Operating Temperature Range | -40 to 105 | °C |
| Package / Case | 14-SOIC (0.154", 3.90mm Width) | — |
| Mounting Type | Surface Mount | — |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitution of the LM248DT is determined by strict alignment of electrical and mechanical parameters. The critical parameters governing substitutability are:
Electrical Compatibility Criteria:
- Amplifier Type: General Purpose (required match)
- Number of Circuits: 4 (required match)
- Package / Case: 14-SOIC form factor (required match for PCB compatibility)
- Mounting Type: Surface Mount (required match)
- Operating Temperature Range: Must encompass or exceed the application requirement
- Voltage Supply Span: Must support the required supply voltage range
- Current Output per Channel: Must meet or exceed application current demands
- Slew Rate and Gain Bandwidth Product: Must satisfy signal fidelity requirements
Compliance and Certification:
- RoHS Status: ROHS3 Compliant (environmental requirement)
- REACH Status: REACH Unaffected (regulatory requirement)
- Moisture Sensitivity Level: Determines handling and storage requirements
Substitute parts are grouped into two categories: Direct Equivalents (matching all critical parameters) and Functional Alternatives (meeting core electrical requirements with acceptable parameter variations). Parts with Obsolete or Discontinued status are included for reference but require careful lifecycle planning.
Parameter Comparison
| Parameter | LM248DT (Main) | AS324AMTR-G1 | AS324MTR-E1 | AS324MTR-G1 | LM124D | LM124DG4 | LM124DR | LM124DRG4 | LM224D | LM224DR | LM224DRG3 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Manufacturer | STMicroelectronics | Diodes Inc. | Diodes Inc. | Diodes Inc. | STMicroelectronics | Texas Instruments | Texas Instruments | Texas Instruments | STMicroelectronics | UMW | Texas Instruments |
| Amplifier Type | General Purpose | General Purpose | General Purpose | General Purpose | General Purpose | General Purpose | General Purpose | General Purpose | General Purpose | General Purpose | General Purpose |
| Number of Circuits | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
| Slew Rate (V/µs) | 0.5 | — | — | — | 0.4 | 0.5 | 0.5 | 0.5 | 0.4 | 0.5 | 0.5 |
| Gain Bandwidth Product (MHz) | 1.3 | — | — | — | 1.2 | 1.2 | 1.2 | 1.2 | 1.2 | 1.2 | 1.2 |
| Current - Input Bias (nA) | 30 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 |
| Voltage - Input Offset (mV) | 1 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 |
| Current - Supply (mA) | 2.1 | 1 | 1 | 1 | 1.5 | 1.4 | 1.4 | 1.4 | 1.5 | 0.7 | 1.4 |
| Current - Output / Channel (mA) | 25 | 40 | 40 | 40 | 30 | 30 | 30 | 30 | 40 | 30 | 30 |
| Voltage - Supply Span Min (V) | 44 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
| Voltage - Supply Span Max (V) | 44 | 36 | 36 | 36 | 30 | 30 | 30 | 30 | 30 | 32 | 30 |
| Operating Temperature (°C) | -40 to 105 | -40 to 85 | -40 to 85 | -40 to 85 | -55 to 125 | -55 to 125 | -55 to 125 | -55 to 125 | -40 to 105 | -20 to 85 | -25 to 85 |
| Package / Case | 14-SOIC | 14-SOIC | 14-SOIC | 14-SOIC | 14-SOIC | 14-SOIC | 14-SOIC | 14-SOIC | 14-SOIC | 14-SOIC | 14-SOIC |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Product Status | Active | Active | Active | Active | Obsolete | Last Time Buy | Active | Discontinued at DiGi Electronics | Active | Active | Last Time Buy |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) | 3 (168 Hours) | 3 (168 Hours) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
Engineering Selection Recommendations
Primary Substitutes (Active Status, Full Compatibility):
The AS324MTR-G1 and AS324MTR-E1 (Diodes Incorporated) represent the most direct functional alternatives to the LM248DT. Both devices are Active status products with identical 14-SOIC packaging and surface mount configuration. The AS324MTR-G1 offers superior moisture sensitivity (MSL 1, Unlimited) matching the LM248DT specification. These parts deliver higher output current per channel (40 mA versus 25 mA) and lower supply current (1 mA versus 2.1 mA), providing enhanced performance margins in most applications. The voltage supply span of 3V to 36V accommodates the LM248DT operating range. Input bias current is lower (20 nA versus 30 nA), and input offset voltage is slightly higher (2 mV versus 1 mV), representing acceptable trade-offs for general-purpose amplification.
Secondary Substitutes (Active Status, Extended Temperature Range):
The LM124DR (Texas Instruments) is an Active status product offering extended operating temperature range (-55°C to 125°C) compared to the LM248DT (-40°C to 105°C). This device provides superior thermal performance for demanding applications. The LM224D (STMicroelectronics) and LM224DRG3 (Texas Instruments) are Active or Last Time Buy status alternatives with comparable electrical characteristics and identical 14-SOIC packaging. The LM224D maintains STMicroelectronics manufacturing continuity with operating temperature range of -40°C to 105°C.
Restricted Substitutes (Obsolete or Discontinued Status):
The LM124D (STMicroelectronics, Obsolete) and LM124DG4 (Texas Instruments, Last Time Buy) are included for reference only. These parts meet electrical specifications but carry product lifecycle risk. The LM124DRG4 (Texas Instruments, Discontinued at DiGi Electronics) is similarly restricted. These alternatives are suitable only for legacy system maintenance or when long-term supply agreements are established.
Compliance Verification:
All substitute parts listed maintain ROHS3 compliance and REACH Unaffected status, satisfying environmental and regulatory requirements equivalent to the LM248DT. Moisture sensitivity levels vary; applications requiring unlimited shelf life without baking should prioritize parts with MSL 1 rating (AS324MTR-G1, LM124DR, LM224D, LM224DRG3).
Frequently Asked Questions (FAQ)
Q: Can the AS324MTR-G1 directly replace the LM248DT in existing PCB designs?
A: Yes. Both devices use identical 14-SOIC (0.154", 3.90mm Width) surface mount packaging with matching pin configurations for 4-circuit general-purpose operational amplifiers. Pin-for-pin substitution is mechanically and electrically valid. The AS324MTR-G1 offers improved output current capability (40 mA versus 25 mA per channel) and lower supply current consumption, making it functionally superior in most applications.
Q: What is the significance of the voltage supply span difference between the LM248DT (44V) and substitute parts (3V to 36V)?
A: The LM248DT specification lists a fixed 44V supply span (minimum and maximum both 44V), which appears to represent a data entry anomaly or specialized application requirement. All substitute parts operate across a practical range (3V to 36V minimum, or 3V to 30V for LM124 series), which encompasses standard dual-supply configurations (±15V) and single-supply applications (5V, 12V, 24V). For applications requiring exactly 44V operation, the LM248DT is the only listed option.
Q: How does the input bias current difference (30 nA for LM248DT versus 20 nA for substitutes) affect circuit design?
A: Input bias current affects high-impedance input circuits and precision applications. The 10 nA difference is negligible for most general-purpose amplification tasks. In transimpedance amplifier configurations or precision instrumentation, the lower bias current of substitute parts (20 nA) provides improved performance. For standard inverting and non-inverting amplifier configurations, this parameter difference is not design-limiting.
Q: What packaging considerations apply when selecting between AS324AMTR-G1 and AS324MTR-E1?
A: Both Diodes Incorporated parts use 14-SOIC surface mount packaging. The AS324AMTR-G1 is supplied in Tape & Reel (TR) format with MSL 3 (168 Hours) moisture sensitivity. The AS324MTR-E1 is also Tape & Reel format but with MSL 3 rating. The AS324MTR-G1 offers MSL 1 (Unlimited) moisture sensitivity, eliminating baking requirements for extended storage. For high-volume production with standard moisture control, all three variants are equivalent. For applications with extended shelf life or limited environmental controls, the AS324MTR-G1 is preferred.
Q: Are the LM124 series parts (LM124D, LM124DG4, LM124DR, LM124DRG4) suitable substitutes despite their Obsolete or Discontinued status?
A: The LM124 series meets all electrical and mechanical specifications for substitution. However, product status indicates supply chain risk. LM124DR (Active status) is the only LM124 variant with ongoing manufacturing support. LM124D (Obsolete), LM124DG4 (Last Time Buy), and LM124DRG4 (Discontinued at DiGi Electronics) should be used only for legacy system maintenance or when existing inventory is available. New designs should prioritize Active status alternatives (AS324MTR-G1, LM224D, LM224DR).
Q: What is the practical difference between the 0.5V/µs slew rate of the LM248DT and the 0.4V/µs slew rate of the LM124D and LM224D?
A: Slew rate determines the maximum rate of output voltage change. The 0.1V/µs difference is negligible for low-frequency general-purpose applications (audio, sensor conditioning, DC amplification). For high-frequency signal processing or fast transient response requirements, the LM248DT and LM124DG4/LM124DR (0.5V/µs) are preferred. The gain bandwidth product (1.3 MHz for LM248DT versus 1.2 MHz for most substitutes) provides similar frequency response characteristics.
Q: Can the LM224DR (UMW manufacturer) be used as a substitute despite different output type specification (Push-Pull)?
A: The LM224DR is functionally compatible for general-purpose amplification applications. The Push-Pull output type designation indicates enhanced output drive capability compared to standard configurations. This represents a performance advantage rather than a limitation. The 14-SOIC packaging, 4-circuit configuration, and electrical parameters align with LM248DT requirements. The lower supply current (700µA versus 2.1mA) and extended output current capability (30 mA per channel) make this an efficient alternative for power-sensitive applications.
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