LM614CWM/NOPB Equivalent & Substitute Parts

Part Overview

The LM614CWM/NOPB is a general-purpose operational amplifier integrated circuit manufactured by Texas Instruments, containing four independent amplifier circuits in a 16-SOIC surface-mount package. This device is classified as obsolete, indicating discontinued production and limited availability in the market. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production requirements for applications utilizing this component.

Substiute Parts

LM614CWM/NOPB

Texas InstrumentsIn Stock: 783LM614CWM/NOPB Datasheet

Current PartRFQ

TSM104WAID

STMicroelectronicsIn Stock: 1194TSM104WAID Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM614CWM/NOPB is determined by the following critical parameters:

Functional Equivalence Criteria:

• Amplifier Type: General Purpose (4-circuit configuration)
• Package Type: 16-SOIC surface-mount package
• Pin-compatible footprint and pinout

Electrical Compatibility Criteria:

• Supply voltage range must encompass or exceed the original specification (4 V to 36 V minimum)
• Slew rate and gain bandwidth product must meet or exceed application requirements
• Input bias current and input offset voltage within acceptable tolerances
• Output current capability per channel must support load requirements

Compliance & Certification:

• RoHS3 compliance required
• MSL rating of 3 or better
• REACH unaffected status

The TSM104WAID from STMicroelectronics meets these substitution criteria as a manufacturer-recommended equivalent, offering active product status and enhanced electrical performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: TSM104WAID

The TSM104WAID is the manufacturer-recommended substitute for the LM614CWM/NOPB. Selection of this substitute is supported by the following engineering factors:

Product Status & Availability: The TSM104WAID maintains active product status with STMicroelectronics, ensuring ongoing manufacturing support, documented availability, and supply chain reliability. The LM614CWM/NOPB is obsolete, presenting long-term sourcing challenges.

Compliance & Certification: Both devices maintain ROHS3 compliance and identical MSL ratings (3, 168 Hours), ensuring compatibility with current manufacturing and environmental standards. Both carry REACH unaffected status and EAR99 ECCN classification.

Electrical Performance: The TSM104WAID demonstrates superior performance in gain bandwidth product (900 kHz vs. 800 kHz), input offset voltage (500 µV vs. 5 mV), and output current per channel (40 mA vs. 25 mA). These improvements provide enhanced signal fidelity and load-driving capability.

Supply Voltage Considerations: The LM614CWM/NOPB supports a maximum supply voltage of 36 V, while the TSM104WAID maximum is 32 V. Applications requiring supply voltages exceeding 32 V cannot use the TSM104WAID as a direct substitute. The TSM104WAID supports lower minimum supply voltages (3 V vs. 4 V), expanding applicability to lower-voltage systems.

Temperature Range: The TSM104WAID operates across -40°C to 105°C, compared to the LM614CWM/NOPB range of 0°C to 70°C. This extended range accommodates industrial and automotive temperature environments.

Slew Rate Consideration: The TSM104WAID exhibits a lower slew rate (0.3 V/µs vs. 0.7 V/µs). Applications requiring high-speed transient response must evaluate whether this reduced slew rate impacts circuit performance.

Package Dimensions: Both devices use 16-SOIC packages with identical pinouts. The TSM104WAID body width is 3.90 mm compared to 7.50 mm for the LM614CWM/NOPB. PCB layout verification is required to confirm physical compatibility with existing designs.

Frequently Asked Questions (FAQ)

Q1: Can the TSM104WAID directly replace the LM614CWM/NOPB in all applications?

A: The TSM104WAID is pin-compatible and functionally equivalent for general-purpose amplifier applications. However, three conditions require verification: (1) Supply voltage must not exceed 32 V; (2) Slew rate of 0.3 V/µs must be acceptable for the application; (3) PCB layout must accommodate the different 16-SOIC body width (3.90 mm vs. 7.50 mm).

Q2: What is the significance of the different 16-SOIC body widths?

A: Both devices use the same 16-pin SOIC pinout and are electrically compatible. The body width difference (3.90 mm vs. 7.50 mm) affects physical PCB footprint spacing. Existing PCB designs may require layout verification or minor routing adjustments to accommodate the narrower TSM104WAID package.

Q3: Why does the TSM104WAID have higher supply current (1.4 mA vs. 450 µA)?

A: The TSM104WAID supply current specification represents total quiescent current across all four amplifier circuits. This higher value reflects the device's enhanced performance characteristics, including improved bandwidth and output drive capability. Power consumption impact should be evaluated for battery-powered or thermally-constrained applications.

Q4: Is the TSM104WAID suitable for applications requiring 36 V supply operation?

A: No. The TSM104WAID maximum supply voltage is 32 V. Applications requiring 36 V operation cannot use this substitute. Alternative components with higher voltage ratings must be evaluated.

Q5: What are the compliance and certification implications of substitution?

A: Both the LM614CWM/NOPB and TSM104WAID maintain ROHS3 compliance, identical MSL ratings, and REACH unaffected status. Substitution does not introduce compliance risks for standard manufacturing environments. Design documentation and bill-of-materials must be updated to reflect the component change.

Q6: How does the lower slew rate of the TSM104WAID affect circuit performance?

A: Slew rate determines the maximum rate of output voltage change. The TSM104WAID slew rate of 0.3 V/µs is lower than the LM614CWM/NOPB at 0.7 V/µs. Applications involving high-frequency signals, fast transient response, or precision timing circuits must verify that the reduced slew rate does not introduce signal distortion or timing errors.

Q7: What is the product status significance?

A: The LM614CWM/NOPB is obsolete, indicating discontinued production. Existing inventory may be limited and subject to price escalation. The TSM104WAID is active, ensuring long-term availability, stable pricing, and manufacturer technical support. Substitution mitigates obsolescence risk.

Q8: Are there alternative substitute parts beyond TSM104WAID?

A: The input parameters identify TSM104WAID as the manufacturer-recommended substitute. Additional equivalent parts may exist within the STMicroelectronics TSM104 family (TSM104WIDR, TSM104WAIDR) with variations in packaging or temperature rating. Evaluation of these alternatives requires detailed specification comparison against application requirements.