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TS27M4IN Equivalent & Substitute Parts
Part Overview
The TS27M4IN is a CMOS amplifier integrated circuit manufactured by STMicroelectronics, containing four independent circuits in a 14-DIP package. This component is classified as a linear amplifier with CMOS architecture, designed for general-purpose signal amplification applications. The TS27M4IN is currently listed as obsolete, making identification of equivalent and substitute parts essential for design continuity and procurement planning. Substitute parts must maintain compatibility across electrical performance parameters, package dimensions, and thermal operating ranges to ensure functional equivalence in existing circuit designs.
Substiute Parts
Key Parameters
| Parameter | TS27M4IN Value | Unit |
|---|---|---|
| Amplifier Type | CMOS | — |
| Number of Circuits | 4 | — |
| Slew Rate | 0.6 | V/µs |
| Gain Bandwidth Product | 1 | MHz |
| Current - Input Bias | 1 | pA |
| Voltage - Input Offset | 1.1 | mV |
| Current - Supply (x4 Channels) | 150 | µA |
| Current - Output / Channel | 45 | mA |
| Voltage - Supply Span (Min) | 3 | V |
| Voltage - Supply Span (Max) | 16 | V |
| Operating Temperature Range | -40 to 125 | °C |
| Package / Case | 14-DIP (0.300", 7.62mm) | — |
| Mounting Type | Through Hole | — |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitute parts for the TS27M4IN are selected based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:
Critical Matching Parameters:
- Amplifier Type: CMOS architecture with four independent circuits
- Package Configuration: 14-DIP (0.300", 7.62mm) through-hole mounting
- Supply Voltage Range: Minimum 3V to maximum 16V overlap required
- Input Bias Current: Picoampere-level performance (1 pA specification)
- Operating Temperature: Minimum -40°C to maximum 125°C coverage
Secondary Performance Parameters:
- Slew Rate: 0.6 V/µs or compatible performance
- Gain Bandwidth Product: 1 MHz nominal
- Input Offset Voltage: 1.1 mV or lower
- Output Current per Channel: 45 mA or greater
- Supply Current: 150 µA per four channels or lower
Substitute parts are grouped into two categories: CMOS amplifiers maintaining the original architecture and general-purpose amplifiers offering extended performance characteristics. All substitute parts maintain 14-DIP package compatibility and through-hole mounting configuration.
Parameter Comparison
| Parameter | TS27M4IN | LM2902KN | LM2902N | LM2902N/NOPB | NJU7024D# | TLC1079CN | TLC1079IN | TLC25M4CN | TLC274ACN | TLC274AIN | TLC274BCN |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Amplifier Type | CMOS | General Purpose | General Purpose | General Purpose | CMOS | CMOS | CMOS | CMOS | General Purpose | General Purpose | General Purpose |
| Number of Circuits | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
| Slew Rate (V/µs) | 0.6 | 0.5 | 0.4 | — | 0.4 | 0.032 | 0.032 | 0.6 | 3.6 | 3.6 | 3.6 |
| Gain Bandwidth Product (MHz) | 1 | 1.2 | 1 | 1 | 0.4 | 0.11 | 0.11 | 1.7 | 2.2 | 2.2 | 2.2 |
| Current - Input Bias (pA/nA) | 1 pA | 20 nA | 20 nA | 45 nA | 1 pA | 1 pA | 1 pA | 0.6 pA | 0.6 pA | 0.6 pA | 0.6 pA |
| Voltage - Input Offset (mV/µV) | 1.1 mV | 3 mV | 2 mV | 2 mV | 10 mV | 0.18 mV | 0.18 mV | 1.1 mV | 0.9 mV | 0.9 mV | 0.34 mV |
| Current - Supply (µA/mA) | 150 µA | 1.4 mA | 1.5 mA | 1.5 mA | 150 µA | 29 µA | 29 µA | 2.7 mA | 2.7 mA | 2.7 mA | 2.7 mA |
| Current - Output / Channel (mA) | 45 | 30 | 40 | 40 | — | 30 | 30 | — | 30 | 30 | 30 |
| Voltage - Supply Span Min (V) | 3 | 3 | 3 | 3 | 3 | 1.4 | 3 | 1.4 | 3 | 4 | 3 |
| Voltage - Supply Span Max (V) | 16 | 26 | 30 | 32 | 16 | 16 | 16 | 16 | 16 | 16 | 16 |
| Operating Temperature (°C) | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 85 | -20 to 75 | 0 to 70 | -40 to 85 | 0 to 70 | 0 to 70 | -40 to 85 | 0 to 70 |
| Package / Case | 14-DIP | 14-DIP | 14-DIP | 14-DIP | 14-DIP | 14-DIP | 14-DIP | 14-DIP | 14-DIP | 14-DIP | 14-DIP |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | RoHS Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
Engineering Selection Recommendations
Primary Substitutes for Direct Replacement:
The NJU7024D# manufactured by Nisshinbo Micro Devices Inc. provides the closest electrical equivalence to the TS27M4IN. Both components feature CMOS amplifier architecture with four circuits, identical input bias current specifications (1 pA), matching supply voltage range (3V to 16V), and compatible slew rate performance (0.4 V/µs versus 0.6 V/µs). The NJU7024D# maintains through-hole 14-DIP packaging and is currently in active product status. Operating temperature range is -20°C to 75°C, which covers the lower portion of the TS27M4IN specification but does not extend to the full -40°C to 125°C range.
The TLC25M4CN from Texas Instruments offers CMOS amplifier architecture with four circuits in 14-DIP packaging. This part features superior slew rate performance (0.6 V/µs matching the TS27M4IN), higher gain bandwidth product (1.7 MHz), and lower input bias current (0.6 pA). Supply voltage range is 1.4V to 16V, providing extended low-voltage capability. Operating temperature range is 0°C to 70°C. The TLC25M4CN is designated as Last Time Buy status.
Secondary Substitutes with Extended Performance:
The TLC274 series (TLC274ACN, TLC274AIN, TLC274BCN) provides general-purpose amplifier functionality with four circuits in 14-DIP packaging. These parts feature significantly higher slew rate performance (3.6 V/µs) and gain bandwidth product (2.2 MHz), making them suitable for applications requiring faster signal processing. All TLC274 variants maintain 14-DIP through-hole packaging and ROHS3 compliance. Operating temperature ranges vary: TLC274ACN and TLC274BCN operate 0°C to 70°C, while TLC274AIN extends to -40°C to 85°C. These parts are designated as Last Time Buy status.
General-Purpose Alternatives:
The LM2902 series (LM2902KN, LM2902N, LM2902N/NOPB) from Texas Instruments and STMicroelectronics provides general-purpose amplifier functionality with four circuits in 14-DIP packaging. The LM2902KN and LM2902N/NOPB are currently in active product status with extended supply voltage ranges (26V to 32V maximum). The LM2902N from STMicroelectronics is obsolete but offers push-pull output configuration. All LM2902 variants maintain 14-DIP through-hole packaging and ROHS3 compliance.
Low-Bandwidth CMOS Alternatives:
The TLC1079 series (TLC1079CN, TLC1079IN) provides ultra-low power CMOS amplifier functionality with four circuits in 14-DIP packaging. These parts feature extremely low supply current (29 µA for four channels) and exceptional input offset voltage performance (180 µV). Gain bandwidth product is significantly lower (110 kHz) compared to the TS27M4IN. Operating temperature ranges are 0°C to 70°C (TLC1079CN) and -40°C to 85°C (TLC1079IN). Both parts are designated as Last Time Buy status.
Compliance and Certification:
All substitute parts listed maintain ROHS3 compliance or equivalent RoHS certification, ensuring environmental regulatory compatibility. Moisture sensitivity levels are either 1 (Unlimited) or Not Applicable, indicating compatibility with standard handling and storage procedures. REACH status is uniformly listed as REACH Unaffected across all substitute parts.
Frequently Asked Questions (FAQ)
Q: Can the NJU7024D# directly replace the TS27M4IN in all applications?
A: The NJU7024D# provides electrical equivalence for CMOS amplifier applications within the overlapping operating temperature range (-20°C to 75°C). Applications requiring operation below -20°C or above 75°C require evaluation of alternative substitutes. The NJU7024D# is currently in active product status, providing supply chain continuity advantages over the obsolete TS27M4IN.
Q: What is the primary difference between CMOS and general-purpose amplifier substitutes?
A: CMOS amplifiers (TS27M4IN, NJU7024D#, TLC1079 series, TLC25M4CN) feature picoampere-level input bias currents and lower supply current consumption, making them suitable for high-impedance signal sources and battery-powered applications. General-purpose amplifiers (LM2902 series, TLC274 series) feature nanoampere-level input bias currents and higher slew rates, providing improved performance for faster signal processing applications.
Q: Are all substitute parts available in the same 14-DIP package?
A: All substitute parts listed are available in 14-DIP (0.300", 7.62mm) through-hole packaging, maintaining mechanical compatibility with existing printed circuit board designs. Supplier device package designations vary (14-DIP versus 14-PDIP) but refer to the same physical package configuration.
Q: Which substitute part offers the best low-power performance?
A: The TLC1079 series provides the lowest supply current consumption at 29 µA for four channels, compared to 150 µA for the TS27M4IN. This makes the TLC1079 series suitable for battery-powered and energy-constrained applications. However, the TLC1079 series features significantly lower gain bandwidth product (110 kHz) and slew rate (0.032 V/µs), limiting applicability to low-frequency signal processing.
Q: What operating temperature range should be specified for critical applications?
A: The TS27M4IN specifies -40°C to 125°C operation. The TLC274AIN and LM2902N/NOPB provide the closest temperature range coverage among active or recently available parts. Applications requiring the full -40°C to 125°C range should specify TLC274AIN (-40°C to 85°C) with design margin analysis or evaluate custom procurement options.
Q: Are there supply voltage compatibility concerns when substituting parts?
A: The TS27M4IN operates from 3V to 16V. All substitute parts maintain minimum 3V supply voltage compatibility. Several substitutes (LM2902 series, TLC1079CN, TLC25M4CN) support extended maximum supply voltages (16V to 32V). Applications using supply voltages above 16V require selection of LM2902KN, LM2902N, or LM2902N/NOPB. Applications using supply voltages below 3V require evaluation of TLC1079CN or TLC25M4CN, which support operation down to 1.4V.
Q: What is the significance of "Last Time Buy" product status?
A: Parts designated as Last Time Buy (TLC1079 series, TLC25M4CN, TLC274 series) indicate that manufacturers have announced end-of-life production. These parts remain available for procurement but with limited future availability. For new designs or long-term production requirements, preference should be given to parts with Active product status (NJU7024D#, LM2902KN, LM2902N/NOPB).
Q: How do input offset voltage specifications affect circuit performance?
A: The TS27M4IN specifies 1.1 mV input offset voltage. Substitute parts range from 0.18 mV (TLC1079 series) to 10 mV (NJU7024D#). Lower input offset voltage reduces DC error in precision amplifier circuits. Applications requiring offset voltage trimming or precision DC amplification should prioritize substitutes with lower offset voltage specifications (TLC1079 series, TLC274BCN at 0.34 mV).
Q: Are there output current limitations when selecting substitutes?
A: The TS27M4IN provides 45 mA output current per channel. Most substitute parts provide 30 mA output current per channel (LM2902 series, TLC1079 series, TLC274 series), representing a 33% reduction in output drive capability. Applications requiring output currents exceeding 30 mA per channel should retain the TS27M4IN or evaluate alternative amplifier architectures with higher output current specifications.
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