TLC4502AMD Equivalent & Substitute Parts

Part Overview

The TLC4502AMD is a CMOS amplifier integrated circuit manufactured by Texas Instruments, featuring two independent rail-to-rail output circuits in an 8-SOIC surface mount package. This device is classified as Last Time Buy, indicating discontinued production with limited inventory availability. The TLC4502AMD operates across a 4V to 6V supply span with a slew rate of 2.5V/µs and gain bandwidth product of 4.7 MHz, making it suitable for low-power analog signal conditioning applications requiring extended temperature operation from -55°C to 125°C.

Equivalent and substitute parts are necessary due to the Last Time Buy status of the TLC4502AMD. Identifying compatible alternatives ensures design continuity and supply chain reliability for applications currently utilizing this component.

Key Parameters

Parameter	TLC4502AMD Value	Criticality for Substitution
Amplifier Type	CMOS	Functional Architecture
Number of Circuits	2	Channel Count
Output Type	Rail-to-Rail	Output Swing Capability
Package / Case	8-SOIC (0.154", 3.90mm Width)	Physical Compatibility
Mounting Type	Surface Mount	Assembly Method
Voltage - Supply Span (Min)	4 V	Minimum Operating Voltage
Voltage - Supply Span (Max)	6 V	Maximum Operating Voltage
Slew Rate	2.5V/µs	Signal Transient Response
Gain Bandwidth Product	4.7 MHz	Frequency Response
Current - Output / Channel	50 mA	Output Drive Capability
Operating Temperature	-55°C ~ 125°C	Temperature Range
RoHS Status	ROHS3 Compliant	Environmental Compliance

Substitute Part Grouping Explanation

Substitution compatibility for the TLC4502AMD is determined by alignment across multiple parameter categories:

Package and Physical Compatibility: All substitute parts must use the 8-SOIC (0.154", 3.90mm Width) surface mount package to ensure direct PCB footprint compatibility without layout redesign.

Electrical Architecture: The main part features a CMOS amplifier topology with two independent circuits and rail-to-rail output capability. Substitute parts must maintain these core functional characteristics to preserve circuit behavior.

Supply Voltage Range: The TLC4502AMD operates within a 4V to 6V supply span. Substitute parts with overlapping or extended supply ranges (minimum ≥4V, maximum ≥6V) are compatible with existing power distribution designs.

Output Drive Capability: The TLC4502AMD delivers 50 mA per channel. Substitute parts with equal or greater output current capability maintain load-driving performance.

Performance Metrics: Slew rate (2.5V/µs) and gain bandwidth product (4.7 MHz) define the signal fidelity and frequency response. Substitute parts with comparable or superior performance metrics preserve application performance.

Compliance and Status: RoHS3 compliance and active product status ensure long-term availability and regulatory alignment.

Parameter Comparison

Parameter	TLC4502AMD	TLC4502ACD	MAX4252ESA+	MAX4257ESA+	MAX4257ESA+T	MAX4282ESA+
Manufacturer	Texas Instruments	Texas Instruments	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated
Number of Circuits	2	2	2	2	2	2
Output Type	Rail-to-Rail	Rail-to-Rail	Push-Pull, Rail-to-Rail	Push-Pull, Rail-to-Rail	Push-Pull, Rail-to-Rail	Rail-to-Rail
Package / Case	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Voltage - Supply Span (Min)	4 V	4 V	2.4 V	2.4 V	2.4 V	2.5 V
Voltage - Supply Span (Max)	6 V	6 V	5.5 V	5.5 V	5.5 V	5.5 V
Slew Rate	2.5V/µs	2.5V/µs	0.3V/µs	2.1V/µs	2.1V/µs	0.7V/µs
Gain Bandwidth Product	4.7 MHz	4.7 MHz	3 MHz	22 MHz	22 MHz	2 MHz
Current - Input Bias	1 pA	1 pA	0.1 pA	0.1 pA	0.1 pA	50 pA
Voltage - Input Offset	10 µV	10 µV	70 µV	70 µV	70 µV	500 µV
Current - Supply	2.5mA (x2 Channels)	2.5mA (x2 Channels)	420µA (x2 Channels)	420µA (x2 Channels)	420µA (x2 Channels)	320µA (x2 Channels)
Current - Output / Channel	50 mA	50 mA	68 mA	68 mA	68 mA	65 mA
Operating Temperature	-55°C ~ 125°C	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Product Status	Last Time Buy	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitute: TLC4502ACD

The TLC4502ACD is the manufacturer-recommended direct substitute for the TLC4502AMD. Both devices are produced by Texas Instruments and share identical electrical specifications including CMOS amplifier architecture, 2.5V/µs slew rate, 4.7 MHz gain bandwidth product, and 50 mA output current per channel. The TLC4502ACD maintains the same 4V to 6V supply span and 8-SOIC package footprint. The primary difference is operating temperature range (0°C to 70°C versus -55°C to 125°C) and product status (Active versus Last Time Buy). The TLC4502ACD is suitable for applications within the 0°C to 70°C temperature window. Both parts are ROHS3 compliant with identical moisture sensitivity levels.

Secondary Substitutes: MAX4257ESA+ and MAX4257ESA+T

The MAX4257ESA+ and MAX4257ESA+T are functionally equivalent alternatives from Analog Devices Inc./Maxim Integrated. These devices feature superior gain bandwidth product (22 MHz versus 4.7 MHz) and comparable slew rate (2.1V/µs versus 2.5V/µs). Both maintain the 8-SOIC package and surface mount configuration. The MAX4257ESA+T is supplied in Tape & Reel packaging with significantly higher inventory (5384 Pcs) compared to tube packaging alternatives. Supply voltage range extends to 2.4V minimum, providing broader compatibility. Output current capability is increased to 68 mA per channel. Operating temperature range is -40°C to 85°C. These parts are suitable for applications where extended frequency response is beneficial and temperature range requirements fall within -40°C to 85°C.

Tertiary Substitutes: MAX4252ESA+ and MAX4282ESA+

The MAX4252ESA+ and MAX4282ESA+ are general-purpose amplifier alternatives with reduced performance specifications. The MAX4252ESA+ features lower slew rate (0.3V/µs) and gain bandwidth product (3 MHz), making it suitable only for low-frequency applications. The MAX4282ESA+ (GainAmp™ series) offers the lowest power consumption (320µA) and reduced slew rate (0.7V/µs) with 2 MHz gain bandwidth product. Both maintain 8-SOIC packaging and rail-to-rail output capability. These substitutes are appropriate for applications with relaxed frequency response requirements and extended battery life priorities.

Compliance and Availability:

All substitute parts maintain ROHS3 compliance and are classified as Active products with established supply chains. The MAX4257ESA+T offers the highest inventory availability (5384 Pcs), ensuring supply continuity for high-volume production requirements.

Frequently Asked Questions (FAQ)

Q: Can the TLC4502ACD directly replace the TLC4502AMD in all applications?

A: The TLC4502ACD is electrically and physically identical to the TLC4502AMD with one exception: operating temperature range. The TLC4502ACD operates from 0°C to 70°C, while the TLC4502AMD operates from -55°C to 125°C. Direct substitution is valid only for applications operating within the 0°C to 70°C temperature window. Applications requiring extended temperature operation below 0°C or above 70°C require alternative selection.

Q: What is the primary advantage of MAX4257ESA+ and MAX4257ESA+T over the TLC4502AMD?

A: The MAX4257ESA+ and MAX4257ESA+T feature significantly higher gain bandwidth product (22 MHz versus 4.7 MHz), enabling superior frequency response and signal fidelity in high-frequency applications. Slew rate remains comparable (2.1V/µs versus 2.5V/µs). Output current capability is increased to 68 mA per channel. These devices are suitable for applications requiring extended frequency response within the -40°C to 85°C operating range.

Q: Is there a difference between MAX4257ESA+ and MAX4257ESA+T?

A: The MAX4257ESA+ and MAX4257ESA+T are electrically identical. The primary difference is packaging format: MAX4257ESA+ is supplied in Tube packaging, while MAX4257ESA+T is supplied in Tape & Reel (TR) format. Tape & Reel packaging is standard for automated assembly processes and offers higher inventory availability (5384 Pcs versus 2000 Pcs).

Q: Can MAX4252ESA+ or MAX4282ESA+ replace the TLC4502AMD?

A: MAX4252ESA+ and MAX4282ESA+ are functionally compatible in terms of package, pin count, and basic amplifier architecture. However, both devices feature significantly reduced performance specifications. The MAX4252ESA+ has 0.3V/µs slew rate and 3 MHz gain bandwidth product. The MAX4282ESA+ has 0.7V/µs slew rate and 2 MHz gain bandwidth product. These substitutes are appropriate only for applications with relaxed frequency response requirements and where the original TLC4502AMD performance specifications exceed application needs.

Q: What supply voltage considerations apply to substitute selection?

A: The TLC4502AMD operates within a 4V to 6V supply span. The TLC4502ACD maintains identical supply range. The MAX4257ESA+, MAX4257ESA+T, MAX4252ESA+, and MAX4282ESA+ all support extended supply ranges with 2.4V to 2.5V minimum and 5.5V maximum. All substitutes are compatible with the original 4V to 6V supply design. Designs operating below 4V require selection of MAX4257, MAX4252, or MAX4282 series devices.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. The TLC4502AMD and all listed substitute parts (TLC4502ACD, MAX4252ESA+, MAX4257ESA+, MAX4257ESA+T, MAX4282ESA+) are ROHS3 compliant. All parts maintain Moisture Sensitivity Level 1 (Unlimited) and REACH Unaffected status.

Q: What is the significance of Last Time Buy status for the TLC4502AMD?

A: Last Time Buy status indicates that Texas Instruments has discontinued production of the TLC4502AMD. Current inventory (957 Pcs) represents the final available stock. Once depleted, the device will no longer be available from the manufacturer. Designs currently utilizing the TLC4502AMD should transition to the TLC4502ACD (for temperature-compatible applications) or alternative MAX4257 series devices (for extended frequency response or supply voltage flexibility) to ensure long-term supply chain continuity.

Q: How does input bias current affect substitute selection?

A: The TLC4502AMD features 1 pA input bias current. The TLC4502ACD maintains identical 1 pA specification. The MAX4257 and MAX4252 series feature 0.1 pA input bias current (lower leakage). The MAX4282ESA+ features 50 pA input bias current (higher leakage). For applications sensitive to input bias current effects, the TLC4502ACD or MAX4257 series are preferred. The MAX4282ESA+ is suitable only for applications where input bias current is not a limiting factor.

Q: What is the significance of input offset voltage differences?

A: The TLC4502AMD and TLC4502ACD feature 10 µV input offset voltage. The MAX4257 and MAX4252 series feature 70 µV offset voltage. The MAX4282ESA+ features 500 µV offset voltage. For precision analog applications requiring minimal DC offset, the TLC4502ACD is preferred. The MAX4257 series offers acceptable offset performance for general-purpose applications. The MAX4282ESA+ is suitable for applications where offset voltage is not a critical parameter.

Q: Does supply current consumption affect substitute selection?

A: The TLC4502AMD draws 2.5 mA total supply current (both channels). The TLC4502ACD maintains identical consumption. The MAX4257, MAX4252, and MAX4282 series feature significantly lower supply current (420 µA and 320 µA respectively). For battery-powered or power-constrained applications, the MAX4257, MAX4252, or MAX4282 series provide substantial power consumption reduction. For line-powered applications, supply current is typically not a limiting factor.

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