LM2904PW Equivalent & Substitute Parts

Part Overview

The LM2904PW is a general-purpose operational amplifier manufactured by Texas Instruments, featuring dual-channel configuration in 8-TSSOP surface-mount packaging. This device is classified as obsolete, indicating discontinued production and limited availability. The LM2904PW contains 2 operational amplifier circuits suitable for general-purpose analog signal processing applications requiring low-power operation and wide supply voltage range compatibility.

Substitute parts are necessary due to the obsolete status of the LM2904PW. Alternative devices maintain functional equivalence through matching core electrical parameters while offering improved availability, active product status, and in some cases, enhanced performance specifications or automotive-grade qualification.

Key Parameters

Parameter	LM2904PW Value	Unit	Substitution Relevance
Number of Circuits	2	Channels	Critical - must match for pin compatibility
Amplifier Type	General Purpose	Category	Critical - defines functional application class
Slew Rate	0.3	V/µs	Important - affects signal fidelity and bandwidth
Gain Bandwidth Product	700	kHz	Important - determines frequency response capability
Current - Input Bias	20	nA	Important - affects input impedance characteristics
Voltage - Input Offset	3	mV	Important - determines DC accuracy
Current - Supply	500	µA (x2 Channels)	Important - affects power consumption
Current - Output / Channel	40	mA	Important - determines output drive capability
Voltage - Supply Span (Min)	3	V	Critical - minimum operating voltage
Voltage - Supply Span (Max)	26	V	Critical - maximum operating voltage
Operating Temperature	-40 to 125	°C	Important - defines thermal operating range
Mounting Type	Surface Mount	Category	Critical - PCB assembly compatibility
Package / Case	8-TSSOP (0.173", 4.40mm Width)	Form Factor	Critical - physical and electrical pin compatibility
RoHS Status	ROHS3 Compliant	Certification	Important - regulatory compliance requirement
Moisture Sensitivity Level (MSL)	1 (Unlimited)	Classification	Important - handling and storage requirements

Substitute Part Grouping Explanation

Substitution logic for the LM2904PW is based on strict electrical and mechanical parameter matching within the following framework:

Critical Matching Parameters:

Number of Circuits: Must be 2 (dual-channel configuration)
Amplifier Type: Must be General Purpose
Mounting Type: Must be Surface Mount
Package compatibility: 8-TSSOP or mechanically equivalent packages
Supply voltage range: Minimum 3V, Maximum ≥26V
RoHS3 Compliance: Required for regulatory alignment

Important Matching Parameters:

Slew Rate: 0.3V/µs nominal (tolerance range 0.2–0.6V/µs acceptable)
Gain Bandwidth Product: 700 kHz nominal (range 500–1100 kHz acceptable)
Input Bias Current: 20 nA (range 20 nA acceptable)
Input Offset Voltage: ≤3 mV (range 1–3 mV acceptable)
Output Current per Channel: ≥30 mA (40 mA nominal)
Supply Current: ≤1 mA per device (range 500µA–1mA acceptable)
Operating Temperature: -40°C to 125°C minimum

Packaging Variants Accepted:

8-TSSOP (primary package)
8-MSOP (mechanically compatible, different footprint)
8-SSOP-B (mechanically compatible, different footprint)

Substitute parts are grouped by product status (Active vs. Obsolete), manufacturer, and package type. All listed substitutes maintain functional equivalence within the specified parameter ranges.

Parameter Comparison

Parameter	LM2904PW (Main)	LM2904PWR	BA2904SFV-E2	LM2904AM8-13	LM2904ATH-13	LM2904AYPT	LM2904M8-13	LM2904PT	LM2904TH-13	LM2904WYPT	LM2904YPT
Manufacturer	Texas Instruments	Rohm Semiconductor	Rohm Semiconductor	Diodes Inc.	Diodes Inc.	STMicroelectronics	Diodes Inc.	Rohm Semiconductor	Diodes Inc.	STMicroelectronics	STMicroelectronics
Number of Circuits	2	2	2	2	2	2	2	2	2	2	2
Amplifier Type	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose
Slew Rate (V/µs)	0.3	0.3	0.2	0.3	0.3	0.6	0.3	0.3	0.3	0.6	0.6
Gain Bandwidth Product (kHz)	700	700	500	700	700	1100	700	800	700	1100	700
Current - Input Bias (nA)	20	20	20	20	20	20	20	20	20	20	20
Voltage - Input Offset (mV)	3	3	2	1	1	1	2	1	2	2	2
Current - Supply (µA)	500 (x2)	1000	500	700 (x2)	700 (x2)	700	700 (x2)	600	700 (x2)	700	700
Current - Output / Channel (mA)	40	40	30	40	40	40	40	30	40	40	30
Voltage - Supply Span Min (V)	3	3	3	3	3	3	3	3	3	3	3
Voltage - Supply Span Max (V)	26	26	32	36	36	30	36	32	36	30	30
Operating Temperature (°C)	-40 to 125	-40 to 125	-40 to 105	-40 to 125	-40 to 125	-40 to 125	-40 to 125	-40 to 125	-40 to 125	-40 to 125	-40 to 125
Package / Case	8-TSSOP	8-TSSOP	8-LSSOP	8-MSOP	8-TSSOP	8-TSSOP	8-MSOP	8-TSSOP	8-TSSOP	8-TSSOP	8-TSSOP
Product Status	Obsolete	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Inventory Status	4900 Pcs	65100 Pcs	501175 Pcs	25100 Pcs	5139 Pcs	257744 Pcs	25300 Pcs	12814 Pcs	3518 Pcs	2821 Pcs	55100 Pcs

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

LM2904ATH-13 (Diodes Incorporated) – Active product status with 8-TSSOP package matching the original LM2904PW footprint. Electrical parameters align within acceptable tolerance ranges. Suitable for direct replacement in existing PCB designs without layout modifications.
LM2904TH-13 (Diodes Incorporated) – Active product with identical 8-TSSOP package configuration. Maintains all critical electrical parameters. Recommended for new designs requiring long-term supply assurance.
LM2904AYPT (STMicroelectronics) – Active product with automotive-grade qualification (AEC-Q100) and enhanced slew rate (0.6V/µs) and gain bandwidth product (1.1 MHz). Suitable for applications requiring higher performance margins or automotive-grade reliability. 8-TSSOP package compatible.

Secondary Substitutes (Package Variant Compatibility):

LM2904AM8-13 (Diodes Incorporated) – Active product in 8-MSOP package (0.118" width vs. 0.173" for TSSOP). Requires PCB footprint redesign but offers superior electrical specifications including lower input offset voltage (1 mV) and extended supply voltage range (36V maximum).
LM2904M8-13 (Diodes Incorporated) – Active product in 8-MSOP package with matching electrical performance to LM2904AM8-13. Tape & Reel packaging for high-volume applications.
LM2904PT (Rohm Semiconductor) – Active product in 8-TSSOP package with enhanced gain bandwidth product (800 kHz). Suitable for applications requiring slightly improved frequency response.

Tertiary Substitutes (Extended Supply Voltage Range):

BA2904SFV-E2 (Rohm Semiconductor) – Active product with extended maximum supply voltage (32V vs. 26V). 8-LSSOP package requires footprint redesign. Note: Operating temperature limited to -40°C to 105°C (vs. 125°C for primary substitutes).

Obsolete Alternatives (Not Recommended for New Designs):

LM2904PWR (Rohm Semiconductor) – Obsolete status. Avoid for new designs despite active inventory. Use only for legacy system maintenance where supply continuity is critical.

Selection Criteria Summary:

For direct PCB replacement: Select LM2904ATH-13, LM2904TH-13, or LM2904AYPT (all 8-TSSOP)
For automotive applications: Select LM2904AYPT or LM2904WYPT (AEC-Q100 qualified)
For high-volume production: Select LM2904M8-13 or LM2904AM8-13 (Tape & Reel packaging)
For extended voltage range: Select BA2904SFV-E2 (32V maximum, requires layout redesign)
For enhanced performance: Select LM2904AYPT or LM2904WYPT (1.1 MHz gain bandwidth product)

All recommended substitutes maintain ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity classification.

Frequently Asked Questions (FAQ)

Q1: Can I use LM2904AM8-13 as a direct replacement for LM2904PW without PCB modifications?

A: No. LM2904AM8-13 uses 8-MSOP package (0.118" width) while LM2904PW uses 8-TSSOP package (0.173" width). Although both are 8-pin surface-mount packages, the footprints are physically incompatible. PCB redesign is required. For direct replacement without layout changes, use LM2904ATH-13 or LM2904TH-13 (both 8-TSSOP).

Q2: What is the difference between LM2904AYPT and LM2904WYPT?

A: Both are STMicroelectronics products in 8-TSSOP packages with identical electrical specifications (0.6V/µs slew rate, 1.1 MHz gain bandwidth product, AEC-Q100 automotive qualification). The primary difference is packaging: LM2904AYPT is supplied in Tape & Reel format, while LM2904WYPT is supplied in Cut Tape & Digi-Reel format. Select based on assembly equipment compatibility and volume requirements.

Q3: Why does BA2904SFV-E2 have a lower maximum operating temperature (105°C vs. 125°C)?

A: BA2904SFV-E2 is a Rohm Semiconductor device with different thermal design specifications. The 105°C maximum operating temperature is a design characteristic of this particular device family. For applications requiring full -40°C to 125°C range, select alternatives such as LM2904ATH-13, LM2904TH-13, or LM2904AYPT.

Q4: Is LM2904PWR suitable for new product designs?

A: No. LM2904PWR has obsolete product status, indicating discontinued manufacturing. Although inventory is available (65,100 pieces), using obsolete components in new designs creates long-term supply risk. Select active-status alternatives such as LM2904ATH-13, LM2904TH-13, or LM2904AYPT for new designs.

Q5: What does "8-TSSOP (0.173", 4.40mm Width)" mean?

A: This describes the physical package dimensions. 8-TSSOP indicates an 8-pin Thin Shrink Small Outline Package. The 0.173" (4.40mm) width is the package body width. This specification is critical for PCB footprint design and component placement. Packages with different width specifications (such as 8-MSOP at 0.118" width) require different PCB footprints.

Q6: Can I substitute LM2904YPT for LM2904AYPT?

A: Both are STMicroelectronics products in 8-TSSOP packages with automotive qualification (AEC-Q100). Key difference: LM2904YPT has lower output current per channel (30 mA vs. 40 mA) and lower maximum supply voltage (30V vs. 30V). Both have identical slew rate (0.6V/µs) and gain bandwidth product (700 kHz for YPT vs. 1.1 MHz for AYPT). Select LM2904AYPT for applications requiring 40 mA output drive or 1.1 MHz bandwidth; select LM2904YPT for lower-power applications.

Q7: What is the significance of "RoHS3 Compliant" status?

A: RoHS3 (Restriction of Hazardous Substances Directive 3) compliance certifies that the component meets European Union environmental regulations restricting lead, cadmium, mercury, and other hazardous substances. All listed substitutes maintain RoHS3 compliance, ensuring regulatory alignment with modern manufacturing standards and export requirements.

Q8: Why do some substitutes show higher supply current (700µA vs. 500µA)?

A: Supply current variation reflects different semiconductor manufacturing processes and design implementations. Higher supply current (700µA) is within acceptable tolerance for general-purpose amplifier applications and does not indicate inferior performance. Select based on total system power budget requirements. For power-critical applications, LM2904PT (600µA) or BA2904SFV-E2 (500µA) may be preferred.

Q9: Are all listed substitutes pin-compatible with LM2904PW?

A: Pin compatibility depends on package type. Devices in 8-TSSOP package (LM2904ATH-13, LM2904TH-13, LM2904AYPT, LM2904PT, LM2904WYPT, LM2904YPT) are pin-compatible with LM2904PW. Devices in 8-MSOP package (LM2904AM8-13, LM2904M8-13) and 8-LSSOP package (BA2904SFV-E2) have different pin assignments and require PCB redesign.

Q10: What does "Moisture Sensitivity Level (MSL): 1 (Unlimited)" mean?

A: MSL Level 1 indicates the component has unlimited shelf life and does not require special moisture-control handling during storage or assembly. This is the least restrictive moisture sensitivity classification. All listed substitutes maintain MSL Level 1 status, ensuring compatibility with standard manufacturing and storage procedures without specialized desiccant packaging or baking requirements.

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