LM393PW Equivalent & Substitute Parts

Part Overview

The LM393PW is a dual general-purpose comparator manufactured by Texas Instruments in 8-TSSOP surface-mount packaging. This device features open-collector, rail-to-rail output configuration with a supply voltage range of 2V to 36V (single) or ±1V to ±18V (dual). The LM393PW is classified as obsolete, necessitating identification of active equivalent and substitute parts for new designs and ongoing production support.

Key Parameters

Parameter	Value
Manufacturer Part Number	LM393PW
Manufacturer	Texas Instruments
Category	Linear Comparator
Package / Case	8-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
Number of Elements	2
Output Type	Open-Collector, Rail-to-Rail
Voltage - Supply, Single/Dual (±)	2V ~ 36V, ±1V ~ 18V
Voltage - Input Offset (Max)	5mV @ 30V
Current - Input Bias (Max)	0.25µA @ 5V
Current - Output (Typ)	20mA
Current - Quiescent (Max)	2.5mA
Operating Temperature	0°C ~ 70°C
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the LM393PW is determined by the following critical parameters:

Package Compatibility: All substitute parts must use 8-TSSOP surface-mount packaging to ensure PCB layout compatibility without redesign.

Electrical Specifications: Substitute parts must maintain the following electrical characteristics within acceptable tolerances:

Supply voltage range: 2V ~ 36V (single) or ±1V ~ ±18V (dual)
Input offset voltage: ≤ 7mV maximum
Input bias current: ≤ 0.25µA maximum
Output type: Open-Collector configuration
Quiescent current: ≤ 2.5mA maximum

Functional Equivalence: All substitute parts must be dual-element general-purpose comparators with identical pinout and functional behavior.

Compliance Requirements: All substitute parts must maintain ROHS3 compliance and REACH unaffected status.

Substitute parts are grouped into three categories: direct equivalents (matching all parameters), manufacturer-recommended alternatives (active production status with minor parameter variations), and upgrade options (enhanced temperature range or automotive qualification).

Parameter Comparison

Part Number	Manufacturer	Package	Output Type	Supply Voltage	Input Offset (Max)	Output Current (Typ)	Quiescent Current (Max)	Operating Temp	Product Status
LM393PW	Texas Instruments	8-TSSOP	Open-Collector, Rail-to-Rail	2V~36V, ±1V~18V	5mV @ 30V	20mA	2.5mA	0°C ~ 70°C	Obsolete
LM393PWR	Rohm Semiconductor	8-TSSOP	Open-Collector	2V~36V, ±1V~18V	7mV @ 5V	—	1mA	0°C ~ 70°C	Not For New Designs
LM393PT	STMicroelectronics	8-TSSOP	Open-Collector, Rail-to-Rail	2V~36V, ±1V~18V	5mV @ 30V	18mA @ 5V	2.5mA	0°C ~ 70°C	Active
AS393GTR-E1	Diodes Incorporated	8-TSSOP	Open-Collector	2V~36V, ±1V~18V	5mV @ 5V	16mA @ 5V	1mA	-40°C ~ 85°C	Active
LM293P	Texas Instruments	8-DIP	Open-Collector, Open-Drain, Rail-to-Rail	2V~36V, ±1V~18V	5mV @ 30V	20mA	2.5mA	-25°C ~ 85°C	Active
LM293PT	STMicroelectronics	8-TSSOP	Open-Collector, Open-Drain, Rail-to-Rail	2V~36V, ±1V~18V	5mV @ 30V	18mA @ 5V	2.5mA	-40°C ~ 105°C	Active
LM2903PT	STMicroelectronics	8-TSSOP	Open-Collector, Rail-to-Rail	2V~36V, ±1V~18V	7mV @ 5V	16mA @ 5V	2.5mA	-40°C ~ 125°C	Active
LM2903WYPT	STMicroelectronics	8-TSSOP	Open-Collector, Rail-to-Rail	2V~36V, ±1V~18V	7mV @ 5V	16mA @ 5V	2.5mA	-40°C ~ 125°C	Active
LM2903YPT	STMicroelectronics	8-TSSOP	Open-Collector, Rail-to-Rail	2V~36V, ±1V~18V	7mV @ 5V	16mA @ 5V	2.5mA	-40°C ~ 125°C	Active
TA75W393FU,LF	Toshiba Semiconductor and Storage	8-SSOP	CMOS, DTL, MOS, Open-Collector, TTL	2V~36V, ±1V~18V	5mV @ 5V	16nA @ 5V	2mA	-40°C ~ 85°C	Active
UPC393GR-9LG-E2-A	Renesas Electronics Corporation	8-TSSOP	Open-Collector	2V~32V, ±1V~16V	5mV @ 5V	16mA @ 5V	1mA	-40°C ~ 125°C	Active

Engineering Selection Recommendations

Direct Equivalent (Preferred for Drop-In Replacement): LM393PT (STMicroelectronics) is the primary direct equivalent. It maintains identical electrical specifications to the LM393PW, including 5mV input offset voltage, 2.5mA quiescent current, and open-collector rail-to-rail output. The LM393PT is in active production status with ROHS3 compliance and unlimited moisture sensitivity rating. This part requires no circuit redesign and provides the closest functional match.

Manufacturer-Recommended Alternatives: LM2903PT, LM2903WYPT, and LM2903YPT (all STMicroelectronics) are manufacturer-recommended substitutes with active production status. These parts accept the same supply voltage range and maintain open-collector output configuration. The LM2903 series exhibits slightly higher input offset voltage (7mV @ 5V versus 5mV @ 30V) and lower output current (16mA @ 5V versus 20mA typical). The LM2903WYPT and LM2903YPT variants include automotive-grade qualification (AEC-Q100) and extended operating temperature range (-40°C to 125°C), suitable for automotive and industrial applications.

Upgrade Options with Extended Temperature Range: AS393GTR-E1 (Diodes Incorporated) and UPC393GR-9LG-E2-A (Renesas Electronics Corporation) provide active production alternatives with extended operating temperature ranges (-40°C to 85°C and -40°C to 125°C respectively). These parts maintain 8-TSSOP packaging and open-collector output configuration. The AS393GTR-E1 operates at lower quiescent current (1mA) compared to the original specification.

Package Variant (Through-Hole Alternative): LM293P (Texas Instruments) is functionally equivalent but uses 8-DIP through-hole packaging instead of surface-mount. This option is suitable only for applications where through-hole mounting is required or preferred, as it necessitates PCB layout modification.

Compliance Verification: All recommended substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the original LM393PW certification requirements.

Frequently Asked Questions (FAQ)

Q: Can LM393PT be used as a direct replacement for LM393PW without circuit modification? A: Yes. LM393PT is electrically and functionally equivalent with identical 8-TSSOP packaging, supply voltage range, input offset voltage, and output configuration. No circuit redesign is required.

Q: What is the difference between LM393PT and LM2903PT? A: Both are dual comparators in 8-TSSOP packaging with identical supply voltage range. The primary differences are: LM393PT has 5mV input offset voltage (measured at 30V) and 20mA typical output current; LM2903PT has 7mV input offset voltage (measured at 5V) and 16mA typical output current. LM2903PT operates across a wider temperature range (-40°C to 125°C) and is available in automotive-qualified variants.

Q: Is the LM293P a suitable replacement? A: LM293P is functionally equivalent but uses 8-DIP through-hole packaging instead of 8-TSSOP surface-mount. It is suitable only if your application requires through-hole mounting. PCB redesign is necessary for package conversion.

Q: Why is the LM393PWR listed as "Not For New Designs"? A: The LM393PWR is in end-of-life status and not recommended for new product development. Active alternatives such as LM393PT or LM2903PT should be selected instead.

Q: What is the significance of the automotive-qualified variants (LM2903WYPT, LM2903YPT)? A: These parts carry AEC-Q100 automotive qualification and extended operating temperature range (-40°C to 125°C). They are suitable for automotive and harsh industrial environments where standard commercial-grade parts may not meet reliability requirements.

Q: Can TA75W393FU,LF be used as a substitute? A: TA75W393FU,LF is functionally compatible with 8-SSOP packaging (slightly different from 8-TSSOP). It maintains the required supply voltage range and open-collector output. However, verify PCB footprint compatibility before selection, as SSOP and TSSOP packages have minor dimensional differences.

Q: What is the difference between UPC393GR-9LG-E2-A and other substitutes? A: UPC393GR-9LG-E2-A (Renesas) has a slightly reduced supply voltage range (2V~32V single, ±1V~16V dual) compared to the standard 2V~36V specification. It operates across an extended temperature range (-40°C to 125°C) and maintains 8-TSSOP packaging. Verify that your application's supply voltage requirements fall within the 2V~32V range before selection.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the original LM393PW environmental certification requirements.

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