LM193H/883 Equivalent & Substitute Parts Reference

Part Overview

The LM193H/883 is a dual general-purpose comparator manufactured by Texas Instruments, housed in a TO-99-8 metal can package for through-hole mounting. This device features low power consumption, low offset voltage, and open-collector rail-to-rail output configuration, making it suitable for precision voltage comparison applications across industrial and aerospace environments. The part maintains active product status with 2318 units in current inventory.

Substitute parts are necessary when through-hole TO-99-8 packaging is unavailable or when surface-mount alternatives are required for modern PCB designs. Equivalent devices must maintain compatible electrical specifications including supply voltage range, input offset voltage, output type, and quiescent current to ensure functional interchangeability.

Key Parameters

Parameter	LM193H/883 Specification
Number of Elements	2
Output Type	Open-Collector, Rail-to-Rail
Voltage Supply (Single/Dual)	2V ~ 36V, ±1V ~ 18V
Input Offset Voltage (Max)	2mV @ 5V
Input Bias Current (Max)	1000pA @ 5V
Output Current (Typ)	6mA
Quiescent Current (Max)	2.5mA
CMRR / PSRR (Typ)	60dB CMRR, 60dB PSRR
Propagation Delay (Max)	700ns (Typ)
Operating Temperature	-55°C ~ 125°C
Package Type	TO-99-8 Metal Can
Mounting Type	Through Hole
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the LM193H/883 is determined by the following critical parameters:

Mandatory Compatibility Criteria:

Dual comparator configuration (2 elements)
Open-Collector or Open-Collector/Open-Drain output type with rail-to-rail capability
Supply voltage range: minimum 2V ~ 36V single supply or ±1V ~ 18V dual supply
Input offset voltage ≤ 7mV @ specified test voltage
Input bias current ≤ 0.25µA @ 5V
Quiescent current ≤ 2.5mA
Operating temperature range encompassing at least 0°C ~ 70°C
RoHS3 compliance and MSL 1 rating

Package Substitution Logic: The LM193H/883 through-hole TO-99-8 package can be substituted with surface-mount alternatives (8-SOIC, 8-TSSOP, 8-MSOP, 8-UFSON, 8-MiniSO) when PCB design permits surface-mount technology. All substitute parts maintain the same functional pinout and electrical behavior within specified tolerances.

Base Product Number Grouping: Substitutes are organized by base product number (LM2903, LM293, LM393) representing different manufacturing lines and performance grades. All listed substitutes share the same functional architecture as the LM193H/883.

Parameter Comparison

Part Number	Manufacturer	Package Type	Mounting	Supply Voltage	Input Offset (Max)	Input Bias (Max)	Output Current	Quiescent (Max)	Temp Range	Status
LM193H/883	Texas Instruments	TO-99-8	Through Hole	2V~36V, ±1V~18V	2mV @ 5V	1000pA @ 5V	6mA	2.5mA	-55°C ~ 125°C	Active
LM2903DR	UMW	8-SOP	Surface Mount	2V~30V, ±1V~±15V	5mV @ 5V	0.25µA @ 5V	16mA @ 5V	2.5mA	0°C ~ 70°C	Active
LM2903WDT	STMicroelectronics	8-SOIC	Surface Mount	2V~36V, ±1V~18V	7mV @ 30V	0.25µA @ 5V	20mA	2.5mA	-40°C ~ 125°C	Active
LM2903WYDT	STMicroelectronics	8-SOIC	Surface Mount	2V~36V, ±1V~18V	7mV @ 30V	0.25µA @ 5V	20mA	2.5mA	-40°C ~ 125°C	Active
LM2903YPT	STMicroelectronics	8-TSSOP	Surface Mount	2V~36V, ±1V~18V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	2.5mA	-40°C ~ 125°C	Active
LM293DMR2G	onsemi	8-MSOP	Surface Mount	2V~36V, ±1V~18V	5mV @ 30V	0.25µA @ 5V	16mA @ 5V	2.5mA	-25°C ~ 85°C	Active
LM293QT	STMicroelectronics	8-UFSON (2x2)	Surface Mount	2V~36V, ±1V~18V	Not Specified	Not Specified	Not Specified	2.5mA	Not Specified	Active
LM293ST	STMicroelectronics	8-MiniSO	Surface Mount	2V~36V, ±1V~18V	5mV @ 30V	0.25µA @ 5V	18mA @ 5V	2.5mA	-40°C ~ 105°C	Active
LM393ADT	STMicroelectronics	8-SOIC	Surface Mount	2V~36V, ±1V~18V	2mV @ 30V	0.1µA @ 5V	18mA @ 5V	2.5mA	0°C ~ 70°C	Active
LM393EDR2G	onsemi	8-SOIC	Surface Mount	2V~36V, ±1V~18V	5mV @ 5V	0.25µA @ 5V	16mA @ 5V	1mA	0°C ~ 70°C	Active
LM393MX	onsemi	8-SOIC	Surface Mount	2V~36V, ±1V~18V	5mV @ 5V	0.25µA @ 5V	18mA @ 5V	2.5mA	0°C ~ 70°C	Obsolete

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

LM2903WDT and LM2903WYDT (STMicroelectronics, 8-SOIC) provide the closest electrical match to the LM193H/883. Both devices maintain the full supply voltage range (2V~36V, ±1V~18V), identical quiescent current specification (2.5mA), and extended operating temperature range (-40°C ~ 125°C). The LM2903WYDT carries AEC-Q100 automotive qualification, suitable for applications requiring automotive-grade reliability. These parts are available in high inventory (67,700 and 27,390 units respectively) and maintain active product status.

Secondary Substitutes (Functional Equivalence with Trade-offs):

LM393ADT (STMicroelectronics, 8-SOIC) offers superior input offset voltage specification (2mV @ 30V, matching the main part) and lower input bias current (0.1µA @ 5V). However, the operating temperature range is limited to 0°C ~ 70°C, making it unsuitable for applications requiring the full -55°C ~ 125°C range of the LM193H/883. This part is recommended only for commercial-grade applications within the specified temperature window.

LM2903YPT (STMicroelectronics, 8-TSSOP) provides full voltage and temperature compatibility with AEC-Q100 automotive qualification. The 8-TSSOP package offers a smaller footprint than 8-SOIC, beneficial for space-constrained designs. Inventory availability is excellent (141,400 units).

Restricted Substitutes (Limited Compatibility):

LM2903DR (UMW, 8-SOP) has a reduced maximum supply voltage of 2V~30V (versus 2V~36V for the main part) and limited operating temperature range (0°C ~ 70°C). Use only when the application operates within these constraints.

LM293DMR2G (onsemi, 8-MSOP) operates within -25°C ~ 85°C temperature range, which does not cover the full -55°C ~ 125°C specification of the LM193H/883. Suitable only for industrial applications within the narrower temperature band.

LM293QT (STMicroelectronics, 8-UFSON) lacks complete electrical specification data in the provided parameters. Electrical verification is required before selection.

LM393MX (onsemi, 8-SOIC) carries obsolete product status. Avoid for new designs; use only for legacy system maintenance where existing inventory exists.

Compliance Verification:

All recommended substitutes maintain RoHS3 compliance and MSL 1 (unlimited moisture sensitivity) rating, matching the main part specifications. No additional environmental qualification is required for standard commercial applications.

Frequently Asked Questions (FAQ)

Q1: Can I directly replace the LM193H/883 TO-99-8 through-hole package with a surface-mount substitute?

A: Direct PCB replacement requires design modification. The LM193H/883 through-hole TO-99-8 package cannot be mechanically installed in surface-mount footprints. However, all listed substitute parts maintain identical electrical functionality and pinout. PCB redesign with appropriate surface-mount footprints (8-SOIC, 8-TSSOP, 8-MSOP, or 8-UFSON) enables functional substitution. For legacy through-hole designs, no direct surface-mount substitute exists; the LM193H/883 must be sourced or a board redesign undertaken.

Q2: Which substitute offers the best temperature range coverage?

A: LM2903WDT and LM2903WYDT both provide -40°C ~ 125°C operating range, covering the lower end of the LM193H/883 specification (-55°C ~ 125°C). For applications requiring the full -55°C minimum temperature, the LM193H/883 remains the only option among listed parts. LM2903YPT also provides -40°C ~ 125°C coverage with automotive qualification.

Q3: What is the difference between LM2903WDT and LM2903WYDT?

A: Both parts are electrically identical (8-SOIC package, -40°C ~ 125°C, 2V~36V supply). The primary difference is packaging format: LM2903WDT is supplied in Tape & Reel (TR), while LM2903WYDT is supplied in Cut Tape (CT) & Digi-Reel format. LM2903WYDT additionally carries AEC-Q100 automotive qualification. Select based on packaging requirements and application grade (automotive vs. industrial).

Q4: Is LM393ADT a suitable substitute for all applications?

A: LM393ADT provides excellent input offset voltage performance (2mV @ 30V, matching the main part) but operates only within 0°C ~ 70°C. It is unsuitable for applications requiring the -55°C ~ 125°C range of the LM193H/883. Use LM393ADT only for commercial-grade applications within the 0°C ~ 70°C window.

Q5: Why does LM293QT lack complete electrical specifications?

A: LM293QT in 8-UFSON (2x2) package has limited datasheet information in the provided parameters. Before selection, obtain complete electrical specifications from STMicroelectronics to verify input offset voltage, input bias current, and output current compliance with application requirements.

Q6: Can I use LM393MX as a substitute?

A: LM393MX carries obsolete product status and should not be selected for new designs. Use only for legacy system maintenance where existing inventory is available. For new applications, select from active-status alternatives: LM2903WDT, LM2903WYDT, LM2903YPT, or LM393ADT.

Q7: What is the key difference between LM2903 and LM393 base product numbers?

A: Both are dual general-purpose comparators with compatible electrical specifications. The primary distinction is input bias current: LM393 series typically features lower input bias current (0.1µA ~ 0.25µA) compared to LM2903 series. LM393ADT specifically offers 0.1µA input bias current, beneficial for high-impedance input applications. Select based on input impedance requirements of the specific application.

Q8: Are all substitutes RoHS3 compliant?

A: Yes. All listed substitute parts maintain RoHS3 compliance and MSL 1 rating, matching the LM193H/883 environmental specifications. No additional environmental qualification is required for standard commercial applications.

Q9: Which substitute has the highest output current capability?

A: LM2903WDT and LM2903WYDT provide 20mA typical output current, the highest among listed substitutes. The main part LM193H/883 specifies 6mA typical output current. If higher output drive capability is required, LM2903WDT or LM2903WYDT are recommended.

Q10: What packaging options are available for surface-mount substitution?

A: Five surface-mount package options are available: 8-SOIC (LM2903WDT, LM2903WYDT, LM393ADT, LM393EDR2G, LM393MX), 8-TSSOP (LM2903YPT), 8-MSOP (LM293DMR2G), 8-MiniSO (LM293ST), and 8-UFSON 2x2 (LM293QT). Select based on PCB layout constraints and available footprint space. 8-SOIC is the most widely supported package with highest inventory availability.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message