LM193AH/883 Equivalent & Substitute Parts

Part Overview

The LM193AH/883 is a low-power, low-offset voltage dual comparator manufactured by Texas Instruments. This general-purpose comparator features open-collector, rail-to-rail output configuration in a TO-99-8 metal can package for through-hole mounting. The device operates across a wide supply voltage range of 2V to 36V (single supply) or ±1V to ±18V (dual supply), with a maximum input offset voltage of 2mV at 5V and typical quiescent current of 2.5mA. The product is Active status and ROHS3 compliant.

Substitute parts are necessary when through-hole TO-99-8 packaging is unavailable or when surface-mount alternatives are preferred for modern PCB designs. Alternative packages include 8-SOIC, 8-TSSOP, 8-MSOP, and 8-UFSON formats from multiple manufacturers including STMicroelectronics and onsemi.

Key Parameters

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

Substitute Part Grouping Explanation

Substitution of the LM193AH/883 is determined by the following critical parameters:

Electrical Compatibility Requirements:

Supply voltage range: 2V ~ 36V (single) or ±1V ~ 18V (dual)
Output type: Open-Collector or Open-Collector/Open-Drain, Rail-to-Rail
Number of elements: 2 comparators
Quiescent current: 2.5mA maximum
Product status: Active

Mechanical Compatibility Requirements:

Package type: Surface-mount alternatives (8-SOIC, 8-TSSOP, 8-MSOP, 8-UFSON) or through-hole (TO-99-8)
Mounting type: Through-hole or surface-mount
Compliance: ROHS3 compliant, MSL 1

Performance Parameters (Secondary):

Input offset voltage: 2mV to 7mV acceptable range
Input bias current: 0.25µA to 1000pA acceptable range
Output current: 6mA to 18mA acceptable range

All substitute parts listed maintain electrical equivalence within the specified parameter ranges. Package selection depends on PCB design requirements and manufacturing process.

Parameter Comparison

Part Number	Manufacturer	Package Type	Mounting	Supply Voltage (V)	Input Offset (mV)	Input Bias (pA/µA)	Output Current (mA)	Quiescent (mA)	Temp Range (°C)	RoHS
LM193AH/883	Texas Instruments	TO-99-8	Through Hole	2~36 / ±1~18	2 @ 5V	1000pA @ 5V	6	2.5	-55 ~ 125	ROHS3
LM2903D	STMicroelectronics	8-SOIC	Surface Mount	2~36 / ±1~18	7 @ 5V	0.25µA @ 5V	16 @ 5V	2.5	-40 ~ 125	ROHS3
LM293DMR2G	onsemi	8-MSOP	Surface Mount	2~36 / ±1~18	5 @ 30V	0.25µA @ 5V	16 @ 5V	2.5	-25 ~ 85	ROHS3
LM293DT	STMicroelectronics	8-SOIC	Surface Mount	2~36 / ±1~18	5 @ 30V	0.25µA @ 5V	18 @ 5V	2.5	-40 ~ 105	ROHS3
LM293PT	STMicroelectronics	8-TSSOP	Surface Mount	2~36 / ±1~18	5 @ 30V	0.25µA @ 5V	18 @ 5V	2.5	-40 ~ 105	ROHS3
LM293QT	STMicroelectronics	8-UFSON (2x2)	Surface Mount	2~36 / ±1~18	-	-	-	2.5	-	ROHS3
LM393DR2G	onsemi	8-SOIC	Surface Mount	2~36 / ±1~18	5 @ 30V	0.25µA @ 5V	16 @ 5V	2.5	0 ~ 70	ROHS3
LM393DT	STMicroelectronics	8-SOIC	Surface Mount	2~36 / ±1~18	5 @ 30V	0.25µA @ 5V	18 @ 5V	2.5	0 ~ 70	ROHS3
LM393PT	STMicroelectronics	8-TSSOP	Surface Mount	2~36 / ±1~18	5 @ 30V	0.25µA @ 5V	18 @ 5V	2.5	0 ~ 70	ROHS3
LM393QT	STMicroelectronics	8-UFSON (2x2)	Surface Mount	2~36 / ±1~18	-	-	-	2.5	-	ROHS3
LM393WDT	STMicroelectronics	8-SOIC	Surface Mount	2~36 / ±1~18	5 @ 30V	0.25µA @ 5V	16 @ 5V	2.5	0 ~ 70	ROHS3

Engineering Selection Recommendations

For Through-Hole Applications: The LM193AH/883 remains the primary choice when TO-99-8 through-hole mounting is required. No direct through-hole substitute is available in the provided parts list. Redesign to surface-mount technology is necessary to access alternative packages.

For Surface-Mount 8-SOIC Package: LM2903D (STMicroelectronics), LM393DR2G (onsemi), LM393DT (STMicroelectronics), and LM393WDT (STMicroelectronics) are electrically equivalent. All maintain 2V ~ 36V / ±1V ~ 18V supply voltage compatibility and 2.5mA quiescent current. LM393DT and LM393WDT support extended temperature range to 105°C. LM393DR2G and LM393WDT are limited to 0°C ~ 70°C operating range.

For Surface-Mount 8-TSSOP Package: LM293PT and LM393PT (both STMicroelectronics) provide equivalent electrical performance in compact TSSOP format. Both support -40°C ~ 105°C operating range.

For Surface-Mount 8-MSOP Package: LM293DMR2G (onsemi) offers MSOP packaging with equivalent electrical specifications. Operating temperature range is -25°C ~ 85°C.

For Compact 8-UFSON (2x2) Package: LM293QT and LM393QT (both STMicroelectronics) provide the smallest footprint option. Detailed electrical parameters are not provided for these variants.

Compliance Verification: All substitute parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the original LM193AH/883 specifications.

Frequently Asked Questions (FAQ)

Q: Can LM293 series parts directly replace LM393 series parts?

A: Yes. Both LM293 and LM393 base product numbers share identical electrical specifications within the provided parameter set: 2V ~ 36V / ±1V ~ 18V supply voltage, 2.5mA quiescent current, open-collector rail-to-rail output, and dual comparator configuration. Package and temperature range differences are the primary distinctions.

Q: What is the difference between LM293DT and LM393DT?

A: Both are 8-SOIC surface-mount packages from STMicroelectronics with identical electrical specifications. The primary difference is operating temperature range: LM293DT operates -40°C ~ 105°C, while LM393DT operates 0°C ~ 70°C. Select based on application temperature requirements.

Q: Is the LM193AH/883 TO-99-8 package interchangeable with 8-SOIC packages?

A: No. TO-99-8 is a through-hole metal can package, while 8-SOIC is a surface-mount package. These require different PCB footprints and cannot be directly substituted without board redesign. Pin configuration and electrical function are equivalent, but physical mounting is incompatible.

Q: What is the difference between 8-SOIC, 8-TSSOP, and 8-MSOP packages?

A: All three are surface-mount packages with 8 pins and equivalent electrical function. 8-SOIC (0.154" width) is the standard package. 8-TSSOP (0.173" width) and 8-MSOP (0.118" width) are compact alternatives. MSOP is the smallest footprint. Selection depends on PCB space constraints and manufacturing capabilities.

Q: Can I use LM393DR2G in a -55°C application?

A: No. LM393DR2G operates 0°C ~ 70°C. For -55°C ~ 125°C range matching the original LM193AH/883, use LM2903D (STMicroelectronics, -40°C ~ 125°C) or LM293DT (STMicroelectronics, -40°C ~ 105°C). Extended low-temperature operation requires verification of specific application requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant with MSL 1 (Unlimited) rating, matching the original LM193AH/883 compliance status.

Q: What is the input bias current difference between LM193AH/883 and substitute parts?

A: The LM193AH/883 specifies 1000pA (1nA) input bias current at 5V. Most substitute parts specify 0.25µA (250pA) at 5V, which is lower. This represents improved performance and does not affect substitution compatibility. Lower input bias current reduces loading on signal sources.

Q: Can I substitute based on package preference alone?

A: No. Electrical parameters must be verified first. All substitute parts maintain equivalent supply voltage range, quiescent current, and output configuration. However, operating temperature range and input offset voltage specifications vary. Confirm application requirements before selecting based on package alone.

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