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Product Detailed Parameters
- Description：IC COMPARATOR 2 GEN PUR 8SOP
- Series：Signature
- Mfr：Rohm Semiconductor
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：General Purpose
- Number of Elements：2
- Output Type：Open-Collector, Rail-to-Rail
- Voltage - Supply, Single/Dual (±)：2V ~ 36V, ±1V ~ 18V
- Voltage - Input Offset (Max)：7mV @ 5V
- Current - Input Bias (Max)：0.25µA @ 5V
- Current - Output (Typ)：16mA @ 5V
- Current - Quiescent (Max)：2.5mA
- CMRR, PSRR (Typ)：-
- Propagation Delay (Max)：-
- Hysteresis：-
- Operating Temperature：-40°C ~ 125°C
- Package / Case：8-SOIC (0.154", 3.90mm Width)
- Mounting Type：Surface Mount
- Supplier Device Package：8-SOP
- Grade：-
- Qualification：-
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Overview
The LM2903DT is a monolithic integrated circuit containing two independent voltage comparators manufactured by Rohm Semiconductor. It operates with a single supply voltage ranging from +2V to +36V, or dual supplies of ±1V to ±18V. The device features low supply current (typical 0.4mA) and an input common-mode voltage range that includes the negative rail. It utilizes open-collector outputs compatible with TTL, DTL, ECL, MOS, and CMOS logic families. The component is housed in an SOIC-8 package and supports an extended operating temperature range from -40°C to +125°C.
Feature Summary
- Operable with a wide operating supply voltage range using a single power source
- Input common-mode voltage range includes the negative supply rail for ground sensing
- Low supply current consumption independent of the supply voltage level
- Open collector output configuration compatible with various digital logic families
Applications
- Consumer Electronics
- Current Sense Application
- Battery Monitor
- Multivibrator
Procurement Notes
Verify the manufacturer designation on the datasheet header and physical marking, as the LM2903 series is widely produced by multiple vendors including STMicroelectronics. Confirm the specific suffix 'DT' corresponds to the Rohm Semiconductor SOIC-8 package variant rather than other manufacturers' equivalents. Ensure the procurement documentation explicitly references the Rohm datasheet TSZ02201-0RFR0G200530-1-2 to guarantee electrical parameter compliance.
Selection Notes
Select this component when an industrial temperature range (-40°C to +125°C) is required, distinguishing it from the commercial grade LM393 which operates up to +85°C. The open-collector output necessitates an external pull-up resistor for proper high-level logic generation. Verify that the application does not require rail-to-rail output swing, as the saturation voltage limits the low-level output near the negative rail.
Part Context
This part belongs to the Rohm Signature Series of general-purpose comparators, sharing the same internal architecture as the LM393, LM339, and LM2901. The primary distinction within this family is the specified operating temperature range; the LM2903 variants are qualified for extended industrial temperatures compared to the standard commercial versions.
Replacement Considerations
LM393DT
FAQ
Does the input common-mode voltage range include the negative supply rail?
Yes, the LM2903DT allows the input common-mode voltage to extend down to the negative supply rail, enabling ground-sense operation even with a single positive power supply.
What is the maximum differential input voltage rating?
The absolute maximum differential input voltage is rated at +36V, which matches the maximum supply voltage limit.
