Key Selection Information
| Selection Parameter | Confirmed Information |
|---|---|
| Channels | 2 comparators |
| Maximum Rating | Up to 38 V stated for B version |
| Input Offset | 0.37 mV stated improved B-version value |
| Input Bias | 3.5 nA stated |
| Supply Current | 200 µA per comparator stated |
| Response | 1 µs stated B-version response |
| Output | Open-collector; common-mode range includes ground |
| Exact Package / Packing | SOIC (D), 8 pins; 2500-piece large reel; −40°C to +125°C; marking L2903B |
Product Overview
LM2903BIDR is the improved B-generation dual comparator intended as a drop-in upgrade path for older LM2903/LM393-family designs. TI specifically improves offset, bias current, supply range, response and ESD performance while retaining the familiar open-collector architecture.
The lower input bias and offset are useful in higher-impedance threshold networks where resistor current and source impedance would otherwise create measurable trip-point error.
Because the outputs remain open collector, the B version does not remove the need for pull-up design. The IDR suffix selects industrial-temperature SOIC-8 on a 2500-piece reel.
For related devices, see HKEQGOO’s Comparators category.
Technical Specifications
| Parameter | Verified Information |
|---|---|
| Manufacturer | Texas Instruments |
| Exact MPN | LM2903BIDR |
| Channels | 2 comparators |
| Maximum Rating | Up to 38 V stated for B version |
| Input Offset | 0.37 mV stated improved B-version value |
| Input Bias | 3.5 nA stated |
| Supply Current | 200 µA per comparator stated |
| Response | 1 µs stated B-version response |
| Output | Open-collector; common-mode range includes ground |
| Exact Package / Packing | SOIC (D), 8 pins; 2500-piece large reel; −40°C to +125°C; marking L2903B |
| Manufacturer Status | Active / Production |
| Part Marking | L2903B |
Functional Highlights
B-generation improvements reduce threshold error
Lower offset and bias current can tighten trip thresholds without changing the basic resistor-divider topology.
38-V-class rating expands high-voltage supervisory use
The comparator can monitor higher-voltage analog systems while the open-collector output is pulled up to a lower logic rail.
Design Considerations
- Recalculate hysteresis thresholds if migrating from a legacy comparator with different input current/offset.
- Keep the pull-up within output sink-current and logic-rise-time requirements.
- Common-mode includes ground but still has an upper-rail limitation that must be checked.
Product Status and Exact Order Code
Manufacturer status: Active / Production
Texas Instruments lists LM2903BIDR as Active / Production; SOIC (D), 8 pins; 2500-piece large tape and reel; −40°C to +125°C; marking L2903B.
Related Engineering Resources
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