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RS321BKXC5
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Jiangsu RUNIC Tech Operational Amplifier, SOT-353. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownRS321BKXC5
Jiangsu RUNIC Tech · Operational Amplifier · SOT-353
RS321BKXC5 from Jiangsu RUNIC Tech, in a SOT-353. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | +IN | input | Positive (noninverting) input; signal input pins are diode-clamped to the supply rails and must stay within (V-)-0.5V to (V+)+0.5V, with input currents limited to 10mA when swinging more than 0.5V beyond the rails. |
| 2 | V- | power_in | Negative (lowest) power supply; single-supply operation spans 2.5V to 5.5V with (V+)-(V-) absolute maximum of 7V. |
| 3 | -IN | input | Negative (inverting) input; signal input pins are diode-clamped to the supply rails and must stay within (V-)-0.5V to (V+)+0.5V, with input currents limited to 10mA when swinging more than 0.5V beyond the rails. |
| 4 | OUT | output | Output; output terminals are diode-clamped to the supply rails, and output signals swinging more than 0.5V beyond the rails should be current-limited to ±140mA or less. |
| 5 | V+ | power_in | Positive (highest) power supply; single-supply operation spans 2.5V to 5.5V with (V+)-(V-) absolute maximum of 7V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Jiangsu RUNIC Tech |
| Package | SOT-353 |
| Category | Amplifiers/Comparators |
| Pins | 5 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Supply voltage, absolute maximum | Vs | 7 | V | Supply, Vs=(V+)-(V-) | 3 | ||
| Signal input pin current | -10 | 10 | mA | Signal input pin | 3 | ||
| Signal output pin current | -140 | 140 | mA | Signal output pin | 3 | ||
| Operating temperature range | TA | -40 | 125 | °C | Operating free-air temperature range | 3 | |
| Junction temperature | TJ | 150 | °C | Junction | 3 | ||
| Storage temperature range | Tstg | -65 | 150 | °C | Storage | 3 | |
| Electrostatic discharge, human-body model | V(ESD) | -3000 | 3000 | V | Human-body model (HBM) | 3 | |
| Electrostatic discharge, machine model | V(ESD) | -200 | 200 | V | Machine Model (MM) | 3 | |
| Supply voltage, single-supply | Vs | 2.5 | 5.5 | V | Single-supply | 3 | |
| Supply voltage, dual-supply | Vs | 1.25 | 2.75 | V | Dual-supply; printed as ±1.25 (MIN) and ±2.75 (MAX) | 3 | |
| Operating voltage range | Vs | 2.5 | 5.5 | V | 25C | 5 | |
| Quiescent current per amplifier | IQ | 85 | 140 | uA | 25C | 5 | |
| Power-supply rejection ratio | PSRR | 70 | 75 | dB | Vs=2.5V to 5.5V, VCM=(V-)+0.5V, 25C | 5 | |
| Power-supply rejection ratio | PSRR | 64 | dB | Vs=2.5V to 5.5V, VCM=(V-)+0.5V, -40C to 125C | 5 | ||
| Input offset voltage | Vos | -4.5 | 0.8 | 4.5 | mV | VCM=0V to 3.5V, 25C | 5 |
| Common-mode voltage range | VCM | -0.1 | 5.6 | V | Vs= 5.5V, 25C | 5 | |
| Common-mode rejection ratio | CMRR | 65 | 85 | dB | Vs= 5.5V, VCM=-0.1V to 4V, 25C | 5 | |
| Common-mode rejection ratio | CMRR | 62 | dB | Vs= 5.5V, VCM=-0.1V to 4V, -40C to 125C | 5 | ||
| Common-mode rejection ratio | CMRR | 58 | 80 | dB | Vs= 5.5V, VCM=-0.1V to 5.6V, 25C | 5 | |
| Common-mode rejection ratio | CMRR | 56 | dB | Vs= 5.5V, VCM=-0.1V to 5.6V, -40C to 125C | 5 | ||
| Open-loop voltage gain | AOL | 85 | 95 | dB | RL=2KΩ, Vo=0.15V to 4.85V, 25C | 5 | |
| Open-loop voltage gain | AOL | 75 | dB | RL=2KΩ, Vo=0.15V to 4.85V, -40C to 125C | 5 | ||
| Open-loop voltage gain | AOL | 88 | 100 | dB | RL=10KΩ, Vo=0.05V to 4.95V, 25C | 5 | |
| Open-loop voltage gain | AOL | 80 | dB | RL=10KΩ, Vo=0.05V to 4.95V, -40C to 125C | 5 | ||
| Output swing from rail | 25 | mV | RL=2KΩ, 25C | 5 | |||
| Output swing from rail | 8 | mV | RL=10KΩ, 25C | 5 | |||
| Input offset voltage average drift | Vos TC | 2 | uV/C | -40C to 125C | 5 | ||
| Junction-to-ambient thermal resistance, SOT353(SC70-5) | RϴJA | 214.7 | °C/W | SOT353(SC70-5) package | 3 | ||
| Junction-to-case (top) thermal resistance, SOT353(SC70-5) | RϴJC(top) | 127.1 | °C/W | SOT353(SC70-5) package | 3 | ||
| Junction-to-board thermal resistance, SOT353(SC70-5) | RϴJB | 60 | °C/W | SOT353(SC70-5) package | 3 | ||
| Junction-to-top characterization parameter, SOT353(SC70-5) | ѰJT | 33.4 | °C/W | SOT353(SC70-5) package | 3 | ||
| Junction-to-board characterization parameter, SOT353(SC70-5) | ѰJB | 59.8 | °C/W | SOT353(SC70-5) package | 3 |
CAD (KiCad official)
- Symbol:
RS321BKXC5 - Footprint:
Package_TO_SOT_SMD:SOT-353_SC-70-5 - 3D model: SOT-353 (KiCad packages3D, STEP)
- 3D model files:
rs321bkxc5-etched.step/rs321bkxc5-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);rs321bkxc5.step/rs321bkxc5.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Jiangsu RUNIC Tech datasheet (10 pp, sha256
0c34920a86e07131, retrieved 2026-10-18, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-5-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).