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IS31AP4991A-SLS2-TR
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ISSI Integrated Silicon Solution Audio Amplifiers, MSOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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IS31AP4991A-SLS2-TR
ISSI Integrated Silicon Solution · Audio Amplifiers · MSOP-8
IS31AP4991A-SLS2-TR from ISSI Integrated Silicon Solution, in a MSOP-8. 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 | SDB | input | Active-low shutdown input; the device enters shutdown mode when a low level is applied, with VSD_L max 0.4V at VCC=2.7V and VSD_H min 1.4V at VCC=5.5V. |
| 2 | BYPASS | passive | Bypass capacitor pin that provides the common-mode bias voltage (VCC/2); the datasheet tests use CBYPASS = 0.47µF. |
| 3 | IN+ | input | Positive input of the first amplifier stage. |
| 4 | IN- | input | Negative input of the first amplifier stage, receiving the audio input signal; connected to the feedback resistor RF and the input resistor RIN. |
| 5 | OUT- | output | Negative BTL output, connected to the load and to the feedback resistor RF. |
| 6 | VCC | power_in | Positive analog supply; operating range 2.7V to 5.5V, absolute maximum 6.0V. |
| 7 | GND | power_in | Ground reference for the device. |
| 8 | OUT+ | output | Positive BTL output, connected to the load; phased 180° relative to VIN. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | ISSI Integrated Silicon Solution |
| Package | MSOP-8 |
| Category | Amplifiers/Comparators |
| Pins | 8 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Quiescent power supply current | ICC | 3 | mA | VCC=5V table, TA=25°C; VCC = 0V, Io = 0A, no Load | 5 | ||
| Shutdown current | ISDB | 1 | μA | VCC=5V table, TA=25°C; VSDB = GND, RL = ∞ | 5 | ||
| Shutdown voltage input high | VSD_H | 1.4 | V | VCC = 5.5V | 5 | ||
| Shutdown voltage input low | VSD_L | 0.4 | V | VCC = 2.7V | 5 | ||
| Output offset voltage | VOS | 15 | mV | VCC=5V table, TA=25°C | 5 | ||
| Output power (8Ω) | Po | 1.15 | W | VCC=5V table, TA=25°C; THD+N = 1%; f = 1kHz | 5 | ||
| Output power (8Ω) | Po | 1.4 | W | VCC=5V table, TA=25°C; THD+N = 10%; f = 1kHz | 5 | ||
| Total harmonic distortion+noise | THD+N | 0.074 | % | VCC=5V table; Po = 0.5Wrms; f = 1kHz; Note 4 (guaranteed by design) | 5 | ||
| Power supply rejection ratio | PSRR | 56 | dB | VCC=5V table; Vripple p-p = 200mV; Input Grounded; f = 217Hz; Note 4 | 5 | ||
| Power supply rejection ratio | PSRR | 68 | dB | VCC=5V table; Vripple p-p = 200mV; Input Grounded; f = 1kHz; Note 4 | 5 | ||
| Quiescent power supply current | ICC | 2.2 | mA | VCC=3V table, TA=25°C; VCC = 0V, Io = 0A, no Load | 5 | ||
| Output power (8Ω) | Po | 380 | mW | VCC=3V table, TA=25°C; THD+N = 1%; f = 1kHz | 5 | ||
| Output power (8Ω) | Po | 490 | mW | VCC=3V table, TA=25°C; THD+N = 10%; f = 1kHz | 5 | ||
| Total harmonic distortion+noise | THD+N | 0.076 | % | VCC=3V table; Po = 0.3Wrms; f = 1kHz; Note 4 (guaranteed by design) | 5 | ||
| Wake-up time | tWU | 100 | 250 | ms | VCC=5V table; CBYPASS = 0.47μF; Note 4 | 5 | |
| Wake-up time | tWU | 90 | 200 | ms | VCC=3V table; CBYPASS = 0.47μF; Note 4 | 5 | |
| Supply voltage | VCC | -0.3 | 6 | V | 5 | ||
| Voltage at any input pin | -0.3 | V | Max printed as VCC+0.3V | 5 | |||
| Maximum junction temperature | TJMAX | 150 | °C | 5 | |||
| Storage temperature range | TSTG | -65 | 150 | °C | 5 | ||
| Operating temperature range | TA | -40 | 85 | °C | 5 | ||
| Maximum power dissipation, MSOP-8 | 590 | mW | MSOP-8, 25°C ambient; Note 2 (JESD51 2s2p board) | 5 | |||
| Maximum power dissipation, MSOP-8 | 310 | mW | MSOP-8, 85°C ambient; Note 2 (JESD51 2s2p board) | 5 | |||
| Supply voltage operating range | VCC | 2.7 | 5.5 | V | Operating from VCC = 2.7V ~ 5.5V (Features) | 1 |
CAD (KiCad official)
- Symbol:
IS31AP4991A-SLS2-TR - Footprint:
Package_SO:MSOP-8_3x3mm_P0.65mm - 3D model: MSOP-8 (KiCad packages3D, STEP)
- 3D model files:
is31ap4991a-sls2-tr-etched.step/is31ap4991a-sls2-tr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);is31ap4991a-sls2-tr.step/is31ap4991a-sls2-tr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: ISSI Integrated Silicon Solution datasheet (11 pp, sha256
83af76838ceb7a34, 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).
# IS31AP4991A-SLS2-TR
**ISSI Integrated Silicon Solution** · Audio Amplifiers · MSOP-8
IS31AP4991A-SLS2-TR from ISSI Integrated Silicon Solution, in a MSOP-8. 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 | SDB | input | Active-low shutdown input; the device enters shutdown mode when a low level is applied, with VSD_L max 0.4V at VCC=2.7V and VSD_H min 1.4V at VCC=5.5V. |
| 2 | BYPASS | passive | Bypass capacitor pin that provides the common-mode bias voltage (VCC/2); the datasheet tests use CBYPASS = 0.47µF. |
| 3 | IN+ | input | Positive input of the first amplifier stage. |
| 4 | IN- | input | Negative input of the first amplifier stage, receiving the audio input signal; connected to the feedback resistor RF and the input resistor RIN. |
| 5 | OUT- | output | Negative BTL output, connected to the load and to the feedback resistor RF. |
| 6 | VCC | power_in | Positive analog supply; operating range 2.7V to 5.5V, absolute maximum 6.0V. |
| 7 | GND | power_in | Ground reference for the device. |
| 8 | OUT+ | output | Positive BTL output, connected to the load; phased 180° relative to VIN. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | ISSI Integrated Silicon Solution |
| Package | MSOP-8 |
| Category | Amplifiers/Comparators |
| Pins | 8 |
## Electrical characteristics
Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Quiescent power supply current | ICC | | | 3 | mA | VCC=5V table, TA=25°C; VCC = 0V, Io = 0A, no Load | 5 |
| Shutdown current | ISDB | | | 1 | μA | VCC=5V table, TA=25°C; VSDB = GND, RL = ∞ | 5 |
| Shutdown voltage input high | VSD_H | 1.4 | | | V | VCC = 5.5V | 5 |
| Shutdown voltage input low | VSD_L | | | 0.4 | V | VCC = 2.7V | 5 |
| Output offset voltage | VOS | | | 15 | mV | VCC=5V table, TA=25°C | 5 |
| Output power (8Ω) | Po | 1.15 | | | W | VCC=5V table, TA=25°C; THD+N = 1%; f = 1kHz | 5 |
| Output power (8Ω) | Po | 1.4 | | | W | VCC=5V table, TA=25°C; THD+N = 10%; f = 1kHz | 5 |
| Total harmonic distortion+noise | THD+N | | | 0.074 | % | VCC=5V table; Po = 0.5Wrms; f = 1kHz; Note 4 (guaranteed by design) | 5 |
| Power supply rejection ratio | PSRR | 56 | | | dB | VCC=5V table; Vripple p-p = 200mV; Input Grounded; f = 217Hz; Note 4 | 5 |
| Power supply rejection ratio | PSRR | 68 | | | dB | VCC=5V table; Vripple p-p = 200mV; Input Grounded; f = 1kHz; Note 4 | 5 |
| Quiescent power supply current | ICC | | | 2.2 | mA | VCC=3V table, TA=25°C; VCC = 0V, Io = 0A, no Load | 5 |
| Output power (8Ω) | Po | 380 | | | mW | VCC=3V table, TA=25°C; THD+N = 1%; f = 1kHz | 5 |
| Output power (8Ω) | Po | 490 | | | mW | VCC=3V table, TA=25°C; THD+N = 10%; f = 1kHz | 5 |
| Total harmonic distortion+noise | THD+N | | | 0.076 | % | VCC=3V table; Po = 0.3Wrms; f = 1kHz; Note 4 (guaranteed by design) | 5 |
| Wake-up time | tWU | | 100 | 250 | ms | VCC=5V table; CBYPASS = 0.47μF; Note 4 | 5 |
| Wake-up time | tWU | | 90 | 200 | ms | VCC=3V table; CBYPASS = 0.47μF; Note 4 | 5 |
| Supply voltage | VCC | -0.3 | | 6 | V | | 5 |
| Voltage at any input pin | | -0.3 | | | V | Max printed as VCC+0.3V | 5 |
| Maximum junction temperature | TJMAX | | | 150 | °C | | 5 |
| Storage temperature range | TSTG | -65 | | 150 | °C | | 5 |
| Operating temperature range | TA | -40 | | 85 | °C | | 5 |
| Maximum power dissipation, MSOP-8 | | | | 590 | mW | MSOP-8, 25°C ambient; Note 2 (JESD51 2s2p board) | 5 |
| Maximum power dissipation, MSOP-8 | | | | 310 | mW | MSOP-8, 85°C ambient; Note 2 (JESD51 2s2p board) | 5 |
| Supply voltage operating range | VCC | 2.7 | | 5.5 | V | Operating from VCC = 2.7V ~ 5.5V (Features) | 1 |
## CAD (KiCad official)
- Symbol: `IS31AP4991A-SLS2-TR`
- Footprint: `Package_SO:MSOP-8_3x3mm_P0.65mm`
- 3D model: MSOP-8 (KiCad packages3D, STEP)
- 3D model files: `is31ap4991a-sls2-tr-etched.step` / `is31ap4991a-sls2-tr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `is31ap4991a-sls2-tr.step` / `is31ap4991a-sls2-tr.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [ISSI Integrated Silicon Solution datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590424674531377152) (11 pp, sha256 `83af76838ceb7a34`, retrieved 2026-10-18, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-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).
[Datasheet PDF](docs/is31ap4991a-sls2-tr-datasheet.pdf)