component
AD156A4
Public Made by Adomby adom
JieLi Tech Microcontrollers (MCU/MPU/SOC), QFN-32(4x4). 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
markdownAD156A4
JieLi Tech · Microcontrollers (MCU/MPU/SOC) · QFN-32(4x4)
AD156A4 from JieLi Tech, in a QFN-32(4x4). 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 | PA1 | bidirectional | GPIO with 8/64 mA drive; multiplexed with ADC1, SPI0CLKB, SD0CLKA, UART0RXB, I2C_SCL(B) and CAP2. |
| 2 | PA0 | bidirectional | GPIO with 8/64 mA drive, default pull-up, used for Long Press Reset; multiplexed with ADC0 and UART0TXB. |
| 3 | VDDIO | power_out | Digital power pin, internal linear regulator output of 2.0 V to 3.4 V (typ 3.0 V) with up to 100 mA load at VBAT=3.7 V. |
| 4 | VBAT | power_in | Battery power supply input, 2.0 V to 5.5 V operating, absolute maximum 5.5 V. |
| 5 | DACP | output | Class-D audio power amplifier positive output. |
| 6 | DACN | output | Class-D audio power amplifier negative output. |
| 7 | PB11 | bidirectional | High-voltage-resistance GPIO with 8 mA drive; also OSCIB crystal oscillator input (B). |
| 8 | PB10 | bidirectional | High-voltage-resistance GPIO with 8 mA drive, default pull-up; also MCLR (active low reset). |
| 9 | PB9 | bidirectional | High-voltage-resistance GPIO with 8 mA drive; multiplexed with SPI1DOD, UART1TRXB, I2C_SDA(D) and CAP1. |
| 10 | PB8 | bidirectional | High-voltage-resistance GPIO with 8 mA drive; multiplexed with SPI1CLKD, I2C_SCL(D) and OSCIA crystal oscillator input (A). |
| 11 | PB7 | bidirectional | GPIO with 8/64 mA drive; also SPI1DID (SPI1 data in D). |
| 12 | PB6 | bidirectional | GPIO with 8/64 mA drive; also SD0DATC (SD0 data C). |
| 13 | PB5 | bidirectional | GPIO with 8/64 mA drive; multiplexed with ADC13 and SD0CMDC. |
| 14 | PB4 | bidirectional | GPIO with 8/64 mA drive; multiplexed with ADC12 and SD0CLKC. |
| 15 | PB3 | bidirectional | GPIO with 8/64 mA drive; also TDM_MCLK. |
| 16 | PB2 | bidirectional | GPIO with 8/64 mA drive; multiplexed with SPI1DIA, SD0DATB and TDM_DAT. |
| 17 | PB1 | bidirectional | GPIO with 8/64 mA drive, default pull-down; multiplexed with ADC11, SPI1DOA, SD0CMDB, I2C_SDA(A) and TDM_SYN. |
| 18 | PB0 | bidirectional | GPIO with 8/64 mA drive, default pull-down; multiplexed with ADC10, SPI1CLKA, SD0CLKB, I2C_SCL(A) and TDM_CLK. |
| 19 | PA15 | bidirectional | GPIO with 8/64 mA drive; multiplexed with ADC9, SPI1DOB and MCAP3. |
| 20 | PA14 | bidirectional | GPIO with 8/64 mA drive; multiplexed with ADC8, SPI1CLKB, CAP0 and MCAP2. |
| 21 | PA13 | bidirectional | GPIO with 8/64 mA drive; multiplexed with SPI1DIB, TMR1 and MCAP1. |
| 22 | PA12 | bidirectional | GPIO with 8/64 mA drive; also MPWM3 (PWM channel 3 output). |
| 23 | PA11 | bidirectional | GPIO with 8/64 mA drive; multiplexed with TMR0 and MPWM2. |
| 24 | PA10 | bidirectional | GPIO with 8/64 mA drive; no alternate functions listed. |
| 25 | PA9 | bidirectional | GPIO with 8/64 mA drive; no alternate functions listed. |
| 26 | PA8 | bidirectional | GPIO with 8/64 mA drive; multiplexed with SPI1DIC and SD0DATD. |
| 27 | PA7 | bidirectional | GPIO with 8/64 mA drive; multiplexed with ADC7, SPI1DOC, SD0CMDD, UART0RXA, I2C_SDA(C) and MPWM1. |
| 28 | PA6 | bidirectional | GPIO with 8/64 mA drive; multiplexed with ADC6, SPI1CLKC, SD0CLKD, UART0TXA, I2C_SCL(C), TMR2 and MPWM0. |
| 29 | PA5 | bidirectional | GPIO with 8/64 mA drive; multiplexed with ADC5, SPI0DAT3 and UART1RXA. |
| 30 | PA4 | bidirectional | GPIO with 8/64 mA drive; multiplexed with ADC4, SPI0DAT2, UART1TXA and LVD (low voltage detect). |
| 31 | PA3 | bidirectional | GPIO with 8/64 mA drive; multiplexed with ADC3, SPI0DIB(1), SD0DATA, CLKOUT, PWM2(B) and MCAP0. |
| 32 | PA2 | bidirectional | GPIO with 8/64 mA drive; multiplexed with ADC2, SPI0DOB(0), SD0CMDA, I2C_SDA(B) and PWM2(A). |
| 33 | VSS | power_in | Exposed ground pad (PAD VSS). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | JieLi Tech |
| Package | QFN-32(4x4) |
| Category | Embedded Processors & Controllers |
| Pins | 33 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Ambient Temperature | Tamb | -40 | 85 | °C | 7 | ||
| Storage temperature | Tstg | -65 | 150 | °C | 7 | ||
| Supply Voltage | VBAT | -0.3 | 5.5 | V | 7 | ||
| 3.3V IO Input Voltage | VVDDIO33 | -0.3 | 3.6 | V | 7 | ||
| Voltage Input | VBAT | 2 | 3.7 | 5.5 | V | 7 | |
| Voltage output | VVDDIO | 2 | 3 | 3.4 | V | VBAT = 3.7V, 100mA loading | 7 |
| Loading current | IVDDIO | 100 | mA | VBAT=3.7V | 7 | ||
| Low-Level Input Voltage | VIL | -0.3 | V | VDDIO = 3.3V | 7 | ||
| Low-Level Output Voltage | VOL | 0.33 | V | VDDIO = 3.3V | 7 | ||
| High-Level Output Voltage | VOH | 2.7 | V | VDDIO = 3.3V | 7 | ||
| Internal Pull-Up Resistor (PA0 |
10 | K | PA0 |
8 | |||
| Internal Pull-Down Resistor (PA0 |
60 | K | PA0 |
8 | |||
| Internal Pull-Up Resistor (PB8~PB11) | 10 | K | PB8~PB11; accuracy ±20% | 8 | |||
| Internal Pull-Down Resistor (PB8~PB11) | 60 | K | PB8~PB11; accuracy ±20% | 8 | |||
| Internal pull-up/pull-down resistance accuracy | -20 | 20 | % | internal pull-up/pull-down resistance | 8 | ||
| Soft-off current | 2 | uA | 2 | ||||
| Working voltage VBAT | VBAT | 2 | 5.5 | V | 2 | ||
| Working voltage VDDIO | VDDIO | 2 | 3.4 | V | 2 | ||
| Operating Temperature | -40 | 85 | °C | 2 | |||
| Main frequency | 120 | MHz | 2 |
CAD (KiCad official)
- Symbol:
AD156A4 - Footprint:
Package_DFN_QFN:QFN-32-1EP_4x4mm_P0.4mm_EP2.9x2.9mm - 3D model: QFN-32(4x4) (KiCad packages3D, STEP)
- 3D model files:
ad156a4-etched.step/ad156a4-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ad156a4.step/ad156a4.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: JieLi Tech datasheet (10 pp, sha256
3fcbf159b92a3850, 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).