AISPEECH YT2216 Smart Voice Interaction Chip: Highly Integrated Bluetooth 5.3 + Single-Mic Offline AI Voice Solution
Keywords: YT2216 | Offline Voice Recognition IC | Bluetooth V5.3 SoC | Low-Power AI Voice | Smart Home Appliance Voice Solution | AISPEECH Algorithm Chip | Single-Microphone Offline Scheme
Product Overview: YT2216 is an integrated SoC solution (chip + embedded algorithm) developed by AISPEECH for smart voice interaction. It adopts a 240MHz 32-bit FPU processor with 2MB on-board Flash and 256KB SRAM. Integrated with Bluetooth 5.3 and high-performance 2-channel DAC / 1-channel ADC audio Codec, it supports single-microphone offline wake-up and up to 150 custom command words. It targets IoT smart home appliances and battery-powered portable consumer electronics. GSMicro Semiconductor supplies genuine in-stock units, full SDK and reference design support.
⚡ Key Specifications Summary
✔ Core Product Advantages
① Hardware-Software Integrated AI Voice – Deeply integrated AISPEECH voice algorithm, 5m household far-field pickup, noise suppression, supports up to 150 offline command words without internet access. Recognition rate ≥95% in normal household scenarios, ≥90% in noisy environments such as cooking fume or fan noise[citation:5].
② High Integration & Low BOM Cost – On-chip 2MB Flash and 256KB SRAM. Single-chip integrates Bluetooth, PMU, audio Codec and MIC bias. A complete solution can be built with only a small number of resistors & capacitors, 24MHz crystal, microphone, amplifier and speaker.
③ Full-Featured Bluetooth 5.3 – Supports A2DP/AVRCP/HFP/SPP/HID, max transmit power +6dBm, sensitivity -90dBm for stable wireless audio and voice control connection.
④ Rich Peripherals & High Expandability – USB1.1, SDIO, 3×UART, 2×SPI, I2C, PWM, CapSense and 10-bit ADC, flexible for home appliances and consumer electronics.
⑤ Low Power Consumption + Charging Management – Direct lithium battery supply supported. Built-in linear charger with programmable current 20mA~320mA. Deep sleep current down to 30µA, ideal for battery-powered products.
YT2216 Internal Functional Block Diagram
240MHz
2×DAC / 1×ADC
20~320mA Programmable
*Built-in MIC bias. DAC supports capless output mode, differential and single-ended output. It can directly drive a 16Ω speaker at 20mW.
Detailed Electrical & Performance Specifications
| Parameter Category | Specifications | Test Conditions / Remarks |
|---|---|---|
| Supply Voltage | VBAT 3.0V ~ 5.5V | LDO_IN Charging Input 4.5~6.5V |
| DAC Performance | SNR 95dB, THD+N -75dB | 1KHz/0dB, 10KΩ Load |
| ADC Performance | SNR 90dB, Dynamic Range 80dB | Fs=44.1kHz |
| Bluetooth Tx Power | Max +6dBm | Class1/2/3 Supported |
| GPIO Drive Strength | Up to 24mA (PA Bank) | PB5 5V Tolerant |
| Charging Current | 20mA~320mA Programmable | Fast Charge Mode |
| Standby / Sleep Current | Voice standby sleep ＜120µA, deep sleep down to 30µA | Refer to official datasheet |
Pin Definition (SOP16)
| Pin# | Name | I/O Type | Main Function |
|---|---|---|---|
| 1 | DACRO | AO | DAC Right Channel Output / PA5 (GPIO/PWM) |
| 2 | LDOIN | P | 5V Charging Input (PB5 5V Tolerant GPIO) |
| 3 | VBAT | P | Main Power Supply 3.0~5.5V |
| 4 | VDDIO | P | IO Power 2.2~3.6V |
| 5 | VSS | G | Digital Ground |
| 6 | BT_RF | RF | Bluetooth Antenna Port |
| 7 | BT_OSCI | I | Crystal Oscillator Input |
| 8 | BT_OSCO | O | Crystal Oscillator Output |
| 9 | USBDM/PA9 | I/O | USB D- / GPIO / SDIO CMD |
| 10 | USBDP/PA10 | I/O | USB D+ / GPIO / I2C_SDA |
| 11 | MIC_BIAS/ADC0 | AI/O | Microphone Bias / Analog Input / Touch0 |
| 12 | AUDIO_ADC_IN | AI | Mono Analog MIC Input |
| 13 | DACL | AO | DAC Left Channel Output (Default Audio) |
| 14 | PA1/CLKOUT | I/O | GPIO/PWM/UART Function |
| 15 | PA0/TOUCH1 | I/O | CapSense Touch Channel 1 / PWM |
| 16 | PB1/UART0_TX | I/O | Pull-up by default, UART Log / Debug |
Package Dimension (SOP16)
• Body Width: 3.9mm (Typ.) • Body Length: 9.9mm
• Pin Pitch: 1.27mm • Max Height: 1.75mm
• Package Code: SOP16‑150mil
(Refer to official datasheet for full dimensions, JEDEC compliant)
Typical Application Circuit & Single-Mic Offline Voice Solution
YT2216 Single-Mic Offline Voice Solution (Recommended Architecture) – Only a small number of external components are required to implement high-performance voice wake-up / command recognition plus Bluetooth audio, suitable for small home appliances and battery-powered IoT devices.
Key Connection Notes:
▪ Power Supply: VBAT connects to lithium battery (3.7~4.2V) or DC 5V; LDOIN for 5V charging input; VDDIO outputs 3.3V for peripherals.
▪ Crystal: 24MHz crystal connected to BT_OSCI/BT_OSCO with 10~12pF load capacitors.
▪ Microphone: Differential / single-ended MIC connected to MIC_BIAS and AUDIO_ADC_IN, with built-in bias voltage.
▪ Audio Output: DACL/DACRO drives amplifier (e.g. NS4150) to speaker, capless output supported.
▪ Antenna: BT_RF connects to π matching network + ceramic antenna or PCB antenna.
▪ Debug / Upgrade: UART0 (PB1/PB0) for log output; USB supports firmware upgrade.
| Component | Spec | Qty |
|---|---|---|
| YT2216 | SOP16 | 1 |
| Crystal | 24MHz ±20ppm | 1 |
| Amplifier | NS4150/CS8121S | 1 |
| Microphone | Analog Electret / Silicon MIC | 1 |
| Speaker | 4Ω~16Ω / 2W~5W | 1 |
| Resistors, Capacitors & Inductors | Standard 0402/0603 | As Required |
Design Note: PA5 is set as amplifier enable pin by default in SDK, DACL as primary audio output, DACRO configurable to high-impedance. It supports 16Ω speaker with max output 20mW, suitable for small home appliance projects.
Typical Application Scenarios
Supported Product Types: Various white goods, small home appliances and control panels. YT2216 enables offline command recognition and Bluetooth audio playback for voice control of device on/off and gear adjustment.
Development Support
✅ Full SDK and voice model tuning tools available, support custom wake word and local offline command words (≤150).
✅ Hardware reference design, schematic and PCB layout guidelines available upon request from GSMicro Semiconductor.
✅ UART/GPIO control for external devices, PWM dimming & speed regulation, CapSense touch key expansion.
✅ Mass production programming tool and fast deployment of offline voice library to lower development barriers.
Compatible Replacement & Product Comparison
| Item | YT2216 | CI1102 (Chipsing) | Jerry AC695N |
|---|---|---|---|
| Bluetooth Version | V5.3, A2DP/AVRCP/HFP/SPP/HID | No Bluetooth | Bluetooth 5.x Dual Mode (depends on model/firmware) |
| On-Chip Flash | 2MB Flash + 256KB SRAM, No External SPI Flash Required | External QSPI Nor Flash Required (512KB SRAM On-Chip) | External Flash Required |
| Voice Algorithm Integration | AISPEECH Custom Algorithm (Local Recognition + Noise Reduction + 5m Far-Field) | Chipsing BNPU Neural Processor | Requires Third-Party Porting / External Algorithm |
| DAC SNR | 95dB | Refer to Datasheet | Refer to Datasheet |
| Charging Management | Built-in Linear Charger 20~320mA, Direct Lithium Battery Support | No Built-in Charger | Built-in on Selected Models |
| Package / Sleep Power | SOP16, Deep Sleep 30µA | QFN56 (7×7mm), External Power Management Needed | Package & Sleep Current Model-Dependent |
GSMicro Recommendation for YT2216: Targeting compact smart home appliances and battery-powered IoT devices. YT2216 integrates 2MB Flash + 256KB SRAM on-chip to eliminate external memory and shrink PCB size. Combined with Bluetooth 5.3 and lithium charging management, it delivers offline voice recognition and Bluetooth audio in a single chip. Deep sleep down to 30µA, ideal for offline voice projects pursuing low BOM cost and ultra-low standby power.
FAQ (YT2216)
Q1: Does YT2216 support offline multi-turn dialogue?
A: Yes. Multi-turn conversation is available with AISPEECH algorithm, recognition latency ＜150ms, cloud connection not required.
Q2: Is an external amplifier required for development?
A: DAC outputs analog signal. An external 2~5W amplifier (such as NS4150) is recommended to drive speakers. The DAC can also directly drive 16Ω earphones or small speakers at 20mW for low-power applications.
Q3: How to adjust charging current?
A: Configured via register, programmable from 20mA to 320mA for lithium batteries of different capacities. Built-in linear charger, simply connect LDO_IN to 5V charging source.
Q4: Can it connect to Alibaba Cloud / Tencent Cloud?
A: This chip focuses on offline recognition and Bluetooth audio. Cloud connectivity can be realized by adding an external MCU or Wi-Fi expansion module. GSMicro can provide reference designs.
Q5: Is YT2216 pin-compatible with CI1103?
A: Not pin-to-pin compatible, but functionally substitutable. YT2216 has better integration of Bluetooth 5.3 and charging management. Software migration is required; GSMicro supports migration service.
Q6: What alternatives are available for YT2216? Which mainstream offline voice ICs can it replace?
A: YT2216 can replace multiple single-mic offline voice chips. Compared with competitors without Bluetooth or requiring external Flash, YT2216 has comprehensive advantages in Bluetooth 5.3 integration, on-chip 2MB Flash+256KB SRAM, built-in lithium charger and 30µA deep sleep current, helping reduce BOM and PCB footprint. For replacement selection, consult GSMicro FAE with your requirements: Bluetooth audio, battery power, command word quantity and package size.
Q7: How to reduce standby power for battery-powered portable products?
A: YT2216 supports multi-level power management: voice standby sleep ＜120µA, deep sleep down to 30µA. Proper sleep configuration plus integrated charging management balances long standby and fast wake-up, suitable for portable massagers, Bluetooth voice toys and similar products.
Q8: What is the relationship between AISPEECH and GSMicro Semiconductor?
A: AISPEECH is the original manufacturer and algorithm provider of YT2216. GSMicro Semiconductor (Shenzhen) Co., Ltd. is an authorized AISPEECH distributor, supplying genuine stock, full SDK, reference design and FAE technical support. GSMicro is our own brand and has no relation with SGMICRO.
Ordering Information
Key Partner & Technical Support — GSMicro Semiconductor (Shenzhen) Co., Ltd.
GSMicro Semiconductor (Shenzhen) Co., Ltd. (“GSMicro”) was founded in 2023, evolved from LUMENCHIP established in 2010. Headquartered in Shenzhen, China’s tech hub, we are an analog IC integrated service brand focusing on mixed-signal chip development and mass deployment to advance green intelligent technology.
GSMicro combines global business models and supply channels, breaking the traditional pure distribution & agency mode. We operate both authorized agent lines and proprietary product lines, integrating component distribution and turnkey support. Customer-centric, we deliver customized IC products and technical services worldwide. Our authorized partners include DONGWOON (Korea), PowTech (CR MICRO), CRHJ, APM, COOLSEMI, ANHI, Reasunos, OCX, MassChip, XLSEMI, Hichips, NSIWAY, EGmicro, Ruimeng Technology, ChipWays, AISPEECH, Aerosemi and more.
GSMicro maintains a complete product portfolio including MCUs, power management ICs, AI voice chips, signal-chain ICs and power discrete devices, covering signal processing, offline voice wake-up, speech recognition, speech synthesis, knowledge graph and intelligent dialogue.
Brand Notice: GSMicro (GuangShengWei Semiconductor) and SGMICRO (SG Micro Corp.) are two independent companies with no equity, brand or business affiliation. AISPEECH is the original manufacturer of YT2216.
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