ISSI entered Bluetooth in 2002 through a deal with Signia Technologies that combined chip manufacturing, product licensing, and an equity investment. ISSI planned to invest $3 million for about 15% of Signia, manufacture Signia-designed products, and license its initial Bluetooth products worldwide. The move expanded beyond ISSI’s memory business, but it did not last: ISSI exited Bluetooth in fiscal 2006, selling the assets and most of its Signia stake.
What was the ISSI–Signia deal?
On May 30, 2002, ISSI announced an agreement with privately held Signia Technologies. The arrangement gave ISSI several roles at once: it would invest in Signia, manufacture Signia-designed Bluetooth products, and receive worldwide rights to license Signia’s initial products. ISSI also gained the right to develop additional Bluetooth products using Signia technology. EDN’s 2002 announcement described the arrangement.
- Planned investment: $3 million, structured to give ISSI a 15% stake and a seat on Signia’s board.
- Investment timing: ISSI had already invested $1 million; the remaining $2 million was to follow Signia’s next financing round.
- Product rights: Worldwide licensing rights for Signia’s initial products, plus the right to develop further Bluetooth products based on Signia technology.
- Manufacturing: ISSI was to manufacture the Signia-designed products.
At the time, the companies described the chipset as still undergoing characterization and certification. They said initial shipments could begin as early as October 2002; that was a projected start, not confirmation that shipments began then. The chips were to be fabricated at Taiwan Semiconductor Manufacturing Co. (TSMC), which ISSI already used for SRAM and network-search products. EDN reported these plans in 2002.
Why did ISSI pursue Bluetooth?
ISSI presented Bluetooth as a way to broaden its product range beyond memory semiconductors. Chairman and CEO Jimmy Lee said the Signia product line fit ISSI’s diversification strategy and pointed to ISSI’s existing memory customers in wireless markets. He expected demand for Bluetooth to grow as more wireless applications appeared. These were the company’s stated reasons for the deal, not evidence that the forecast was fulfilled.
#1 Best Overall
- Dual-Core Performance Up to 240 MHz: Run sensor processing, wireless communication, automation logic and connected-device tasks on a 32-bit dual-core ESP32 platform designed for responsive embedded and IoT projects
- Built-in Wi-Fi and Bluetooth 4.2: Connect to 2.4 GHz Wi-Fi networks or use Bluetooth Classic and BLE for wireless sensors, smart devices, remote controls, home automation and other connected projects
- Flexible Power-Saving Modes: ESP32 power-management features support dynamic clock scaling and low-power operating modes, helping developers reduce energy use in compatible sensing, monitoring and connected-device applications, suitable for battery-powered Internet of Things (IoT) devices.
- USB-C Programming with CP2102: Connect through USB-C for power, sketch uploads and serial monitoring, while GPIO, UART, SPI and I2C interfaces support sensors, displays, motor drivers and other modules (USB-C cable not included)
- Over-the-Air Update Support: Configure OTA functionality through a compatible ESP-32 software framework to update deployed firmware over Wi-Fi without reconnecting the board by USB for every revision
The announcement also placed the Signia agreement alongside ISSI’s acquisition of Purple Ray, a network-search-processor company. Both moves extended ISSI into product areas beyond its core memory business. EDN’s announcement quoted Lee and described the broader diversification strategy.
How ISSI’s ownership changed—and why it left
The 2002 announcement described a planned 15% investment. ISSI later increased its ownership to approximately 68%, paid about $8.1 million in cash for the additional interest, including estimated transaction costs, and began consolidating Signia’s financial statements on December 1, 2004. Including its earlier $1.1 million investment, ISSI’s total purchase price was $9.2 million. These later figures come from ISSI’s fiscal 2006 Form 10-K. ISSI’s SEC filing
Rank #2
- 2.4GHz Dual Mode WiFi + Bluetooth Development Board
- Support LWIP protocol, Freertos;ESP32 is a safe, reliable, and scalable to a variety of applications
- SupportThree Modes: AP, STA, and AP+STA
- Ultra-Low power consumption, Compatible with Arduino IDE
- 1PCS 30Pin ESP32 Development Board 2.4GHz WiFi Dual Cores Microcontroller Integrated with Antenna RF Low Noise Amplifiers Filters
In fiscal 2006, ISSI decided to leave the Bluetooth business, citing a desire to focus on its core product strategy and lower its expense run-rate. The company sold its Bluetooth assets and most of its Signia shares. One filing disclosure says that in February 2006 ISSI sold approximately 77% of its Signia investment for about $4.6 million, recording a pre-tax gain of $2.2 million. Its ownership fell to approximately 16%, and it switched to cost-basis accounting effective March 2006. The filing separately reports an approximately $2.7 million gain on the overall sale of Bluetooth assets and Signia shares. Those amounts refer to different disclosures about the transactions, not interchangeable measures of a single sale. ISSI’s fiscal 2006 Form 10-K
Where the Signia SGN5210 appeared
Signia’s SGN5210 is documented in at least one consumer-product teardown: an EDN examination of a Datel Xbox wireless controller identifies it as a controller companion in the product’s 2.4 GHz wireless subsystem. The teardown says Signia was subsequently acquired by ISSI in 2005. It also notes that the wireless subsystem sat on a supplemental PCB, suggesting the base board could support wired and wireless configurations. This is evidence of one documented deployment, not proof that the SGN5210 was used broadly across Xbox controllers. EDN’s Datel controller teardown
Rank #3
- ESP32-C3 is equipped with a single-core 32-bit RISC-V processor, with a four-level pipeline architecture, with a main frequency of up to 160 MHz. ESP32-C3 has 400 KB of built-in SRAM and 384 KB of ROM storage space. ESP32-C3 is the industry-leading Wi-Fi+Bluetooth LE integrated solution
- ESP32 C3 Mini is positioned as a high-performance, low-power, cost-effective iot mini development board for low-power iot applications and wireless wearable applications.
- EPS32-C3 is a cost-effective and low-power dual-mode Wi-Fi and Bluetooth chip. The ESP32-C3 uses a RISC-V processor, a single-core processor with a main frequency of 150 MHz, which integrates Wi-Fi 4 and Bluetooth 5.0 wireless communication.
- ESP32-C3 is a system-level chip (SoC) MCU with very low power consumption and high integration, which integrates 2.4Ghz Wi-Fi and Bluetooth (Bluttooth) low-end dual-mode wireless communication. consumption.
- If external power supply is required, just connect the + level of the external power supply to the position of 5V, GND connects to the negative terminal. (Support 3.3 ~ 6V power supply). Remember that when connecting the external power supply, you cannot access USB, USB and external power supply can only choose one.
What the deal amounted to
ISSI’s move into Bluetooth was not simply a chip purchase or a manufacturing contract. It paired Signia’s product technology with ISSI’s manufacturing plans, worldwide licensing rights, and investment in the company. ISSI subsequently took majority ownership and consolidated Signia, then reversed course in fiscal 2006 to refocus on its core products and reduce expenses. The SGN5210 teardown provides a concrete example of Signia technology in a consumer device, while the available evidence does not establish the scale of its broader market adoption.
Quick Recap
Best Value
- 2.4GHz Dual Mode WiFi + Bluetooth Development Board
- Support LWIP protocol, Freertos
- SupportThree Modes: AP, STA, and AP+STA
- Ultra-Low power consumption, Compatible with Arduino IDE
- ESP32 is a safe, reliable, and scalable to a variety of applications
Rank #4
- ESP32 S3 SuperMini is positioned as a high-performance, low-power, cost-effective IoT mini development board for low-power IoT applications and wireless wearable applications.
- The ESP32-S3 is Powerful CPU: ESP32-S3, 32-bit single-core processor running at 160 MHz.
- The ESP32-S3 is WiFi: 802.11b/g/n protocol, 2.4GhHz, supports Station mode, SoftAP mode, SoftAP+Station mode, and mixed mode.
- ESP32-S3 is Ultra-low power consumption: deep sleep power consumption of about 43μA ,Rich board resources: 400KB, 384KB ROM 4Mflash built-in.,Ultra-small size: as small as a thumb (22.52x18mm) Classic form factor for wearables and small projects.
- Reliable security features: cryptographic hardware accelerator with support for AES-128/256, hash, RSA, HMAC, digital signature and secure boot, Rich interfaces: 1xI2C, 1xSPI, 2xUART, 11xGPIO(PWM), 4xADC
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
