ST7262 - USB 8-bit MCU with 3 Endpoints, ROM/Flash | STMicroelectronics
MPN: ST7262 ✓ Active| Qty | Unit Price | Extended |
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| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
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| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
ST7262 Overview
An 8-bit MCU (microcontroller unit) is a single-chip computer integrating CPU, memory, and peripherals; the ST7 family specifically targets cost-sensitive embedded applications with deterministic interrupt handling and a C-friendly instruction set. Within the MCU taxonomy, the ST7262 sits under: MCU -> 8-bit MCU -> ST7 family -> USB-capable microcontrollers. The integrated USB transceiver and 3-endpoint controller eliminate the need for an external PHY, reducing BOM cost and PCB area for HID, CDC, and vendor-class USB peripherals.
Key features include In-Application Programming (IAP) and In-Circuit Programming (ICP) for field firmware upgrades, read/write protection for code security, a master/slave SPI supporting up to 8 Mbit/s, an SCI for asynchronous serial communication, and an operating voltage range of 4.0V to 5.5V suited to USB bus-powered designs. The 10-bit ADC offers 8 multiplexed channels with a minimum conversion time of 12 microseconds, sufficient for basic sensor and battery-monitoring tasks.
The architecture pairs a Harvard-style bus with a 4-level priority interrupt controller and a 16-bit timer structure delivering PWM, input capture, and output compare functions. The dual-voltage Flash option allows in-system programming from a 5V USB rail without an external charge pump, and read/write protection prevents software theft via the debug interface.
Typical applications include USB keyboards and mice, USB game controllers, USB barcode scanners, low-speed USB-to-serial bridges, and industrial USB human-interface devices. The small footprint and integrated USB make it a popular choice for HID-class peripherals where bill-of-materials cost is critical.
When designing with the ST7262, ensure proper USB DP/DM trace impedance (90 ohms differential) and place the internal pull-up resistor on D+ (for full-speed) or D- (for low-speed only) according to the desired USB speed. Decouple VDD with a 100 nF X7R4D ceramic capacitor placed within 3 mm of the supply pin.
This page synthesizes distributor availability, parametric equivalents, and practical design notes not found in the standalone manufacturer datasheet, helping procurement and engineering teams evaluate second-source options quickly.
Drop-in alternatives for ST7262 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ST72F62
✅ Drop-In📋 Reference alternative (not in catalog)
ST7262XXX
✅ Drop-In📋 Reference alternative (not in catalog)
ST72621J4
✅ Drop-In📋 Reference alternative (not in catalog)
ST72621J4B
✅ Drop-In📋 Reference alternative (not in catalog)
CY7C63413
✅ Drop-In📋 Reference alternative (not in catalog)
ST7262 Maximum Ratings & Electrical Characteristics
| Manufacturer | STMicroelectronics |
| Family | ST7 |
| Core | 8-bit ST7 |
| Program Memory | 16 Kbytes (ROM / FASTROM / dual-voltage Flash) |
| Data Memory (RAM) | 256 bytes |
| USB Interface | USB 1.1 low-speed device, 3 endpoints |
| ADC | 10-bit, 8 channels |
| Timers | Two 16-bit timers |
| Communication | SPI (master/slave), SCI (UART) |
| Watchdog | Yes (WDG) |
| Low-Voltage Detector | Yes (LVD) |
| Programming | IAP, ICP, read/write protection |
| Operating Voltage | 4.0 V to 5.5 V |
| Operating Temperature | -40 C to +85 C |
| Instruction Set | Enhanced ST7 (63 instructions) |
| End Points | 3 (USB) |
ST7262 standard Pin Configuration Guide
Pin configuration for ST7262 (standard package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for ST7262.
Refer to the datasheet for full pin configuration.
Typical Applications
ST7262 is suitable for 6 applications: USB Keyboard, USB Mouse / Pointer, USB Barcode Scanner, USB Game Controller, USB-to-Serial Bridge, Industrial USB HMI Keypad.
USB Keyboard
The ST7262 fits USB keyboard designs because it integrates a USB 1.1 low-speed controller with three endpoints - exactly the count required by HID keyboards (control plus interrupt-IN for key reports plus interrupt-OUT for LED status). Its 16 Kbyte program memory fits USB HID boot-report and NKRO (N-Key Rollover) report descriptors plus scan-matrix debouncing firmware; the 256 byte RAM buffers 8-byte HID reports comfortably. The internal pull-up on D- enables low-speed USB signalling without external components. Operating from 4.0-5.5 V lets the keyboard draw power directly from the USB VBUS rail without a 3.3V LDO. The two 16-bit timers drive keyboard scan-matrix multiplexing at 1 kHz while the 10-bit ADC monitors battery voltage for no-fault diagnostics.
Recommended
USB Mouse / Pointer
The ST7262 fits low-speed USB optical mice and pointing devices where it polls an optical sensor over SPI and reports movement deltas over USB HID. The integrated SPI master port connects directly to common LED/optical-sensor pairs at the 3.7 MHz max SPI rate, while the USB controller handles 125 Hz / 8 ms full-speed report cadence required by HID mouse class. Its three endpoints support control plus interrupt-IN for movement and interrupt-OUT for cursor control. The 10-bit ADC tracks battery state for cordless mice operating from 5V USB rail. The integrated watchdog prevents lockup if the optical sensor I2C connection stalls, and read/write protection secures the firmware.
Recommended
USB Barcode Scanner
The ST7262 fits USB HID barcode scanners that translate imaging-sensor or laser-line scans into keyboard-emulation HID reports over low-speed USB. Its USB 1.1 low-speed controller with three endpoints maps directly to HID-KBD descriptors, and the 10-bit ADC reads the imager's analog ambient-light sensor for auto-exposure calibration. The two 16-bit timers generate the laser-line PWM at typical 50 Hz line rate, while the SCI provides a debug UART for factory calibration. The 16 Kbyte program memory stores USB HID descriptors, scanner-state machine, and command interface code. Read/write protection prevents firmware theft from cloning operations.
Recommended
USB Game Controller
The ST7262 fits USB HID gamepads, joysticks, and arcade controllers that stream button and axis data over low-speed USB HID. Its three endpoints cover the control endpoint plus interrupt-IN for input reports plus interrupt-OUT for rumble-motor / LED control. The two 16-bit timers generate PWM for rumble motors and LED brightness while the SPI master drives LED-driver shift registers. The 16 Kbyte Flash holds HID gamepad descriptors, button-matrix debounce, and macro logic. The internal LVD ensures safe reset if the USB bus browns out during intense gameplay sessions.
Recommended
USB-to-Serial Bridge
The ST7262 fits USB-to-UART bridge dongles that present a CDC virtual COM port to a host PC while exposing a hardware SCI UART to an embedded target. Its three endpoints support CDC class (control plus bulk-IN plus bulk-OUT) without external PHY, and the SCI provides up to 1 Mbaud asynchronous serial to the target. The 16 Kbyte Flash stores USB CDC ACM descriptors plus bridge flow-control logic. The 10-bit ADC monitors bus voltage for cable-disconnect detection. Read/write protection prevents unauthorised reprogramming of bridge firmware.
Recommended
Industrial USB HMI Keypad
The ST7262 fits industrial HMI keypads that present a custom HID report to industrial PCs over low-speed USB. Its 10-bit ADC reads analogue operator-panel controls (rotary encoders, sliders) while the SCI talks to a host PLC for diagnostics. The two 16-bit timers drive PWM backlight and indicator LEDs; the SPI master scans an 8x8 mechanical matrix keypad at 1 kHz debounce rate. The watchdog timer and LVD provide fail-safe operation in factory-floor environments, and the read/write protection prevents unauthorised firmware cloning.
Recommended
Recommended Products Summary
Engineering reference data for ST7262 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ST72F62 | ST7262XXX | ST72621J4 | ST72621J4B | CY7C63413 |
|---|---|---|---|---|---|---|
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | Cypress Semiconductor |
| Core | 8-bit ST7 | 8-bit ST7 | 8-bit ST7 | 8-bit ST7 | 8-bit ST7 | 8-bit M8 |
| Program Memory | 16 Kbytes (ROM) | 16 Kbytes (Flash) | 16 Kbytes (ROM, XXX suffix) | 16 Kbytes (Flash) | 16 Kbytes (Flash) | 8 Kbytes (ROM) |
| USB Controller | USB 1.1 low-speed, 3 endpoints | USB 1.1 low-speed, 3 endpoints | USB 1.1 low-speed, 3 endpoints | USB 1.1 low-speed, 3 endpoints | USB 1.1 low-speed, 3 endpoints | USB 1.1 low-speed, 3 endpoints |
| ADC | 10-bit, 8 channels | 10-bit, 8 channels | 10-bit, 8 channels | 10-bit, 8 channels | 10-bit, 8 channels | No ADC |
| SCI / UART | Yes | Yes | Yes | Yes | Yes | No |
| Operating Voltage | 4.0 V to 5.5 V | 4.0 V to 5.5 V | 4.0 V to 5.5 V | 4.0 V to 5.5 V | 4.0 V to 5.5 V | 4.0 V to 5.5 V |
Key Differentiators
- Dual-voltage Flash programming via USB bus (vs ST72F62 (Flash) vs ST7262 (ROM))
- Three USB endpoints in a 16 Kbyte 8-bit MCU (vs CY7C63413 (Cypress, 8 Kbyte ROM))
- Integrated peripheral set reduces BOM cost (vs External-USB-PHY + discrete MCU architecture)
Design Notes
Place a 100 nF X7R ceramic decoupling capacitor within 3 mm of the VDD pin and a 10 uF tantalum or electrolytic bulk capacitor on the USB VBUS rail. Route the USB DP/DM traces as a 90 ohm differential pair with continuous reference plane on layer 2; keep total DP/DM trace length under 50 mm to meet USB 1.1 low-speed signal-integrity requirements.
The internal pull-up resistor on the ST7262 selects USB speed: connect the pull-up to D- for low-speed operation and to D+ for full-speed. Wiring the pull-up to the wrong data line is the most common cause of 'device not recognised' errors. Configure the pull-up via firmware before VBUS sensing, and ensure the 1.5 kohm pull-up is enabled only after firmware initialises the USB peripheral.
The USB DP/DM pair must be impedance-controlled to 90 ohms differential with intra-pair skew under 50 ps. Avoid stubs on the DP/DM traces, do not place components in the differential path, and keep the pair away from clock traces and switching power inductors to minimise radiated EMI and common-mode noise.
Compliance Information
Compliance data not present in the verified web data; consult STMicroelectronics product page or request a compliance certificate from your ST franchised distributor.
