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Manufacturer Part #


CY8C36xx Series 64 kB Flash 8 kB RAM 67 MHz 8-Bit PSoC®3 - QFN-68

Product Specification Section
Technical Attributes
Attributes Table
Family Name: PSoC®3
Core Processor: 8051
Program Memory Type: Flash
Flash Size (Bytes): 64kB
RAM Size: 8kB
Speed: 67MHz
No of I/O Lines: 38
InterfaceType / Connectivity: I2C/SPI/UART
Peripherals: I2C/PWM/SPI/UART/Watchdog
Number Of Timers: 4
Supply Voltage: 1.71V to 5.5V
Operating Temperature: -40°C to +85°C
Watchdog Timers: 1
Package Style:  QFN-68
Mounting Method: Surface Mount
Features & Applications
The CY8C3666LTI-203 is a 8 kB RAM, 64 kB Flash Programmable System-On-Chip. Available in surface mount QFN-68 package.

It is true system level solution providing microcontroller unit(MCU), memory, analog and digital peripheral functions in a single chip and offers a modern method of signal acquisition, signal processing, and control with high accuracy, high bandwidth, and high flexibility.


  • Single cycle 8051 CPU
    • DC to 67 MHz operation
    • Multiply and divide instructions
    • Flash program memory, up to 64 KB, 100,000 write cycles, 20 years retention, and multiple security features
    • 512-byte flash cache
    • Up to 8-KB flash error correcting code (ECC) or configuration storage
    • Up to 8 KB SRAM
    • Up to 2 KB electrically erasable programmable read-only memory (EEPROM), 1 M cycles, and 20 years retention
  • Low voltage, ultra low-power
    • Wide operating voltage range: 0.5 V to 5.5 V
    • High efficiency boost regulator from 0.5-V input through 1.8-V to 5.0-V output
    • 0.8 mA at 3 MHz, 1.2 mA at 6 MHz, and 6.6 mA at 48 MHz
  • Versatile I/O system
    • 28 to 72 I/O (62 GPIOs, eight special input/outputs (SIO), two USBIOs[2])
    • Any GPIO to any digital or analog peripheral routability
    • LCD direct drive from any GPIO, up to 46 × 16 segments[2]
    • CapSense® support from any GPIO[3]
    • 1.2-V to 5.5-V I/O interface voltages, up to four domains
    • Maskable, independent IRQ on any pin or port
    • Schmitt-trigger transistor-transistor logic (TTL) inputs
  • Digital peripherals
    • 20 to 24 programmable logic device (PLD) based universal digital blocks (UDB)
    • Full CAN 2.0b 16 Rx, 8 Tx buffers[2]
    • Full-speed (FS) USB 2.0 12 Mbps using internal oscillator[2]
    • Up to four 16-bit configurable timer, counter, and PWM blocks
  • Analog peripherals
    • 1.024 V ± 0.1% internal voltage reference across –40 °C to +85 °C
    • Configurable delta-sigma ADC with 8- to 20-bit resolution
    • Up to four 8-bit, 8-Msps IDACs or 1-Msps VDACs
    • Four comparators with 95-ns response time
    • Up to four uncommitted opamps with 25-mA drive capability
    • Up to four configurable multifunction analog blocks.
  • Programming, debug, and trace
    • JTAG (4-wire), serial wire debug (SWD) (2-wire), and single wire viewer (SWV) interfaces
    • Eight address and one data breakpoint
    • 4-KB instruction trace buffer
  • Precision, programmable clocking
    • 3- to 62-MHz internal oscillator over full temperature and voltage range
    • 4- to 25-MHz crystal oscillator for crystal PPM accuracy
    • Internal PLL clock generation up to 67 MHz
    • 32.768-kHz watch crystal oscillator
Pricing Section
Minimum Order:
Multiple Of:
On Order:
Factory Stock:Factory Stock:
Factory Lead Time:
28 Weeks
Web Price
Product Variant Information section