GENERAL DESCRIPTION
This data sheet details the specific properties of the PCD3755A, PCD3755E and PCD3755F. The devices differ in their Port and Power-on-reset configurations. References to ‘PCD3755x’ apply to all three types. The devices are members of the PCD33xxA family of microcontrollers.

FEATURES
• 8-bit CPU, ROM, RAM, EEPROM and I/O; in a single 28-lead or 32-lead package
• 8 kbytes user-programmable ROM (One-Time Programmable)
• 128 bytes RAM
• 128 bytes Electrically Erasable Programmable Read-Only Memory (EEPROM)
• Over 100 instructions (based on MAB8048) all of 1 or 2 cycles
• 20 quasi-bidirectional I/O port lines
• 8-bit programmable Timer/event counter 1
• 8-bit reloadable Timer 2
• Three single-level vectored interrupts:
   – external
   – 8-bit programmable Timer/event counter 1
   – derivative; triggered by reloadable Timer 2
• Two test inputs, one of which also serves as the external interrupt input
• DTMF, modem, musical tone generator
• Reference for supply and temperature-independent tone output
• Filtering for low output distortion (CEPT compatible)
• Melody output for ringer application
• Power-on-reset
• Stop and Idle modes
• Supply voltage: 1.8 to 6 V (DTMF tone output and EEPROM erase/write from 2.5 V)
• Clock frequency: 1 to 16 MHz (3.58 MHz for DTMF suggested)
• Operating temperature: −25 to +70 °C
• Manufactured in silicon gate CMOS process.