GENERAL DESCRIPTION
The PCD5003A is a very low power POCSAG decoder and pager controller. It supports data rates of 512, 1200 and 2400 bits/s using a single 76.8 kHz crystal. On-chip EEPROM is programmable using a minimum supply voltage of 2.0 V, allowing ‘over-the-air’ programming. The PCD5003A is fast I2C-bus compatible (maximum 400 kbits/s).

FEATURES
• Wide operating supply voltage range: 1.5 to 6.0 V
• EEPROM programming requires only 2.0 V supply
• Low operating current: 50 µA typ. (ON), 25 µA typ. (OFF)
• Temperature range: −25 to +70 °C
• “CCIR Radio paging Code No. 1” (POCSAG) compatible
• 512, 1200 and 2400 bits/s data rates using 76.8 kHz crystal
• Built-in data filter (16-times oversampling) and bit clock recovery
• Advanced ACCESS synchronization algorithm
• 2-bit random and (optional) 4-bit burst error correction
• Up to 6 user addresses Receiver Identity Codes (RICs), each with 4 functions/alert cadences
• Up to 6 user address frames, independently programmable
• Optional automatic call termination when bit error rate is high
• Standard POCSAG sync word, plus up to 4 user programmable sync words
• Received data inversion (optional)
• Call alert via beeper, vibrator or LED
• 2-level acoustic alert using single external transistor
• Alert control: automatic (POCSAG type), via cadence register or alert input pin
• Separate power control of receiver and RF-oscillator for battery economy
• Dedicated pin for easy control of superheterodyne receiver
• Synthesizer set-up and control interface (3-line serial)
• On-chip EEPROM for storage of user addresses (RICs), pager configuration and synthesizer data
• On-chip SRAM buffer for message data
• Slave I2C-bus interface to microcontroller for transfer of message data, status/control and EEPROM programming (data transfer at up to 400 kbits/s)
• Wake-up interrupt for microcontroller, programmable polarity
• Direct and I2C-bus control of operating status (ON/OFF)
• Battery-low indication (external detector)
• Out-of-range condition indication
• Real-time clock reference output
• On-chip voltage doubler
• Interfaces directly to UAA2080 and UAA2082 paging receivers.

APPLICATIONS
• Display pagers, basic alert-only pagers
• Information services
• Personal organizers
• Telepoint
• Telemetry/data transmission.