Preliminary

PT4501

Sub-1 GHz Wideband FSK Transceiver

Tel: 886-2-66296288

‧Fax: 886-2-29174598‧http://www.princeton.com.tw‧2F, No. 233-1, Baociao Rd., Sindian Dist., New Taipei City 23145, Taiwan

DESCRIPTION

The PT4501 is a highly integrated wideband FSK

multi-channel half-duplex transceiver operating in

sub-1 GHz license-free ISM bands. The PT4501 is

supplied in a small 4 mm x 4 mm QFN-24 package,

offers low power consumption, and is specified to

operate in the consumer

–40°C to +85°C temperature

range.

The receive part utilizes a fully integrated

low-IF architecture.

Direct PLL modulation with the

fractional-N synthesizer is used for FSK transmission.

The device supports data rates up to 50 Kb/s in

Manchester, bi-phase and other coding formats in

transparent mode and provides a typical output power

of +10 dBm into a 50 Ω load at 433.92 MHz, and +9

dBm at 915 MHz and achieves typical sensitivities of

–

113 dBm at 433.92 MHz and

–110 dBm at 915 MHz for

FSK data.

The PT4501 is suitable for wireless applications in

unlicensed (ISM) bands and requires few external

components due to its high level of integration.

APPLICATIONS

 Remote Control / Remote Sensing

 Remote Metering

 2-Way Remote Keyless Entry

 Home Automation

 Local Telemetry Systems

 Wireless Modem

FEATURES

 Carrier frequency range: 300 MHz to 960 MHz

 Supply voltage range: 1.9 V to 3.6 V

 Low current consumption: frequency band: 14.5

mA for receive-mode and 30 mA for transmit-mode

(+9 dBm at 915 MHz and +10 dBm at 433.92 MHz)

 Programmable RF output power with 20 dB power

control range

 Programmable channel-select filter bandwidth of

200 KHz / 300 KHz / 400 KHz

 Excellent FSK sensitivity: –113 dBm (300 KHz

channel bandwidth and 0.1% BER) at 433.92 MHz

and

–110 dBm 915 MHz

 > 25 dB image-rejection

 Few external components

 50 dB RSSI range

 Power down function (< 1 μA current consumption

in power-down mode)

 4-wire SPI interface

 2 separate TX and RX FIFOs (32 bytes each)

 QFN-24 package (4 mm × 4 mm)

BENEFITS

 Low system cost due to high system integration

level

 Extended battery life because of the low power

consumption and the minimum supply voltage

down to 1.9 V

 Merged RF input/output matching to save the

external T/R switch

 Single-ended RF interface with high isolation of

PLL/VCO from PA and the power supply allows for

easy incorporation of dipole or loop antenna