PT4450 SAW-based OOK/ASK Transmitter IC DESCRIPTION PT4450 is a high performance OOK/ASK transmitter for the Remote Keyless Entry (RKE) systems. It consists of a SAW oscillator, power amplifier, and one-shot circuit which control the SAW oscillator and power amplifier APPLICATIONS • • • • • • Keyless entry systems Remote control systems Garage door openers Alarm systems Security systems Wireless sensors FEATURES • • • • • Highly integrated OOK/ASK transmitter High output power, 3 V/+10 dBm/18 mA Low supply voltage (2.2 V to 3.6V operation range) Low external component cost. SAW-based oscillator, frequency range from 250 MHz to 500 MHz • On-chip one-shot circuit • 50 dB RF on/off ratio • Available in 6-pin, SOT-23 package BLOCK DIAGRAM Tel: 886-66296288‧Fax: 886-29174598‧ http://www.princeton.com.tw‧2F, No.233-1, Baociao Rd., Sindian Dist., New Taipei City 23145, Taiwan PT4450 ORDER INFORMATION Valid Part Number PT4450 Package Type 6 Pins, SOT-23 Top Code PT4450 PIN CONFIGURATION PIN DESCRIPTION Pin Name OSCOUT VSS PAOUT DIN VDD OSCIN V1.1 I/O O G O I P I Description Oscillator output Ground connection Power amplifier output Data input, it will also be used to enable the chip Power supply Oscillator input 2 Pin No. 1 2 3 4 5 6 December 2012 PT4450 TESTING CIRCUIT Component S1(See note) R1(See note) R2 R3 L1 L2 C1 C2 C3 C4, C5 C6 Values 315 MHz Band 315 0 10 K 470 K 180 n 27 n 220 p 12 p 22 p 100 n 1p 434 MHz Band 434 0 10 K 470 K 180 n 27 n 220 p 4.7 p 12 p 100 n 1p Unit MHz Ω Ω Ω H H F F F F F Notes: 1. S1 is a SAW resonator. 2. R1 for output power control. V1.1 3 December 2012 PT4450 ABSOLUTE MAXIMUM RATINGS (VSS = 0 V) Parameter Supply voltage Operating temperature Storage temperature Soldering temperature Soldering time Symbol VDD Topr Tstg TSLD tSLD Rating VSS-0.3 to Vss + 5.0 -40 to +85 -65 to +150 255 10 Unit V ℃ ℃ ℃ Sec. RECOMMEND OPERATING CONDITIONS (VSS = 0 V) Parameter Supply voltage range Operating temperature Symbol VDD TA Min. 2.2 -40 Rating Typ. 3.0 25 Unit Max. 3.6 85 V ℃ ELECTRICAL CHARACTERISTICS (Unless otherwise specified, VDD = 3.0 V, VSS = 0 V, DIN = 3.0 V, Temp = 27℃, fRF = 434 MHz) Rating Parameter Symbol Condition Min. Typ. Max. DC Supply voltage VDD 2.2 3.0 3.6 DIN=High(CW mode); Operating current (See note) IDD 16 18 POUT = 10 dBm Standby current Istandby DIN = Low; TDELAY > 50 ms 1 RF Frequency range fRF 250 500 Power amplifier output power(See note) Pout +10 RF power on/off ratio PEXT 50 Phase noise PNOISE 10 KHz offset -100 Harmonics (See note) PHARM 2x/3x fRF -40 Data Input and One Shot Data rate DRATE 0.5 2 50 Start up time TON 200 One shot delay time TDELAY 50 - Unit V mA μA MHz dBm dB dBc/Hz dBc Kbps μs ms Note: Depend on power amplifier output matching. V1.1 4 December 2012 PT4450 PACKAGE INFORMATION 6 PINS, SOT-23 Symbol A A1 A2 b c D E E1 e e1 L Min. 0.00 0.90 0.30 0.08 Max 1.45 0.15 1.30 0.50 0.20 0.30 Nom. 1.15 0.13 2.90 BSC 2.80BSC 1.60BSC 0.95BSC 1.90BSC 0.45 θ 0° - 8° 0.60 Notes: 1. Refer to JEDEC MO-178 2. Unit: mm V1.1 5 December 2012 PT4450 IMPORTANT NOTICE Princeton Technology Corporation (PTC) reserves the right to make corrections, modifications, enhancements, improvements, and other changes to its products and to discontinue any product without notice at any time. PTC cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a PTC product. No circuit patent licenses are implied. Princeton Technology Corp. 2F, 233-1, Baociao Road, Sindian Dist., New Taipei City 23145, Taiwan Tel: 886-2-66296288 Fax: 886-2-29174598 http://www.princeton.com.tw V1.1 6 December 2012