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TLC2934 Datasheet(PDF) 2 Page - Texas Instruments |
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TLC2934 Datasheet(HTML) 2 Page - Texas Instruments |
2 / 10 page TLC2934 3.3 V 130 MHZ VCO, PHASE FREQUENCY DETECTOR SLAS306 – NOVEMBER 2000 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 Terminal Functions TERMINAL I/O DESCRIPTION NAME NO. I/O DESCRIPTION FIN-A, FIN-B 4 5 I Frequency signal inputs for PFD. The reference frequency signal (fREF-IN) and the VCO output signal through the external counter device are applied to these terminals. When the LPF design is the lag-lead filter (passive filter and noninverting), f(REF-IN) is input to FIN-A, and the VCO output signal is to FIN-B. LOGIC GND 7 GND terminal for the internal logic circuit LOGIC VDD 1 Power supply terminal for the internal logic circuit. This power supply terminal separates from VCO VDD to reduce cross-coupling between supplies. PFD INHIBIT 9 I PFD INHIBIT (power-down) control signal input terminal PFD OUT 6 O PFD output terminal. When PFD INHIBIT is high, PFD OUT is in the high-impedance state. RBIAS 13 I Bias resistor (RBIAS) terminal. Connect a resistor between VCO GND and this terminal to supply bias to internal VCO circuit. TLC2934 bias resistor connection is different from TLC2932 and TLC2933, where bias resistor RBIAS is connected to VCO VDD. SELECT 2 I 1/2 divider select terminal. L=through output, H=1/2 output. TEST 8 Test terminal. Use for production test. Tie to GND when in normal use. VCO GND 11 GND terminal for internal VCO VCO OUT 3 O VCO output terminal. When VCO INHIBIT = high, VCO OUT is low. VCO INHIBIT 10 I VCO INHIBIT (power-down) control signal input terminal VCO IN 12 I VCO control voltage input terminal. Normally, The external LPF is connected to this terminal. VCO VDD 14 Power supply terminal for the internal VCO circuit. This power supply terminal should be separate from LOGIC VDD to reduce cross-coupling between supplies. absolute maximum ratings over operating free-air temperature (unless otherwise noted)† Supply voltage (each supply), VDD (see Note 1) –0.5 V to 4 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Input voltage range (each input), VI (see Note 1) –0.5 V to VDD + 0.5 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Input current (each input), II ±20 mA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Output current (each output), IO ±20 mA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Continuous total power dissipation at (or below) TA = 25_C (see Note 2), PD 700 mW . . . . . . . . . . . . . . . . . . . Operating free-air temperature range. TA –20 °C to 75°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Storage temperature range, Tstg –65 °C to 150°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds 260 °C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . † Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. NOTES: 1. All voltage values are with respect to network ground terminal. 2. For operation above 25 °C free–air temperature, derate linearly at the rate of 5.6 mW/°C |
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