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LC72137 Datasheet(PDF) 7 Page - Sanyo Semicon Device |
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LC72137 Datasheet(HTML) 7 Page - Sanyo Semicon Device |
7 / 23 page No. 5743-7/23 LC72137, 72137M Continued from preceding page. Pin No. Symbol (MFP pin numbers Type Functions Circuit configuration are in parentheses.) 6 (5) 7 (6) 8 (7) 14 (13) 9 (8) 10 (9) 17 (16) 18 (17) 19 (18) 10 (9) BO1 BO2 BO3 BO4 IO1 IO2 PD AIN AOUT NC Output ports Input or output ports Charge pump output LPF amplifier transistor connections IF counter • Dedicated outputs • The output states are determined by the BO1 to BO5 bits in the serial data. Data: 0 = open, 1= low • A time base signal (8 Hz) can be output from the BO1 pin. (When the serial data TBC bit is set to 1.) • I/O dual-use pins • The direction (input or output) is determined by bits IOC1 and IOC2 in the serial data. Data: 0 = input port, 1 = output port • When specified for use as input ports: The state of the input pin is transmitted to the controller over the DO pin. Input state: low = 0 data value high = 1 data value • When specified for use as output ports: The output states are determined by the IO1 and IO2 bits in the serial data. Data: 0 = open, 1 = low • These pins function as input pins following a power on reset. • PLL charge pump output When the frequency generated by dividing the local oscillator signal frequency by N is higher than the reference frequency, a high level is output from the PD pin. Similarly, when that frequency is lower, a low level is output. The PD pin goes to the high-impedance state when the frequencies match. • The n-channel MOS transistor used for the PLL active low-pass filter. • Accepts an input in the frequency range 0.4 to 12 MHz. • The input signal is directly transmitted to the IF counter. • The result is output starting the MSB of the IF counter using the DO pin. • Four measurement periods are supported: 4, 8, 16, and 32 ms. IFIN 1 (–) 22 (–) NC Pin • No connection |
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