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LC74723M датащи(PDF) 2 Page - Sanyo Semicon Device |
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LC74723M датащи(HTML) 2 Page - Sanyo Semicon Device |
2 / 12 page Pin Assignment Pin Functions No. 4841-2/12 LC74723, 74723M Pin No. Symbol Function Description 1 VSS1 Ground Ground (digital system ground) 2 XtalIN Crystal oscillator connection Used either for connecting the external crystal and capacitor that are used for internal 3 XtalOUT synchronization signal generation, or to input an external clock signal (2fsc or 4fsc). 4 CTRL1 Crystal oscillator input switching Switches the LC74723 between external clock input mode and crystal oscillator mode. Low = crystal oscillator mode, high = external clock mode 5 CSYNOUT Composite synchronization Outputs a composite synchronization signal. Outputs the crystal oscillator clock on signal output reset, i.e., when RST is low. 6 OSCIN LC oscillator Connections for the coil and capacitor that form the oscillator used to generate the 7 OSCOUT character output dot clock. Outputs the result of judging whether or not there is an external synchronization 8 SYNCJDG External synchronization signal signal. Outputs a high level when an external synchronization signal is present. judgment output Outputs the dot clock (LC oscillator) on reset, i.e., when RST is low. (The LC74723 can be set not to output this signal on reset using control data.) 9 CS Enable input Enables serial data input. Serial data input is enabled when this input is low. There is a built-in pull-up resistor on this input (hysteresis input). 10 SCLK Clock input Inputs the clock signal used for serial data input. There is a built-in pull-up resistor on this input (hysteresis input). 11 SIN Data input Serial data input. There is a built-in pull-up resistor on this input (hysteresis input). 12 VDD2 Power supply Power supply (analog system power supply) for composite video signal level adjustment. 13 CVOUT Video signal output Composite video signal output 14 NC Must be either connected to ground or left open. 15 CVIN Video signal input Composite video signal input 16 VDD1 Power supply Power supply (+5 V: digital system power supply) Video signal input for the built-in sync separator circuit (When the built-in sync 17 SYNIN Sync separator circuit input separator circuit is not used, input either the horizontal synchronization signal or the composite synchronization signal.) 18 SEPC Sync separator circuit bias voltage Built-in sync separator circuit bias voltage monitor 19 SEPOUT Composite synchronization Outputs the built-in sync separator circuit's composite synchronization signal. signal output (Outputs the SYNIN input signal when the built-in sync separator circuit is not used.) Inputs the vertical synchronization signal by integrating the output signal from the 20 SEPIN Vertical synchronization signal input SEPOUT pin. An integration circuit must be connected between the SEPOUT pin and this pin. Hold at VDD1 if this input is unused. Continued on next page. |
Аналогичный номер детали - LC74723M |
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Аналогичное описание - LC74723M |
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