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ES51950 Datasheet(PDF) 4 Page - Cyrustek corporation |
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ES51950 Datasheet(HTML) 4 Page - Cyrustek corporation |
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4 / 32 page  v2.3 10/06/25 4 ES51950(5000counts) Dual Display/Cap 53 LPFC1 O Capacitor C1 connection for internal low-pass filter 54 LPFC2 O Capacitor C2 connection for internal low-pass filter 55 LPFC3 O Capacitor C3 connection for internal low-pass filter 56 LPFOUT O Capacitor C1 connection for internal low-pass filter 57 SLEEP O Sleep mode indicator, asserts low in SLEEP mode. 58 BUZIN I Pull to V- to enable the BUZOUT. 59 FREQ I Frequency counter input, offset V-/2 internally by the chip. 60 CAL_EN I Pulled to V- to enable the semi-auto calibration scheme. 61 SDA I/O Input/Output from/to EEPROM 24C02 data 62 SCL O Output to EEPROM 24C02 clock 63-86 SEG24-SEG01 O LCD segment output driver 01-24 (SEG signals) 87-90 BP4-BP1 O LCD backplane 1-4 (COM signals) 91 ALARM O LED control output driver for HV indication and NCV detection 92 BUZOUT O Outputs a 2KHz audio frequency signal for driving piezoelectric buzzer when BUZIN is low or functional key is active. 93 BKOUT O If BKLIT function is enabled, this pin will change from V- to V+ For 60 sec, once press BKLIT pin again within 60 sec, this pin will Change back to V-. 94 OSC1 I Crystal oscillator input connection 95 OSC2 O Crystal oscillator output connection 96 LCDCAP I LCD bias voltage bypass capacitor connection 97 Opt_nF I Pull to V- to change the initial range to 50nF in Cap mode. 98 C_clamp I Pull to V- to change the initial range to 5uF in Cap mode. 99 S50V I Switch control for function selection 100 SVR I Switch control for function selection 101 APOSEL I Auto power off idle time selection 102 CAL_nF I Pulled to V- to enable the small capacitor calibration scheme. 103 CESEL I OL selection feature control pin in Voltage mode. 104 TSEL I Pulled to V- to cancel the 500oC auto range mode 105 ALARM1 O LED control output driver for short-circuit detected in Cont. mode. 106 DIS_LPF I Pulled to V- to disable the low-pass-filter path in ACA mode 107 DIS_DGB I Pulled to V- to disable the buzzer beeper when HV danger appears. 108 DIS_DCA I Pulled to V- to disable DCA function in DCV mode. 109 NC - Not connected 110 BKLIT I Back light function. Pulse to V- to set BKOUT pin output. 111 SEL I Pulse to V- to enable function selection 112 HOLD I Pulse to V- to enable HOLD function. 113 RANGE I Pulse to V- to enable manual mode and manual range selection. 114 SAC I Switch for AC/DC function selection. 115-118 FC4-FC1 I Switches for function selection. 119 C- O Negative capacitor connection for on-chip DC-DC converter. 120 C+ O Positive capacitor connection for on-chip DC-DC converter. 121 LBAT9 I Multi-level low battery configuration input. Simple external resistor divider is required. 122 V- P Negative supply voltage. 123 V- P Negative supply voltage. 124 V+ O Output of on-chip DC-DC converter and positive supply voltage. 125 V+ O Output of on-chip DC-DC converter and positive supply voltage. 126 DGND P/G Digital ground. 127 AGND P/G Analog ground. 128 AGND P/G Analog ground. |
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