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HT95C20P Datasheet(PDF) 7 Page - Holtek Semiconductor Inc |
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HT95C20P Datasheet(HTML) 7 Page - Holtek Semiconductor Inc |
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7 / 51 page  Pin Name I/O Description Peripherals DTMF O This pin outputs dual tone signals to dial out the phone number. The load resistor should not be less than 5k W. MUSIC O This pin outputs the single tone that is generated by the PFD generator. TIP I Input pin connected to the tip side of the twisted pair wires. It is internally biased to 1/2 VDD when the device is in power-up mode. This pin must be DC isolated from the line. RING I Input pin connected to the ring side of the twisted pair wires. It is internally biased to 1/2 VDD when the device is in power-up mode. This pin must be DC isolated from the line. RDET1 I This pin detects ring energy on the line through an attenuating network. RTIME I/O Schmitt trigger input and NMOS output pin which functions with RDET1 pin to make an RC network that performs ring detection function. LBIN I This pin detects battery low through external R1/R2 to determine threshold voltage. Absolute Maximum Ratings Supply Voltage ..........................VSS -0.3V to VSS+5.5V Storage Temperature ........................... -50°Cto125°C Input Voltage .............................. VSS -0.3 to VDD+0.3V Operating Temperature .......................... -20°Cto70°C Note: These are stress ratings only. Stresses exceeding the range specified under ²Absolute Maximum Ratings² may cause substantial damage to the device. Functional operation of this device at other conditions beyond those listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliabil- ity. Electrical Characteristics Ta=25 °C Symbol Parameter Test Conditions Min. Typ. Max. Unit VDD Conditions CPU IIDL Idle Mode Current 5V 32768Hz off, 3.58MHz off, CPU off, LCD off, WDT off, no load ¾¾ 2 mA ISLP Sleep Mode Current 5V 32768Hz on, 3.58MHz off, CPU off, LCD off, WDT off, no load ¾ 17 30 mA IGRN Green Mode Current 5V 32768Hz on, 3.58MHz off, CPU on, LCD off, WDT off, no load ¾ 28 50 mA INOR Normal Mode Current 5V 32768Hz on, 3.58MHz on, CPU on, LCD on, WDT on, DTMF generator off, FSK decoder off, no load ¾ 1.8 3 mA VIL I/O Port Input Low Voltage 5V ¾ 0 ¾ 1V VIH I/O Port Input High Voltage 5V ¾ 4 ¾ 5V IOL I/O Port Sink Current 5V ¾ 46 ¾ mA IOH I/O Port Source Current 5V ¾-2 -3 ¾ mA RPH Pull-high Resistor 5V ¾ 10 30 ¾ k W VLBIN Low Battery Detection Reference Voltage 5V ¾ 1.05 1.15 1.25 V HT95CXXX Rev. 1.50 7 May 26, 2005 |
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Similar Description - HT95C20P |
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