| Operating voltage | | 2V to 5.5V max, typically 5V | | | Operating current | 2.5V | 240µA | | | 5V | 950µ | | | Standby current | 2.5V | 1µA | | | 5V | 2µA | | | Pull-high resistance | 2.5V | 180kΩ | | | 5V | 68kΩ | | | DTMF o/p | | 0.15V rms | | | DTMF o/p load | | 5kΩ | | | Tone signal distortion | 2.5V | –30dB | | | Clock input rate | serial mode | 100kHz | | | System frequency | | 3.5795MHz | | |
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