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ST3917B bảng dữ liệu(PDF) 7 Page - STMicroelectronics |
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ST3917B bảng dữ liệu(HTML) 7 Page - STMicroelectronics |
7 / 16 page Symbol Parameter Test Conditions Min. Typ. Max. Unit ZDTMF DTMF Attenuation Pin Impedance 25 32 39 k Ω GRX Receive gain (see Figure 11) VINP = 4mVRMS, RE = 300 Ω,RGRX=100kΩ ILN = 15mA ILN = 60mA 29.5 23.0 31.0 25.0 32.5 27.0 dB dB AGRX Receive Gain Variation (see Figure 11) VINP = 4mVRMS, RE = 300 Ω,ILN = 15MA RGRX = 10K Ω RGRX = 300k Ω -20 -20 +10 10 dB dB dB DRX Receive Distortion (see Figure 11) ILN = 15mA, RGRX=100k Ω RE = 150 Ω,VEAR = 0.25VRMS RE = 300 Ω,VEAR = 0.45VRMS RE = 450 Ω,VEAR = 0.55VRMS 2 2 2 % % % NRX Receive Noise (see Figure 11) ILN = 15mA, RE = 300 Ω RGRX = 100k Ω,VINP =0V 200 µV ZOUT Receive Output Impedance (see Figure 11) ILN = 15mA 35 Ω VPT Pacifier Tone Level on Earphone (see Figure 11) ILN = 15mA RP = ∞ RP = 430k Ω 60 600 mVRMS mVRMS TKD FKS KRU KRD Keyboard Interface Keypad Debounce Time Keypad Scan Frequency Keypad Pullup Resistance Keypad Pulldown Resistance See Figures 4 and 5 32 250 100 500 ms Hz k Ω Ω TRIS TR TPSD TISD TDUR Tone Mode Tone Output Rise Time Tone Signalling Rate Presignal Delay Intersignal Delay Tone Output Duration See Figures 2 and 3 40 5.55 90 90 5ms 1/sec ms ms ms TPT FPT PR TB TM IDP PDP Pulse Mode Pacifier Tone Duration Pacifier Tone Frequency Pulse Rate Break Time : ST3917A ST3917B Make Time : ST3917A ST3917B Interdigital Pause Predigital Pause : ST3917A ST3917B See Figures 4 and 5 75 500 10 60 67 40 33 820 50 43 ms Hz PPS ms ms ms ms ms ms ms Option Selectable Symbol Parameter Option 1 SEL = VDD Option 2 SEL = GND Option 3 SEL = ROW Option 4 SEL = COL Unit tFLASH Timed Hook Flash (see Figures 2 and3) 100 600 300 100 ms Notes : 1. All inputs unloaded. Quiescent mode (oscillator off). 2. Pulse output sink current for VOUT = 0.5V at VDD = 3V. 3. Pacifier tone sink current for VOUT = 0.5V, source current for VOUT = 2.5V at VDD = 3V. 4. Memory retention voltage is the point where memory is guaranteed but circuit operation is not. Proper memory retention is guaranteed if either the minimum IMR is provided or the minimum VMR. The design does not have to provide both the minimum current and voltage. 5. Option 1 is with softswitch inhibition. ELECTRICAL CHARACTERISTICS (continued) (ILN = 10mA to 120mA, f = 1kHz, Tamb =25 °C, VDD = 3V ; unless otherwise specified) ST3917A - ST3917B 7/16 |
Số phần tương tự - ST3917B |
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Mô tả tương tự - ST3917B |
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