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AM79C940 Datasheet(PDF) 91 Page - Advanced Micro Devices |
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AM79C940 Datasheet(HTML) 91 Page - Advanced Micro Devices |
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91 / 144 page  91 DC CHARACTERISTICS (Continued) Parameter Symbol Parameter Description Test Conditions Min Max Unit IAODOFF Transmit Differential Output Idle Current RL = 78 Ω –1+1 mA VAOCM DO ± Common Mode Output Voltage RL = 78 Ω 2.5 AVDD V VODI DO ± Differential Output Voltage Imbalance RL = 78 Ω (Note 6) –25 25 mV VATH Receive Data Differential Input Threshold RL = 78 Ω (Note 6) –35 35 mV VASQ DI ± and CI± Differential Input Threshold Squelch RL = 78 Ω (Note 6) –160 –275 mV VIRDVD DI ± and CI± Differential Mode Input Voltage Range 1.5 V VICM DI ± and CI± Input Bias Voltage IIN= 0 mA AVDD –3.0 AVDD –0.8 V VOPD DI ± Undershoot Voltage at Zero Differential on Transmit Return to Zero (ETD) (Note 5) –100 mV IDD Power Supply Current SCLK = 25 MHz XTAL1 = 20 MHz 75 mA IDDSLEEP Power Supply Current SLEEP Asserted, AWAKE = 0 RWAKE = 1 (Note 7) 100 µA IDDSLEEP Power Supply Current SLEEP Asserted, AWAKE = 1 RWAKE = 0 (Note 7) 10 mA IDDSLEEP Power Supply Current SLEEP Asserted, AWAKE = 0 RWAKE = 1 (Note 7) 20 mA Twisted Pair Interface IIRXD Input Current at RXD ± AVSS< VIN < AVDD –500 500 µA RRXD RXD ± Differential Input Resistance (Note 8) 10 K Ω VTIVB RXD ±, RXD– Open Circuit Input Voltage (Bias) IIN= 0 mA AVDD –3.0 AVDD –1.5 V VTIDV Differential Mode Input Voltage Range (RXD ±) AVDD= +5V –3.1 +3.1 V VTSQ+ RXD Positive Squelch Threshold (Peak) Sinusoid 5 MHz ≤ f ≤10 MHz 300 520 mV VTSQ– RXD Negative Squelch Threshold (Peak) Sinusoid 5 MHz ≤ f ≤10 MHz –520 –300 mV VTHS+ RXD Post-Squelch Positive Threshold (Peak) Sinusoid 5 MHz ≤ f ≤10 MHz 150 293 mV VTHS– RXD Post-Squelch Negative Threshold) (Peak) Sinusoid 5 MHz ≤ f ≤10 MHz –293 –150 mV VLTSQ+ RXD Positive Squelch Threshold (Peak) LRT = LOW 180 312 mV VLTSQ– RXD Negative Squelch Threshold (Peak) LRT = LOW –312 –180 mV VLTHS+ RXD Post-Squelch Positive Threshold (Peak) LRT = LOW 90 156 mV |
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