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AM79C940 Datasheet(PDF) 90 Page - Advanced Micro Devices |
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AM79C940 Datasheet(HTML) 90 Page - Advanced Micro Devices |
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90 / 122 page  AMD 90 Am79C940 DC CHARACTERISTICS over COMMERCIAL operating ranges unless otherwise specified (continued) Parameter Symbol Parameter Description Test Conditions Min Max Unit VAOCM DO ± Common Mode RL = 78 Ω 2.5 AVDD V Output Voltage VODIDO ± Differential Output RL = 78 Ω (Note 6) –25 25 mV Voltage Imbalance VATH Receive Data Differential RL = 78 Ω (Note 6) –35 35 mV Input Threshold VASQ DI ± and CI± Differential –160 –275 mV Input Threshold Squelch RL = 78 Ω (Note 6) VIRDVD DI ± and CI± Differential 1.5 V Mode Input Voltage Range VICM DI ± and CI± Input Bias IIN = 0 mA AVDD–3.0 AVDD–0.8 V Voltage VOPD DO ± Undershoot Voltage (Note 5) –100 mV at Zero Differential on Transmit Return to Zero (ETD) IDD Power Supply Current SCLK = 25 MHz 75 mA XTAL1 = 20 MHz IDDSLEEP Power Supply Current SLEEP Asserted, AWAKE = 0 100 µA RWAKE = 0 (Note 7) IDDSLEEP Power Supply Current SLEEP Asserted, AWAKE = 1 10 mA RWAKE = 0 (Note 7) IDDSLEEP Power Supply Current SLEEP Asserted, AWAKE = 0 20 mA RWAKE = 1 (Note 7) Twisted Pair Interface IIRXD Input Current at RXD ± AVSS < VIN < AVDD –500 500 µA RRXD RXD ± Differential Input (Note 8) 10 K Ω Resistance VTIVB RXD+, RXD– Open Circuit IIN = 0 mA AVDD – 3.0 AVDD – 1.5 V Input Voltage (Bias) VTIDV Differential Mode Input AVDD = +5 V –3.1 +3.1 V Voltage Range (RXD ±) VTSQ+ RXD Positive Squelch Sinusoid Threshold (Peak) 5 MHz ≤ f ≤10 MHz 300 520 mV VTSQ- RXD Negative Squelch Sinusoid Threshold (Peak) 5 MHz ≤ f ≤10 MHz –520 –300 mV VTHS+ RXD Post-Squelch Sinusoid Positive Threshold (Peak) 5 MHz ≤ f ≤10 MHz 150 293 mV VTHS- RXD Post-Squelch Sinusoid Negative Threshold (Peak) 5 MHz ≤ f ≤10 MHz –293 –150 mV VLTSQ+ RXD Positive Squelch LRT = LOW 180 312 mV Threshold (Peak) VLTSQ- RXD Negative Squelch LRT = LOW –312 –180 mV Threshold (Peak) VLTHS+ RXD Post-Squelch Positive LRT = LOW 90 156 mV Threshold (Peak) VLTHS- RXD Post-Squelch LRT = LOW –156 –90 mV Negative Threshold (Peak) |
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