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SN888CD Datasheet(PDF) 4 Page - Texas Instruments |
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SN888CD Datasheet(HTML) 4 Page - Texas Instruments |
4 / 22 page SN888C SLLSEI4 – SEPTEMBER 2013 www.ti.com RECOMMENDED OPERATING CONDITIONS MIN NOM MAX UNIT VCC Supply voltage 4.5 5 5.5 VID Differential input voltage –12 12 VI Input voltage at any bus terminal (separate or common mode)(1) –7 12 V VIH High-level input voltage (driver, driver-enable, and receiver-enable inputs) 2 VCC VIL Low-level input voltage (driver, driver-enable, and receiver-enable inputs) 0 0.8 Driver –60 60 IO Output current mA Receiver –8 8 CL Differential load capacitance 50 pF RL Differential load resistance 60 Ω 1/tUI Signaling rate 0.3 250 kbps TJ Junction temperature –40 150 °C TA (2) Operating free-air temperature (see THERMAL INFORMATION for additional –40 85 information) (1) The algebraic convention in which the least positive (most negative) limit is designated as minimum is used in this data sheet. (2) Operation is specified for internal (junction) temperatures up to 150°C. Self-heating due to internal power dissipation should be considered for each application. Maximum junction temperature is internally limited by the thermal shut-down (TSD) circuit which disables the driver outputs when the junction temperature reaches 170°C. ELECTRICAL CHARACTERISTICS over operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT RL = 60 Ω, 375 Ω on each See Figure 2 1.5 2.5 output from –7 to +12 V Driver differential-output │VOD│ V voltage magnitude RL = 54 Ω (RS-485) 1.5 2.5 See Figure 3 RL = 100 Ω (RS-422) 2 3 Change in magnitude of RL = 54 Ω, CL = 50 pF –0.2 0 0.2 Δ│VOD driver differential-output See Figure 3 V │ voltage Steady-state common-mode 1 VCC / 2 3 VOC(SS) V output voltage Change in differential driver –0.2 0 0.2 Center of two 27- Ω load ΔVOC common-mode output See Figure 3 resistors voltage mV Peak-to-peak driver common- 850 VOC(PP) mode output voltage Differential output 8 COD pF capacitance Positive-going receiver 35 100 VIT+ differential-input voltage mV threshold Negative-going receiver –100 –35 VIT– differential-input voltage mV threshold Receiver differential-input 40 60 VHYS (1) voltage threshold hysteresis mV (VIT+ – VIT– ) Receiver high-level output IOH = –8 mA 2.4 VCC – 0.3 VOH V voltage Receiver low-level output IOL = 8 mA 0.2 0.4 VOL V voltage Driver input, driver enable, –2 2 II and receiver enable input µA current (1) Under any specific conditions, VIT+ is ensured to be at least VHYS higher than VIT–. 4 Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated Product Folder Links: SN888C |
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