Datenblatt-Suchmaschine für elektronische Bauteile |
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ISO6741 Datenblatt(PDF) 21 Page - Texas Instruments |
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ISO6741 Datenblatt(HTML) 21 Page - Texas Instruments |
21 / 35 page 8.4 Device Functional Modes Table 8-2 lists the functional modes for the ISO674x devices. Table 8-2. Function Table VCCI (1) VCCO INPUT (INx) (3) OUTPUT ENABLE (ENx) OUTPUT (OUTx) COMMENTS PU PU H H or open H Normal Operation: A channel output assumes the logic state of its input. L H or open L Open H or open Default Default mode: When INx is open, the corresponding channel output goes to its default logic state. Default is High for ISO674x and Low for ISO674x with F suffix. X PU X L Z A low value of output enable causes the outputs to be high- impedance. PD PU X H or open Default Default mode: When VCCI is unpowered, a channel output assumes the logic state based on the selected default option. Default is High for ISO674x and Low for ISO674x with F suffix. When VCCI transitions from unpowered to powered-up, a channel output assumes the logic state of the input. When VCCI transitions from powered-up to unpowered, channel output assumes the selected default state. X PD X X Undetermined When VCCO is unpowered, a channel output is undetermined(2). When VCCO transitions from unpowered to powered-up, a channel output assumes the logic state of the input. (1) VCCI = Input-side VCC; VCCO = Output-side VCC; PU = Powered up (VCC ≥ 1.71 V); PD = Powered down (VCC ≤ 1.05 V); X = Irrelevant; H = High level; L = Low level ; Z = High Impedance (2) The outputs are in undetermined state when 1.7 V < VCCI, VCCO < 2.25 V and 1.05 V < VCCI, VCCO < 1.71 V (3) A strongly driven input signal can weakly power the floating VCC through an internal protection diode and cause undetermined output 8.4.1 Device I/O Schematics Input (Devices without F suffix) Input (Devices with F suffix) Input (Devices without F suffix) 985 INx VCCI VCCI VCCI Input (Devices with F suffix) 985 INx VCCI VCCI VCCI Output VCCO ~20 OUTx VCCI 1.5 M 1.5 M Enable INx VCCI VCCI VCCI VCCI 550 k 985 20 k Figure 8-3. Device I/O Schematics www.ti.com ISO6741 SLLSFJ6 – AUGUST 2020 Copyright © 2020 Texas Instruments Incorporated Submit Document Feedback 21 Product Folder Links: ISO6741 |
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