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ISO7021 Datasheet(PDF) 18 Page - Texas Instruments |
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ISO7021 Datasheet(HTML) 18 Page - Texas Instruments |
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18 / 30 page  Input 985 INx VCCI VCCI VCCI Output VCCO ~20 OUTx 18 ISO7021 SLLSFA0 – JULY 2019 www.ti.com Product Folder Links: ISO7021 Submit Documentation Feedback Copyright © 2019, Texas Instruments Incorporated 9.4 Device Functional Modes Table 2 shows the functional modes for the device. Table 2. Function Table VCCI VCCO INPUT (INx) OUTPUT (OUTx) COMMENTS PU PU X Undetermined The device needs an input signal transition to validate the output tracks the input state. Without a signal edge transition, the output will be in an undetermined state. PD PU X Undetermined When VCCI is unpowered, a channel output assumes the logic state based on the previous state of the output before VCCI powered down. X PD X Undetermined When VCCO is unpowered, a channel output is undetermined. When VCCO transitions from unpowered to powered-up, a channel output assumes the selected default option. 9.4.1 Device I/O Schematics Figure 5. Device I/O Schematics |
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