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PC87413 Datasheet(PDF) 256 Page - National Semiconductor (TI) |
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PC87413 Datasheet(HTML) 256 Page - National Semiconductor (TI) |
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256 / 257 page  11.0 Device Characteristics (Continued) www.national.com 256 Revision1.2 Crowbar Figure 71. Power-On Crowbar Timing Figure 72. Power-Fall Crowbar Timing Symbol Figure Description Reference Conditions Min Max tCBTO 71, 72 Crowbar Timeout1 1. Not tested. Guaranteed by design. After ONCTL active, or VDD power fall 0.5 s2 2. Set by CRBAR_TOUT (see Section 9.3.11 on page 188). 20 s2 tCBPBO 71, 72 Crowbar generated, PWBTOUT pulse time1 After completion of Crowbar Timeout 4 s 4.25 s tPBID 71, 72 PWBTIN disable time1 After a Power-Off event 1 s 1.25 s tCBTO PWBTIN PWBTOUT ONCTL VDD (Power) tCBPBO tPBID tCBTO PWBTIN PWBTOUT ONCTL VDD (Power) tCBPBO tPBID |
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