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ILC708N 数据表(PDF) 3 Page - Impala Linear Corporation |
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ILC708N 数据表(HTML) 3 Page - Impala Linear Corporation |
3 / 5 page mP Supervisory Circuit Impala Linear Corporation 3 (408) 574-3939 www.impalalinear.com Sept 1999 ILC705-708 1.0 Pin Number Pin Name ILC705 ILC706 ILC707 ILC708 Description MR 1 1 Manual reset input. MR forces RESET to assert when pulled below 0.8V. An internal pull-up current of 250 mA on this input forces it high when left floating. This input can also be driven from TTL or CMOS logic. Vcc 2 2 Power supply input, 5V. GND 3 3 Ground pin, 0 V reference. PFI 4 4 Power fail input. Internally connected to the power fail comparator, which is referenced to 1.25V. The power fail output (PFO) remains high if PFI is above 1.25V. PFI should be connected to GND or VOUT if the power fail comparator is not used. PFO 5 5 Power fail output. The power fail comparator is independent of all other functions on this device. WDI 6 N/A Watchdog input. The WDI input monitors microprocessor activity, an internal watchdog timer resets itself with each transition on the watchdog input. If the WDI pin is held high or low for longer than the watchdog timeout period, WDO is forced to active low. The watchdog function can be disabled by floating the WDI pin. N/C N/A 6 No Connect. RESET 7 7 RESET output. RESET is asserted if either VCC goes below the reset threshold or by a low signal on the manual reset input (MR). RESET remains asserted for one reset timeout period (200ms) after VCC exceeds the reset threshold or after the manual reset pin transitions from low to high. The watchdog timer will not assert RESET unless WDO is connected to MR. WDO 8 N/A Watchdog timer output. The watchdog timer resets itself with each transition on the watchdog input. If the WDI pin is held high or low for longer than the watchdog timeout period, WDO is forced low. WDO will also be forced low if VCC is below the reset threshold and will remain low until VCC returns to a valid level. RESET N/A 8 RESET output. RESET is the compliment of RESET and is asserted if either VCC goes below the reset threshold or by a low signal on the manual reset input (MR). RESET is suitable for microprocessors systems that use an active high reset. Pin Functions |
类似零件编号 - ILC708N |
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类似说明 - ILC708N |
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