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| 型号： | TC1279-5ENBTR |
| 厂商： | Microchip Technology Inc. |
| 英文描述： | 3-Pin Reset Monitors for 5V Systems |
| 中文描述： | 3引脚复位监控器的5V系统 |
| 文件页数： | 1/12页 |
| 文件大小： | 395K |
| 代理商： | TC1279-5ENBTR |
2007 Microchip Technology Inc.
DS21384D-page 1
TC1278/TC1279
Features
Precision V
CC
Monitor for 5.0V System Supplies
250 ms Minimum RESET Output Duration
Output Valid to V
CC
= 1.2V
V
CC
Transient Immunity
Small 3-Pin SOT-23 Package
No External Components
Internal Pull-up Resistor
Available in 3 different voltage detection levels:
- 4.625V (typ.), -5 suffix
- 4.375V (typ.), -10 suffix
- 4.125V (typ.), -15 suffix
Applications
Computers
Embedded Systems
Battery Powered Equipment
Critical μP Power Supply Monitoring
Typical Operating Circuit
General Description
The TC1278/TC1279 are cost-effective system super-
visor circuits designed to monitor V
CC
in digital systems
and provide a reset signal to the host processor when
necessary. No external components are required. The
open-drain output uses an internal pull-up resistor of
approximately 6 k
Ω
.
The reset output is driven active within 5 μs of V
CC
falling through the reset voltage threshold. RESET is
maintained active for a minimum of 250 ms after V
CC
rises above the reset threshold. The TC1278 has an
active-high RESET output, while the TC1279 has an
active-low RESET output, with both devices having an
open-drain output stage. The output is valid down to
V
CC
= 1.2V. Both devices are available in a 3-Pin
SOT- 23 package.
Package Type
RESET
GND
+
–
V
CC
V
REF
Internal
Pull-up
6 k
Ω
Resistor
TC1279
TC1278
has an active-high RESET output.
V
CC
(TC1278)
RESET
(TC1279)
RESET
GND
TC1278
TC1279
1
2
3
3-Pin SOT-23
3-Pin Reset Monitors for 5V Systems
Obsolete Device
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| TC1278-10ENB | 3-Pin Reset Monitors for 5V Systems |
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| TC1278-15ENB | 3-Pin Reset Monitors for 5V Systems |
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