MAX708SCUA-T

UP监控电路 UP Supervisory Circuits

The MAX707/708 are cost-effective system supervisor circuits designed to monitor Vcc in digital systems and provide a reset signal to the host processor when necessary. No external components are required. The reset output is driven active within 20 ? sec of Vcc falling through the reset voltage threshold. Reset is maintained with 200 mS of delay time after Vcc rise above the reset threshold. The MAX707/708 have a low quiescent current of 12 ?A at Vcc = 3.3 V, an active-high RESET and active-low RESET with a push-pull output. The output is guaranteed valid down to Vcc = 1.0 V. The MAX707/708 have a Manual Reset MR input and a +1.25 V threshold detector for power-fail input PFI. These devices are available in a Micro8 and SOIC-8 package.

Features

---

 |

.

Precision Supply-Voltage Monitor

MAX707: 4.63 V Reset Threshold Voltage

MAX708: Standard Reset Threshold Voltages Typical: 4.38 V, 3.08 V, 2.93 V, 2.63 V

.

Reset Threshold Available from 1.6 V to 4.9 V with 100 mV Increments Factory Option

.

200 mS Typ Reset Timeout Delay

.

12 µA Vcc = 3.3 V Quiescent Current

.

Active_High and Active_Low Reset Output

.

Guaranteed RESET_L and RESET Output Valid to Vcc = 1.0 V

.

Voltage Monitor for Power-Fail or Low-Battery Warning

.

8 Pin SO or Micro8 Package

.

Pb-Free Packages are Available