MIC2785 Datasheet PDF - MICREL



Part Number MIC2785
Description Dual Supply Voltage Monitor
Page 6 Pages

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Dual Supply Voltage Monitor
with Manual Reset
General Description
The MIC2785 is a micropower voltage monitor that
provides under-voltage monitoring and manual reset
capability in a tiny 1.2mm x 1.2mm MLF® package. The
MIC2785 provides a monitored voltage input (VIN) separate
from the supply input (VDD). This insures that the reset
(/RST) output maintains a valid output state when the
voltage being monitored ramps up or down. The device
also includes a manual reset input (/MR). The /RST output
is an active low push-pull output.
The under-voltage detector compares the VIN pin voltage
against the factory-programmed threshold of 1.62V. The
reset output is asserted any time the input voltage drops
below the programmed threshold voltage. A reset can be
generated at any time by asserting the manual reset input,
/MR. This reset output will remain active until the release
of /MR. The /MR input can also be used to daisy-chain the
MIC2785 onto existing power monitoring circuitry or other
supervisors. Hysteresis is included to prevent chattering
due to noise.
No external components
Monitors input voltage for under-voltage condition
Separate inputs for supply (VDD) and monitor (VIN)
+1.5% VIN threshold voltage accuracy
Valid /RST state with VIN down to 0.0V
Valid /RST state with VDD down to 1.20V
Factory-programmed 1.62V reference
Manual reset input (/MR)
Active low RESET (/RST) output
Ultra-low input current – 5µA total (VIN and VDD)
Rejects brief input transients
-25°C to 85°C operating temperature range
RoHS lead-free compliant
Available in tiny 6-pin 1.2mm x 1.2mm Thin MLF®
The MIC2785 consumes a minimum of quiescent current,
only 5µA, 1.5µA from the main supply pin and 3.5µA from
the input pin. Offered in a tiny, space saving 6-pin MLF®
(1.2mm x 1.2mm), package. (RoHS lead-free compliant).
Mobile phones
Datasheets and support documentation can be found on GPS receivers
Micrel’s web site at: www.micrel.com.
Typical Application
Memory or Microprocessor Voltage Monitor
MicroLeadFrame and MLF are registered trademark of Amkor Technology, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
March 2009

MIC2785 datasheet pdf
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MIC2785 pdf
View PDF for Mobile

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