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PDF ADM6339 Data sheet ( Hoja de datos )
| Número de pieza | ADM6339 | |
| Descripción | Quad Voltage Microprocessor Supervisory Circuit | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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FEATURES
Accurate monitoring of up to four power supply voltages
6 factory-set threshold options: −5.0 V, +1.8 V, +2.5 V, +3.0 V,
+3.3 V, and +5.0 V
Adjustable input threshold options: −0.5 V (±2.0% accuracy),
+0.62 V (±0.8% accuracy), and +1.23 V
200 ms typical reset timeout
Open-drain RESET output (10 μA internal pull-up)
Reset output stage: active low, valid to IN1 = 1 V or IN2 = 1 V
Low power consumption (55 μA)
Glitch immunity
Specified from −40°C to +85°C
6-lead SOT-23 package
APPLICATIONS
Telecommunications
Microprocessor systems
Data storage equipment
Servers/workstations
GENERAL DESCRIPTION
The ADM6339 is a high accuracy supervisory circuit capable of
monitoring up to four system supply voltages.
The ADM6339 incorporates a variety of internally pretrimmed
undervoltage threshold options for monitoring −5.0 V, +1.8 V,
+2.5 V, +3.0 V, +3.3 V, and +5.0 V supply voltages. Tolerance levels
of ±5% and ±10% are available. The device is also available
with one to three adjustable threshold options. The adjustable
voltage threshold options are +1.23 V, +0.62 V, and −0.5 V. See
the Ordering Guide section for a list and description of all
available options.
If a monitored power supply voltage decreases below the mini-
mum voltage threshold (or rises above the maximum voltage
threshold for the −0.5 V and −5.0 V input options), a single
Quad Voltage Microprocessor
Supervisory Circuit
ADM6339
FUNCTIONAL BLOCK DIAGRAM
IN1
IN1
5V PULLUP
IN2
IN2
RESET
200ms
IN3 TIMEOUT
IN4
VREF ADM6339
Figure 1.
active low output asserts, triggering a system reset. The output
is open drain with a weak internal pull-up to the monitored IN2
supply of typically 10 μA. After all voltages exceed the selected
threshold level, the reset signal remains low for the reset
timeout period (200 ms typical).
The ADM6339 output remains valid as long as IN1 or IN2 exceeds
1 V. Unused monitored inputs should not be allowed to float or
to be grounded; instead, they should be connected to a supply
voltage greater than their specified threshold voltages.
The ADM6339 is available in a 6-lead SOT-23 package. The
device operates over the extended temperature range of −40°C
to +85°C.
Rev. A
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113 ©2009–2010 Analog Devices, Inc. All rights reserved.
Free Datasheet http://www.datasheet4u.com/
1 page  
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
IN1 1
6 RESET
ADM6339
IN2 2 TOP VIEW 5 GND
(Not to Scale)
IN3 3
4 IN4
Figure 2. Pin Configuration
ADM6339
Table 4. Pin Function Descriptions
Pin No. Mnemonic Description
1 IN1
Monitored Input Voltage 1.
2 IN2
Monitored Input Voltage 2. IN2 is the power supply input for the ADM6339.
3 IN3
Monitored Input Voltage 3.
4 IN4
Monitored Input Voltage 4.
5
GND
Ground.
6
RESET
Active Low RESET Output. RESET goes low when an input drops below the specified threshold (or above in the
case of the −0.5 V and −5.0 V input options). After all inputs rise above the threshold voltage, RESET remains low
for 200 ms (typical) before going high. RESET is open drain with a weak internal pull-up to IN2, typically 10 μA.
Rev. A | Page 5 of 12
Free Datasheet http://www.datasheet4u.com/
5 Page 
ADM6339
NOTES
Rev. A | Page 11 of 12
Free Datasheet http://www.datasheet4u.com/
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet ADM6339.PDF ] | |
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