MIC834 Micrel Semiconductor, MIC834 Datasheet

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MIC834

Manufacturer Part Number
MIC834
Description
Comparator with Reference Advance Information
Manufacturer
Micrel Semiconductor
Datasheet

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General Description
The MIC834 is a micropower, precision voltage comparator
with an on-chip voltage reference.
The threshold is adjusted by the choice of two external
resistors. Voltage detection threshold is accurate to 1%.
Supply current is extremely low (1.5 A, typical), making it
ideal for portable applications.
The MIC834 is supplied in Micrel’s IttyBitty™ 5-lead SOT-23-
5 package.
Typical Application
IttyBitty™ is a trademark of Micrel, Inc.
April 2000
MIC834
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
Ordering Information
Part Number
MIC834BM5
R1
R2
V
IN
V
DD
5
1
VDD
INP
MIC834
Marking
1
B12
GND
OUT
Features
• Optimized for PDAs, cellular telephones, pagers,
• Input and output can be pulled up to 6V
• High 1% voltage threshold accuracy
• Built in hysteresis for noise suppression
• Extremely low 1.5 A typical supply current
• Immune to brief input transients
• 5-lead SOT-23 package
Applications
• PDAs
• Pagers
• Cordless phones
• Consumer electronics
• Embedded controllers
• Personal electronics
and other battery-powered devices
V
regardless of supply voltage
PULL-UP
4
2
R
Accuracy
PU
V
V
V
1.5V
Comparator with Reference
1%
REF
INP(max)
PULL-UP(max)
V
= 1.24V
Advance Information
OUT
V
= 6V
DD
Temperature Range
= 6V
5.5V
MIC834
–40 C to +85 C
SOT-23-5
Package
MIC834
Micrel

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MIC834 Summary of contents

Page 1

... The threshold is adjusted by the choice of two external resistors. Voltage detection threshold is accurate to 1%. Supply current is extremely low (1.5 A, typical), making it ideal for portable applications. The MIC834 is supplied in Micrel’s IttyBitty™ 5-lead SOT-23- 5 package. Typical Application IttyBitty™ trademark of Micrel, Inc. ...

Page 2

... MIC834 Pin Configuration Pin Description Pin Number Pin Name 1 INP 2 GND OUT 5 VDD MIC834 NC GND INP OUT VDD SOT-23-5 (M5) Pin Function Input: Analog input to the comparator. When V asserted to a logic-high level output. Ground No Connect Output: Active-high, open-drain output. This output is de-asserted when V < ...

Page 3

... IN (Note A) V OUT Note A. V here represents the attenuated input voltage, as applied to the INP pin; i.e Note B. Brief transients are ignored by the MIC834. See “Applications Information.” April 2000 Operating Ratings (Note 1) Supply Voltage (V Input Voltage (V Ambient Temperature Range (T Junction Temperature (T Package Thermal Resistance (θ ...

Page 4

... MIC834 Block Diagram Functional Description The MIC834 monitors the input voltage and detects when it is higher than a programmed level (plus V tion asserts the active-high output. An external pull-up resis- tor is used to produce a logic-one output. When the input voltage falls below the programmed threshold (V the output stage is on ...

Page 5

... Very brief transients may exceed the V threshold without tripping the output. As shown in Figure 2, the narrower the transient, the deeper the threshold overdrive that will be ignored by the MIC834. The graph represents the typical allowable transient duration for a given amount of threshold overdrive that will not gener- ate an output ...

Page 6

... MIC834 Package Information 1.90 (0.075) REF 0.95 (0.037) REF 3.02 (0.119) 2.80 (0.110) 0.50 (0.020) 0.35 (0.014) MIC834 1.75 (0.069) 3.00 (0.118) 1.50 (0.059) 2.60 (0.102) DIMENSIONS: MM (INCH) 1.30 (0.051) 0.90 (0.035 0.15 (0.006) 0.60 (0.024) 0.00 (0.000) 0.10 (0.004) 5-Pin SOT (M) 6 Micrel 0.20 (0.008) 0.09 (0.004) April 2000 ...

Page 7

... MIC834 April 2000 7 Micrel MIC834 ...

Page 8

... This information is believed to be accurate and reliable, however no responsibility is assumed by Micrel for its use nor for any infringement of patents or other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent right of Micrel Inc. MIC834 + 1 (408) 944-0970 http://www ...

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