MICREL MIC834BM5 Datasheet
MIC834 Micrel
MIC834
Comparator with Reference
Advance Information
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 (1.5µA, typical), making it
ideal for portable applications.
The MIC834 is supplied in Micrel’s IttyBitty™ 5-lead SOT-235 package.
Ordering Information
Part Number Marking Accuracy Temperature Range Package
MIC834BM5 B12 1% –40°C to +85°C SOT-23-5
Features
• Optimized for PDAs, cellular telephones, pagers,
and other battery-powered devices
• Input and output can be pulled up to 6V
regardless of supply voltage
• High ±1% voltage threshold accuracy
• Built in hysteresis for noise suppression
• Extremely low 1.5µA typical supply current
• Immune to brief input transients
• 5-lead SOT-23 package
Applications
•PDAs
• Pagers
• Cordless phones
• Consumer electronics
• Embedded controllers
• Personal electronics
Typical Application
V
V
IN
DD
MIC834
R1
R2
IttyBitty™ is a trademark of Micrel, Inc.
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
5
INP
April 2000 1 MIC834
OUTVDD
GND
V
PULL-UP
4
21
R
PU
V
V
V
1.5V ≤ V
V
OUT
= 1.24V
REF
= 6V
INP(max)
PULL-UP(max)
DD
= 6V
≤ 5.5V
MIC834 Micrel
Pin Configuration
GND
2
INP
13
VDDOUT
NC
45
SOT-23-5 (M5)
Pin Description
Pin Number Pin Name Pin Function
1 INP Input: Analog input to the comparator. When V
2 GND Ground
3 NC No Connect
4 OUT Output: Active-high, open-drain output. This output is de-asserted when
5 VDD Power Supply (Input): Independent supply input for internal circuitry.
asserted to a logic-high level output.
V
INP<VREF
V
INP>VREF+VHYST.
, indicating a low voltage input. The output is asserted when
INP>VREF+VHYST
, V
OUT
is
MIC834 2 April 2000
MIC834 Micrel
Absolute Maximum Ratings (Note 1)
Supply Voltage (V
Input Voltage (V
Output Current (I
Storage Temperature (TS) ....................... –65°C to +150°C
ESD Rating, Note 3 ......................................................2kV
) ..................................... –0.3V to +7V
DD
) ......................................................+7V
INP
).................................................20mA
OUT
Operating Ratings (Note 2)
Supply Voltage (V
Input Voltage (V
Ambient Temperature Range (T
Junction Temperature (TJ) ....................... Internally Limited
Package Thermal Resistance (θ
) .................................. +1.5V to +5.5V
DD
) ......................................... –0.3V to 6V
INP
) .............–40°C to +85°C
A
) ......................260°C/W
JA
Electrical Characteristics
1.5V ≤ VDD ≤ 5.5V; TA = +25°C, bold values indicate –40°C ≤ TA ≤ +85°C; unless noted
Symbol Parameter Condition Min Typ Max Units
I
DD
I
INP
V
REF
V
HYST
t
D
V
OUT
Note 1. Exceeding the absolute maximum rating may damage the device.
Note 2. The device is not guaranteed to function outside its operating rating.
Note 3. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF.
Note 4. V
Note 5. VDD operating range is 1.5V to 5.5V. Output is guaranteed to be held low down to VDD = 1.2V.
Supply Current output not asserted 1.5 3 µA
Input Leakage Current 0.005 10 nA
Reference Voltage 1.228 1.240 1.252 V
Hysteresis Voltage, Note 4 10 23 35 mV
Propagation Delay V
Output Voltage-Low, Note 5 OUT de-asserted, I
= V
HTH
REF
+ V
HYST
.
= 1.352V to 1.128V 12 µs
INP
V
= 1.143V to 1.367V 8 µs
INP
= 1.6mA, VDD ≥ 1.6V 0.05 0.3 V
SINK
OUT de-asserted, I
= 100µA, VDD ≥ 1.2V, 0.005 0.4 V
SINK
Functional Diagram
V
HTH
V
V
IN
REF
(Note A)
0V
V
PULL-UP
V
OUT
0V
Note A. VIN here represents the attenuated input voltage, as applied to the INP pin; i.e., V
Note B. Brief transients are ignored by the MIC834. See “Applications Information.”
Note B
Note B
t
D
INP
t
D
.
April 2000 3 MIC834
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