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MCP6546/7/8/9
Open-Drain Output Sub-Microamp Comparators
Features
• Low Quiescent Current: 600 nA/comparator (typ.)
• Rail-to-Rail Input: VSS - 0.3V to VDD + 0.3V
• Open-Drain Output: VOUT 10V
• Propagation Delay 4 µs (typ.)
• Wide Supply Voltage Range: 1.6V to 5.5V
• Single available in SOT-23-5, SC-70-5 packages
• Available in Single, Dual and Quad
• Chip Select (CS) with MCP6548
• Low Switching Current
• Internal Hysteresis: 3.3 mV (typ.)
• Industrial Temperature: -40°C to +85°C
Typical Applications
• Laptop Computers
• Mobile Phones
• Metering Systems
• Hand-held Electronics
• RC Timers
• Alarm and Monitoring Circuits
• Windowed Comparators
• Multi-vibrators
Related Devices
• CMOS/TTL-Compatible Output: MCP6541/2/3/4
Description
The Microchip Technology Inc. MCP6546/7/8/9 family
of comparators is offered in single (MCP6546), single
with chip select (MCP6548), dual (MCP6547) and quad
(MCP6549) configurations. The outputs are open-drain
and are capable of driving heavy DC or capacitive
loads.
These comparators are optimized for low power,
single-supply application with greater than rail-to-rail
input operation. The output limits supply current surges
and dynamic power consumption while switching. The
open-drain output of the MCP6546/7/8/9 family can be
used as a level-shifter for up to 10V using a pull-up
resistor. It can also be used as a wired-OR logic. The
internal Input hysteresis eliminates output switching
due to internal noise voltage, reducing current draw.
These comparators operate with a single-supply
voltage as low as 1.6V and draw less than 1 µA/
comparator of quiescent current.
The related MCP6541/2/3/4 family of comparators from
Microchip has a push-pull output that supports rail-to-
rail output swing and interfaces with CMOS/TTL logic.
Package Types
MCP6546
PDIP, SOIC, MSOP
NC 1
VIN2
VIN+ 3
VSS 4
-
+
8 NC
7 VDD
6 OUT
5 NC
MCP6546
SOT-23-5, SC-70-5
OUT 1
VSS 2
VIN+ 3
5 VDD
4 VIN
MCP6546-R
SOT-23-5
OUT 1
VDD 2
VIN+ 3
5 VSS
4 VIN
MCP6547
PDIP, SOIC, MSOP
MCP6549
PDIP, SOIC, TSSOP
OUTA 1
VINA2
VINA+ 3
VSS 4
-+
+-
8 VDD OUTA 1
7 OUTB VINA2
6 VINB– VINA+ 3
5 VINB+ VDD 4
14 OUTD
- + + - 13 VIND
12 VIND+
11 VSS
MCP6548
PDIP, SOIC, MSOP
NC 1
VIN2
VIN+ 3
VSS 4
-
+
8 CS
7 VDD
6 OUT
5 NC
VINB+ 5
VINB6
OUTB 7
10 VINC+
- + + - 9 VINC
8 OUTC
2003 Microchip Technology Inc.
DS21714C-page 1

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1.0 ELECTRICAL
CHARACTERISTICS
1.1 Absolute Maximum Ratings †
VDD - VSS ..............................................................7.0V
Open-Drain output..................................... VSS +10.5V
All inputs and outputs ........... VSS –0.3V to VDD +0.3V
Difference Input voltage ............................ |VDD - VSS|
Output Short-Circuit Current .......................continuous
Current at Input Pins .........................................±2 mA
Current at Output and Supply Pins .................. ±30 mA
Storage temperature .......................... -65°C to +150°C
Maximum Junction Temperature (TJ) ............... +150°C
ESD protection on all pins (HBM;MM)..........4 kV;200V
† Notice: Stresses above those listed under “Maximum Rat-
ings” may cause permanent damage to the device. This is a
stress rating only and functional operation of the device at
those or any other conditions above those indicated in the
operational listings of this specification is not implied. Expo-
sure to maximum rating conditions for extended periods may
affect device reliability.
PIN FUNCTION TABLE
NAME
FUNCTION
VIN+, VINA+, VINB+, VINC+, VIND+ Non-Inverting Inputs
VIN–, VINA–, VINB–, VINC–, VIND– Inverting Inputs
VDD Positive Power Supply
VSS Negative Power Supply
OUT, OUTA, OUTB, OUTC,
Outputs
OUTD
CS Chip Select
NC Not Connected
DC CHARACTERISTICS
Electrical Specifications: Unless otherwise indicated, VDD = +1.6V to +5.5V, VSS = GND, TA = 25°C, VIN+ = VDD/2, VIN– = VSS,
RPU = 2.74 kto VPU = VDD (Refer to Figure 1-3).
Parameters
Sym
Min Typ Max Units
Conditions
Power Supply
Supply Voltage
Quiescent Current per comparator
Input
VDD
IQ
1.6 —
0.3 0.6
5.5 V
1 µA IOUT = 0
Input Voltage Range
Common Mode Rejection Ratio
Common Mode Rejection Ratio
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Input Offset Voltage
Drift with Temperature
Input Hysteresis Voltage
Drift with Temperature
Drift with Temperature
Input Bias Current
Over Temperature
Input Offset Current
Common Mode Input Impedance
Differential Input Impedance
Open-Drain Output
VCMR
CMRR
VSS 0.3
55
CMRR
50
CMRR
55
PSRR
63
VOS
VOS/TA
-7.0
VHYST
VHYST/TA
VHYST/TA
IB
IB
IOS
ZCM
ZDIFF
1.5
70
65
70
80
±1.5
±3
3.3
10
5
1
±1
1013||4
1013||2
VDD + 0.3
+7.0
6.5
100
V
dB VDD = 5V, VCM = -0.3V to 5.3V
dB VDD = 5V, VCM = 2.5V to 5.3V
dB VDD = 5V, VCM = -0.3V to 2.5V
dB VCM = VSS
mV VCM = VSS (Note 1)
µV/°C TA = -40°C to +85°C, VCM = VSS
mV VCM = VSS (Note 1)
µV/°C TA = -40°C to +25°C, VCM = VSS
µV/°C TA = +25°C to +85°C, VCM = VSS
pA VCM = VSS
pA TA = -40°C to +85°C, VCM = VSS (Note 3)
pA VCM = VSS
||pF
||pF
Output Pull-Up Voltage
VPU
VDD
10
V (Note 2)
High-Level Output Current
IOH
-100
— nA VDD = 1.6V to 5.5V, VPU = 10V (Note 2)
Low-Level Output Voltage
VOL VSS — VSS + 0.2 V IOUT = 2 mA, VPU = VDD = 5V
Short-Circuit Current
ISC
— ±50
— mA VPU = VDD = 5.0V (Note 2)
Output Pin Capacitance
COUT
—8
— pF
Note 1: The input offset voltage is the center of the input-referred trip points. The input hysteresis is the difference between the
input-referred trip points.
2: Do not short the output above VSS + 10V. Limit the output current to Absolute Maximum Rating of 30 mA. The
comparator does not function properly when VPU < VDD.
3: Input bias current overtemperature is not tested for the SC-70-5 package.
DS21714C-page 2
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AC CHARACTERISTICS
Electrical Specifications: Unless otherwise indicated, VDD = +1.6V to +5.5V, VSS = GND, TA = 25°C, VIN+ = VDD/2,
Step = 200 mV, Overdrive = 100 mV, RPU = 2.74 kto VPU = VDD, and CL = 36 pF (Refer to Figure 1-2 and Figure 1-3).
Parameters
Sym
Min Typ Max Units
Conditions
Fall Time
tF — 0.7 — µs (Note 1)
Propagation Delay (High-to-Low)
tPHL
— 4.0 8.0 µs
Propagation Delay (Low-to-High)
tPLH
3.0 8.0 µs (Note 1)
Propagation Delay Skew
tPDS
— -1.0 —
µs (Notes 1 and 2)
Maximum Toggle Frequency
fMAX
— 225 — kHz VDD = 1.6V
fMAX
— 165 — kHz VDD = 5.5V
Input Noise Voltage
EN — 200 — µVP-P 10 Hz to 100 kHz
Note 1: tR and tPLH depend on the load (RL and CL); these specifications are valid for the indicated load only.
2: Propagation Delay Skew is defined as: tPDS = tPLH - tPHL.
SPECIFICATIONS FOR MCP6548 CHIP SELECT
Electrical Specifications: Unless otherwise indicated, VDD = +1.6V to +5.5V, VSS = GND, TA = 25°C, VIN+ = VDD/2, VIN– = VSS,
RPU = 2.74 kto VPU = VDD, and CL = 36 pF (Refer to Figures 1-1 and 1-3).
Parameters
Sym
Min Typ Max Units
Conditions
CS Low Specifications
CS Logic Threshold, Low
VIL VSS — 0.2VDD V
CS Input Current, Low
ICSL
5
— pA CS = VSS
CS High Specifications
CS Logic Threshold, High
VIH 0.8VDD
VDD
V
CS Input Current, High
ICSH
1
— pA CS = VDD
CS Input High, VDD Current
IDD — 18 — pA CS = VDD
CS Input High, GND Current
ISS — -20 — pA CS = VDD
Comparator Output Leakage
IO(LEAK)
1
— pA VOUT = VSS+10V
CS Dynamic Specifications
CS Low to Comparator Output Low
tON
2
50 ms CS = 0.2VDD to VOUT = VDD/2,
Turn-on Time
VIN– = VDD
CS High to Comparator Output
High Z Turn-off Time
tOFF — 10 — µs CS = 0.8VDD to VOUT = VDD/2,
VIN– = VDD
CS Hysteresis
VCS_HYST
0.6
V VDD = 5V
CS
VOUT
VIL
tON
Hi-Z
VIH
tOFF
Hi-Z
ISS -20 pA, typ.
1 pA, typ.
ICS
-0.6 µA, typ.
-20 pA, typ.
1 pA, typ.
FIGURE 1-1:
Timing Diagram for the CS
pin on the MCP6548.
VIN
VIN+ = VDD/2
tPLH
VOUT
VOL
100 mV
100 mV
tPHL
VOH
VOL
FIGURE 1-2:
Diagram.
Propagation Delay Timing
2003 Microchip Technology Inc.
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TEMPERATURE SPECIFICATIONS
Electrical Specifications: Unless otherwise indicated, VDD = +1.6V to +5.5V and VSS = GND.
Parameters
Sym Min Typ Max Units
Conditions
Temperature Ranges
Specified Temperature Range
Operating Temperature Range
Storage Temperature Range
Thermal Package Resistances
TA
TA
TA
-40 — +85 °C
-40 — +125 °C Note
-65 — +150 °C
Thermal Resistance, 5L-SC-70 θJA — 331 — °C/W
Thermal Resistance, 5L-SOT-23
θJA
— 256 — °C/W
Thermal Resistance, 8L-PDIP
θJA — 85 — °C/W
Thermal Resistance, 8L-SOIC
θJA — 163 — °C/W
Thermal Resistance, 8L-MSOP θJA — 206 — °C/W
Thermal Resistance, 14L-PDIP θJA — 70 — °C/W
Thermal Resistance, 14L-SOIC θJA — 120 — °C/W
Thermal Resistance, 14L-TSSOP θJA
— 100 — °C/W
Note: The MCP6546/7/8/9 operates over this extended temperature range, but with reduced performance. In any
case, the Junction Temperature (TJ) must not exceed the absolute maximum specification of +150°C.
1.2 Test Circuit Configuration
This test circuit configuration is used to determine the
AC and DC specifications.
200 k
200 k
VIN = VSS
VDD
VPU = VDD
MCP654X
100 k
VSS = 0V
RPU
2.74 k
VOUT
36 pF
FIGURE 1-3:
AC and DC Test circuit for
the open- drain output comparators.
DS21714C-page 4
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2.0 TYPICAL PERFORMANCE CURVES
Note:
The graphs and tables provided following this note are a statistical summary based on a limited number of
samples and are provided for informational purposes only. The performance characteristics listed herein
are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified
operating range (e.g., outside specified power supply range) and therefore outside the warranted range.
Note: Unless otherwise indicated, VDD = +1.6V to +5.0V, VSS = GND, TA = +25°C, VIN+ = VDD/2, VIN– = GND,
RPU = 2.74 kto VPU = VDD, and CL = 36 pF.
14%
12%
10%
1200 Samples
VCM = VSS
8%
6%
4%
2%
0%
-7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7
Input Offset Voltage (mV)
FIGURE 2-1:
Input Offset Voltage
Histogram at VCM = VSS.
18%
16%
14%
1200 Samples
VCM = VSS
12%
10%
8%
6%
4%
2%
0%
1.6 2.0 2.4 2.8 3.2 3.6 4.0 4.4 4.8 5.2 5.6 6.0
Input Hysteresis Voltage (mV)
FIGURE 2-4:
Input Hysteresis Voltage
Histogram at VCM = VSS.
16%
14%
12%
1200 Samples
VCM = VSS
10%
8%
6%
4%
2%
0%
-14 -12 -10 -8 -6 -4 -2 0 2 4 6 8 10 12 14
Input Offset Voltage Drift (µV/°C)
FIGURE 2-2:
Input Offset Voltage Drift
Histogram at VCM = VSS.
26%
24%
22%
20%
18%
16%
14%
12%
10%
8%
6%
4%
2%
0%
TA = 25°C to 85°C
1200 Samples
VCM = VSS
TA = -40°C to 25°C
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Input Hysteresis Voltage Drift (µV/°C)
FIGURE 2-5:
Drift Histogram.
Input Hysteresis Voltage
500
400 VCM = VSS
300 VDD = 1.6V
200
100
0
-100
-200
-300
VDD = 5.5V
-400
-500
-40 -20 0 20 40 60
Ambient Temperature (°C)
80
FIGURE 2-3:
Input Offset Voltage vs.
Ambient Temperature at VCM = VSS.
6.0
5.5 VCM = VSS
5.0
4.5
4.0 VDD = 1.6V
3.5
3.0 VDD = 5.5V
2.5
2.0
1.5
-40 -20 0 20 40 60
Ambient Temperature (°C)
80
FIGURE 2-6:
Input Hysteresis Voltage vs.
Ambient Temperature at VCM = VSS.
2003 Microchip Technology Inc.
DS21714C-page 5