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MCP6541/1R/1U/2/3/4
Push-Pull Output Sub-Microamp Comparators
Features:
• Low Quiescent Current: 600 nA/Comparator (typ.)
• Rail-to-Rail Input: VSS - 0.3V to VDD + 0.3V
• CMOS/TTL-Compatible Output
• Propagation Delay: 4 µs
(typical, 100 mV Overdrive)
• Wide Supply Voltage Range: 1.6V to 5.5V
• Available in Single, Dual and Quad
• Single Available in SOT-23-5, SC-70-5 * Packages
• Chip Select (CS) with MCP6543
• Low Switching Current
• Internal Hysteresis: 3.3 mV (typ.)
• Temperature Ranges:
- Industrial: -40°C to +85°C
- Extended: -40°C to +125°C
Typical Applications:
• Laptop Computers
• Mobile Phones
• Metering Systems
• Hand-held Electronics
• RC Timers
• Alarm and Monitoring Circuits
• Windowed Comparators
• Multivibrators
Related Devices:
• Open-Drain Output: MCP6546/7/8/9
Package Types
MCP6541
PDIP, SOIC, MSOP
NC 1
VIN– 2
VINA+ 3
VSS 4
-
+
8 NC
7 VDD
6 OUT
5 NC
MCP6541R
SOT-23-5
OUT 1
VDD 2
VIN+ 3
5 VSS
4 VIN
MCP6541
SC-70-5, SOT-23-5
OUT 1
VSS 2
VIN+ 3
5 VDD
4 VIN
MCP6541U
SC-70-5, SOT-23-5
VIN+ 1
VSS 2
VIN3
5 VDD
4 OUT
Description:
The Microchip Technology Inc. MCP6541/1R/1U/2/3/4
family of comparators is offered in single (MCP6541,
MCP6541R, MCP6541U), single with Chip Select (CS)
(MCP6543), dual (MCP6542) and quad (MCP6544)
configurations. The outputs are push-pull (CMOS/TTL-
compatible) and are capable of driving heavy DC or
capacitive loads.
These comparators are optimized for low-power,
single-supply operation with greater than rail-to-rail
input operation. The push-pull output of the
MCP6541/1R/1U/2/3/4 family supports rail-to-rail out-
put swing and interfaces with TTL/CMOS logic. The
internal input hysteresis eliminates output switching
due to internal input noise voltage, reducing current
draw. The output limits supply current surges and
dynamic power consumption while switching. This
product family operates with a single-supply voltage as
low as 1.6V and draws less than 1 µA/comparator of
quiescent current.
The related MCP6546/7/8/9 family of comparators from
Microchip has an open-drain output. Used with a pull-
up resistor, these devices can be used as level-shifters
for any desired voltage up to 10V and in wired-OR
logic.
* SC-70-5 E-Temp parts not available at this release of
the data sheet.
MCP6541U SOT-23-5 is E-Temp only.
MCP6542
PDIP, SOIC, MSOP
OUTA 1
VINA– 2
VINA+ 3
VSS 4
-+
+-
8 VDD
7 OUTB
6 VINB
5 VINB+
MCP6543
PDIP, SOIC, MSOP
NC 1
VIN2
VIN+ 3
VSS 4
-
+
8 CS
7 VDD
6 OUT
5 NC
MCP6544
PDIP, SOIC, TSSOP
OUTA 1
VINA– 2
VINA+ 3
VDD 4
VINB+ 5
VINB– 6
OUTB 7
14 OUTD
- + + - 13 VIND
12 VIND+
11 VSS
10 VINC+
- + + - 9 VINC-
8 OUTC
© 2002-2011 Microchip Technology Inc.
DS21696H-page 1

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MCP6541/1R/1U/2/3/4
NOTES:
DS21696H-page 2
© 2002-2011 Microchip Technology Inc.

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MCP6541/1R/1U/2/3/4
1.0 ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings †
VDD - VSS .........................................................................7.0V
Current at Analog Input Pin (VIN+, VIN-.........................±2 mA
Analog Input (VIN) †† ...................... VSS - 1.0V to VDD + 1.0V
All other 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; 400V
† Notice: Stresses above those listed under “Absolute
Maximum Ratings” 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. Exposure to maximum rating conditions for extended
periods may affect device reliability.
†† See Section 4.1.2 “Input Voltage and Current
Limits”
DC CHARACTERISTICS
Electrical Specifications: Unless otherwise indicated, VDD = +1.6V to +5.5V, VSS = GND, TA = +25°C,VIN+ = VDD/2,
VIN= VSS, and RL = 100 kΩ to VDD/2 (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 — 5.5 V
0.3 0.6 1.0 µA IOUT = 0
Input Voltage Range
VCMR
VSS0.3
VDD+0.3
V
Common Mode Rejection Ratio
CMRR
55
70
— dB VDD = 5V, VCM = -0.3V to 5.3V
Common Mode Rejection Ratio
CMRR
50
65
— dB VDD = 5V, VCM = 2.5V to 5.3V
Common Mode Rejection Ratio
CMRR
55
70
— dB VDD = 5V, VCM = -0.3V to 2.5V
Power Supply Rejection Ratio
PSRR
63
80
— dB VCM = VSS
Input Offset Voltage
VOS
-7.0
±1.5
+7.0
mV VCM = VSS (Note 1)
Drift with Temperature
ΔVOS/ΔTA
±3 — µV/°C TA = -40°C to +125°C, VCM = VSS
Input Hysteresis Voltage
VHYST 1.5 3.3 6.5 mV VCM = VSS (Note 1)
Linear Temp. Co. (Note 2)
Quadratic Temp. Co. (Note 2)
TC1
TC2
— 6.7 — µV/°C TA = -40°C to +125°C, VCM = VSS
-0.035
— µV/°C2 TA = -40°C to +125°C, VCM = VSS
Input Bias Current
IB — 1 — pA VCM = VSS
At Temperature (I-Temp parts)
IB
— 25 100 pA TA = +85°C, VCM = VSS (Note 3)
At Temperature (E-Temp parts)
IB
1200
5000
pA TA = +125°C, VCM = VSS (Note 3)
Input Offset Current
Common Mode Input Impedance
Differential Input Impedance
IOS
ZCM
ZDIFF
— ±1 — pA VCM = VSS
— 1013||4 — Ω||pF
— 1013||2 — Ω||pF
Note 1: The input offset voltage is the center (average) of the input-referred trip points. The input hysteresis is the difference
between the input-referred trip points.
2: VHYST at different temperatures is estimated using VHYST (TA) = VHYST + (TA - 25°C) TC1 + (TA - 25°C)2 TC2.
3: Input bias current at temperature is not tested for SC-70-5 package.
4: Limit the output current to Absolute Maximum Rating of 30 mA.
© 2002-2011 Microchip Technology Inc.
DS21696H-page 3

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MCP6541/1R/1U/2/3/4
DC CHARACTERISTICS (CONTINUED)
Electrical Specifications: Unless otherwise indicated, VDD = +1.6V to +5.5V, VSS = GND, TA = +25°C,VIN+ = VDD/2,
VIN= VSS, and RL = 100 kΩ to VDD/2 (Refer to Figure 1-3).
Parameters
Sym
Min Typ Max Units
Conditions
Push-Pull Output
High-Level Output Voltage
VOH
VDD0.2
— V IOUT = -2 mA, VDD = 5V
Low-Level Output Voltage
VOL
VSS+0.2
V IOUT = 2 mA, VDD = 5V
Short-Circuit Current
ISC
— -2.5, +1.5 —
mA VDD = 1.6V (Note 4)
ISC — ±30 — mA VDD = 5.5V (Note 4)
Note 1: The input offset voltage is the center (average) of the input-referred trip points. The input hysteresis is the difference
between the input-referred trip points.
2: VHYST at different temperatures is estimated using VHYST (TA) = VHYST + (TA - 25°C) TC1 + (TA - 25°C)2 TC2.
3: Input bias current at temperature is not tested for SC-70-5 package.
4: Limit the output current to Absolute Maximum Rating of 30 mA.
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, and CL = 36 pF (Refer to Figure 1-2 and Figure 1-3).
Parameters
Sym Min Typ Max Units
Conditions
Rise Time
tR — 0.85 —
Fall Time
tF — 0.85 —
Propagation Delay (High-to-Low)
tPHL
4
8
Propagation Delay (Low-to-High)
tPLH
4
8
Propagation Delay Skew
tPDS
— ±0.2 —
Maximum Toggle Frequency
fMAX
— 160 —
fMAX
— 120 —
Input Noise Voltage
Eni — 200 —
Note 1: Propagation Delay Skew is defined as: tPDS = tPLH - tPHL.
µs
µs
µs
µs
µs (Note 1)
kHz VDD = 1.6V
kHz VDD = 5.5V
µVP-P 10 Hz to 100 kHz
DS21696H-page 4
© 2002-2011 Microchip Technology Inc.

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MCP6541/1R/1U/2/3/4
MCP6543 CHIP SELECT (CS) CHARACTERISTICS
Electrical Specifications: Unless otherwise indicated, VDD = +1.6V to +5.5V, VSS = GND, TA = +25°C, VIN+ =
VDD/2, VIN– = VSS, 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
CS Input Current, Low
VIL
ICSL
VSS — 0.2 VDD V
— 5.0 — pA CS = VSS
CS High Specifications
CS Logic Threshold, High
VIH 0.8 VD
D
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 = VDD, CS = VDD
CS Dynamic Specifications
CS Low to Comparator Output tON — 2 50 ms CS = 0.2 VDD to VOUT = VDD/2,
Low Turn-on Time
VIN– = VDD
CS High to Comparator Output tOFF — 10 — µs CS = 0.8 VDD to VOUT = VDD/2,
High Z Turn-off Time
VIN– = VDD
CS Hysteresis
VCS_HYS — 0.6 —
T
V VDD = 5V
CS VIL
tON
VOUT Hi-Z
VIH
tOFF
Hi-Z
ISS -20 pA (typ.) -0.6 µA (typ.)
-20 pA (typ.)
1 pA (typ.)
ICS
1 pA (typ.)
FIGURE 1-1:
Timing Diagram for the CS
Pin on the MCP6543.
VIN
VIN+ = VDD/2
100 mV
100 mV
tPHL
tPLH
VOH
VOUT
VOL
VOL
FIGURE 1-2:
Diagram.
Propagation Delay Timing
© 2002-2011 Microchip Technology Inc.
DS21696H-page 5