Datasheet

© 2002-2012 Microchip Technology Inc. DS21714G-page 13
MCP6546/6R/6U/7/8/9
3.0 PIN DESCRIPTIONS
Descriptions of the pins are listed in Table 3-1.
3.1 Analog Inputs
The comparator non-inverting and inverting inputs are
high-impedance CMOS inputs with low bias currents.
3.2 CS Digital Input
This is a CMOS, Schmitt-triggered input that places the
part into a low power mode of operation.
3.3 Digital Outputs
The comparator outputs are CMOS, open-drain digital
outputs. They are designed to make level shifting and
wired-OR easy to implement.
3.4 Power Supply (V
SS
and V
DD
)
The positive power supply pin (V
DD
) is 1.6V to 5.5V
higher than the negative power supply pin (V
SS
). For
normal operation, the other pins are at voltages
between V
SS
and V
DD
, except the output pins which
can be as high as 10V above V
SS
.
Typically, these parts are used in a single (positive)
supply configuration. In this case, V
SS
is connected to
ground and V
DD
is connected to the supply. V
DD
will
need a local bypass capacitor (typically 0.01 µF to
0.1µF) within 2mm of the V
DD
pin. These can share a
bulk capacitor with nearby analog parts (within
100 mm), but it is not required.
TABLE 3-1: PIN FUNCTION TABLE
MCP6546 MCP6546
MCP6546R MCP6546U
MCP6547 MCP6548 MCP6549
Symbol Description
PDIP,
SOIC,
MSOP
SC-70,
SOT-23
SOT-23-5
SC-70,
SOT-23-5
PDIP,
SOIC,
MSOP
PDIP,
SOIC,
MSOP
PDIP,
SOIC,
TSSOP
61 1 4161OUT,
OUTA
Digital Output (comparator A)
24 4 3222V
IN
–,
V
INA
–
Inverting Input
(comparator A)
33 3 1333V
IN
+,
V
INA
+
Non-inverting Input
(comparator A)
75 2 5874V
DD
Positive Power Supply
—— — — 5— 5V
INB
+ Non-inverting Input
(comparator B)
—— — — 6— 6V
INB
– Inverting Input (comparator B)
— — — — 7 — 7 OUTB Digital Output (comparator B)
— — — — — — 8 OUTC Digital Output (comparator C)
—— — ——— 9V
INC
– Inverting Input (comparator C)
—— — ———10V
INC
+ Non-inverting Input
(comparator C)
42 5 24411V
SS
Negative Power Supply
—— — ———12V
IND
+ Non-inverting Input
(comparator D)
—— — ———13V
IND
– Inverting Input (comparator D)
— — — — — — 14 OUTD Digital Output (comparator D)
—— — —— 8 — CSChip Select
1, 5, 8 — — — — 1, 5 — NC No Internal Connection