MAXQ3210-EJX MAXIM [Maxim Integrated Products], MAXQ3210-EJX Datasheet - Page 21

• Manufacturer Part Number: MAXQ3210-EJX
• Description: Microcontroller with Internal Voltage Regulator, Piezoelectric Horn Driver, and Comparator
• Manufacturer: MAXIM [Maxim Integrated Products]

The piezoelectric horn driver provides circuitry to drive
a 3-pin piezoelectric horn/annunciator. These horns
contain a ceramic element that bends or expands when
a voltage is applied, generating a single tone capable
of reaching 100dB. They can be used in a wide variety
of applications requiring audible alerts such as theft,
intrusion proximity or fire alarms, chemical sensors,
door sensors, and safety monitors.
Figure 4. MAXQ3210 Analog Comparator
Microcontroller with Internal Voltage Regulator,
CMON
STOP
EXRF
REF0
CMPI (P0.5)
V
REF
Piezoelectric Horn Driver
(P0.4)
Piezoelectric Horn Driver, and Comparator
0
1
0
1
CMON
0
1
INTERRUPT
REQUEST
CMON
STOP
GAIN = 1
____________________________________________________________________
V
CMF
OUT
≈ (V+ > V-)
GENERATOR
REFERENCE
+2.5V
Q
CPOL
The three-terminal piezoelectric horn is connected to
the horn silver (HORNS), horn brass (HORNB), and
feedback (FEED) pins, plus a dedicated ground for the
horn driver (GND
drive any industry-standard piezoelectric horn, allowing
the designer maximum flexibility and lowest overall sys-
tem cost. A single bit (HRNE) enables or disables the
horn output, and software can toggle the bit to produce
sounds of varying durations and patterns.
ENABLE
SET
SYSTEM
CLOCK
V
IN
D
>
REFERENCE
BANDGAP
HORN
+2.5V
Q
CMM
ECMF
). The MAXQ3210 is designed to
0
1
ECMO
CMPO (P0.3)
REF0
EXRF
CMON
STOP
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