MC14600P Freescale Semiconductor, MC14600P Datasheet - Page 4

• Manufacturer Part Number: MC14600P
• Description: IC ALARM GENERAL MONO 16-DIP
• Manufacturer: Freescale Semiconductor

Specifications of MC14600P

• Applications: *
• Mounting Type: Through Hole
• Package / Case: 16-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Timing
period of 1.65 seconds during no-alarm conditions. Each
1.65 seconds, internal power is applied to the entire IC and a
check is made for an alarm input level except during LED
pulse, Low Battery Alarm Chirp, or Horn Modulation (in
alarm). Every 24 clock cycles a check is made for low battery
by comparing V
small currents are used in the oscillator, the oscillator
capacitor should be of a low leakage type.
Detect Circuitry
becomes 41.67 ms and the piezoelectric horn oscillator
circuit is enabled. The horn output is modulated 167 ms on,
83 ms off. During the off time, alarm detect input (Pin 15) is
again checked and will inhibit further horn output if no alarm
condition is sensed. During alarm conditions the low battery
chirp is inhibited, and the LED pulses at a 1.0 Hz rate.
input (Pin 16). The voltage at this pin will be within 100 mV of
the input signal. Pin 16 will allow monitoring of the input signal
at pin 15 through a buffer. The active guard op amp is not
.
4
14600
The internal oscillator of the MC14600 operates with a
If an alarm condition is detected, the oscillator period
An active guard is provided on a pin adjacent to the detect
DD
0.1 μF
to an internal zener voltage. Since very
VDD
*Note: Component values may change depending on the type of piezoelectric horn used.
330 Ω
R
BIAS
R
P
VDD
Figure 3. Typical Application Components
1
2
3
4
5
6
7
8
MC14600
DEVICE OPERATION
16
15
14
13
12
11
10
9
1.5 MΩ*
surface leakage currents. Pin 15 (the Detect input) has
internal diode protection against static damage.
power strobed and thus gives constant protection from
Low Battery Threshold
divider connected between VDD and VSS. This voltage can
be altered by external resistors connected from pin 3 to either
VDD or VSS. A resistor to VDD will decrease the threshold
while a resistor to GND will increase it.
Alarm Threshold (Sensitivity)
Pin 13. A voltage divider can be used to set the alarm trip
point. Pin 13 is connected internally to the negative input of
the detect comparator.
LED Pulse
during the LED pulse. The battery is loaded via a 10 mA
pulse for 10 ms. If the LED is not used, it should be replaced
with an equivalent resistor so that the battery loading remains
at 10 mA.
The low battery voltage level is set internally by a voltage
The alarm condition voltage level is set externally through
The 9-volt battery level is checked every 40 seconds
R1
0.001 μF
VDD
R2
DETECT
INPUT
220 kΩ*
Analog Integrated Circuit Device Data
Freescale Semiconductor
COSC