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Motorola MC145012DWR2
- Part Number:
MC145012DWR2
- Manufacturer:
- Category:
- RoHs:
Non-RoHS Compliant - Datasheet:
- Description:
ANALOG CIRCUIT, 1 FUNC, CMOS, PD
- In stock 852
MC145012DWR2 Device Information
Overview
The MC145012DWR2 is a variant of the MC145012 smoke detector component, designed for use in advanced smoke detection systems. It features a combination of low-power analog and digital circuitry, making it suitable for battery-powered applications.
Ordering Information
- Package Type: SOIC (Small Outline Integrated Circuit)
- Suffix: DW
- Ordering Code: MC145012DW
Pin Assignment
The pin configuration for the MC145012DWR2 is as follows:
TableCopy
| Pin Number | Pin Name | Description |
|---|---|---|
| 1 | C1 | Gain-setting capacitor for high-gain mode |
| 2 | C2 | Gain-setting capacitor for normal and medium-gain modes |
| 3 | Detect | Input to the high-gain pulse amplifier, connected to the cathode of an external photodiode |
| 4 | Strobe | Output providing a regulated voltage referenced to VDD |
| 5 | VDD | Positive supply potential (6 to 12V) |
| 6 | IRED | Output providing pulsed base current for an external NPN transistor used as the infrared emitter driver |
| 7 | I/O | Interconnection pin for common signaling among multiple units; can also activate escape lights, auxiliary alarms, etc. |
| 8 | Brass | Half of the push-pull driver output, connected to the metal support electrode of a piezoelectric audio transducer |
| 9 | Silver | Half of the push-pull driver output, connected to the ceramic electrode of a piezoelectric transducer |
| 10 | Feedback | Input connected to the feedback electrode of a self-resonating piezoelectric transducer |
| 11 | LED | Active-low open-drain output driving an external visible LED |
| 12 | OSC | Oscillator pin used with external resistor and capacitor to form an oscillator |
| 13 | R1 | Pin used in conjunction with an external resistor and capacitor to determine the IRED pulse width |
| 14 | VSS | Negative supply potential |
| 15 | Low-Supply Trip | Input connected to an external voltage divider for setting the low-supply alarm threshold |
| 16 | Test | Input used to manually invoke a test mode |
Features
- Operating Voltage Range: 6 to 12V
- Operating Temperature Range: -10 to 60°C
- Average Supply Current: 8μA
- Interconnection Capability: Up to 40 units can be interconnected for common signaling
- Protection: Electrostatic Discharge (ESD) and latch-up protection on all pins
- Compliance: Designed to comply with UL217 and UL268 specifications
- Audible Signals: Supports NFPA 72, ANSI S3.41, and ISO 8201 audible emergency evacuation signals
Applications
The MC145012DWR2 is ideal for use in battery-powered smoke detector systems, providing reliable detection and signaling capabilities. It is designed to work in conjunction with an infrared photoelectric chamber and external components to form a complete smoke detection system.
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