RPM871-E4A Infrared communication Module
 Figure 1 RPM871-E4A |
 Figure 2 RPM871-E4A Pin configuration |
What is RPM871-E4A？
The RPM871 is an infrared communication module. The RPM871 is designed for IrDA Ver. 1.2. The RPM871 is suitable for low power application. It is package of infrared LED as transmitter, PIN photo diode as receiver and inbuilt amplifier which are integrated into one device. The RPM871 features power down function and low current consumption at stand-by mode. It is used for wireless communication. It is a perfect for mobile devices and PDAs because of its ultra-small size.
Pin Configuration
Table 1 Pin Description
| PIN NUMBER | LABLE | DESCRIPTION |
| 1,4 | GND | Ground |
| 2 | NC | No Connection |
| 3 | VCC | Supply Terminal |
| 5 | PWDOWN | Power-down Control TerminalH: POWERDOWN
L: OPERATION |
| 6 | RXD | Receiving Data Output Terminal |
| 7 | TXD | Transmitting Data Input Terminal |
| 8 | LEDA | LED ANODE Terminal |
Features
Low power consumption
- Data transfer without any cables
- Applied to IrDA version 1.2.
- Suitable for sets driven by battery due to power down control function.
- Supply voltage range: 2.6V to 3.6V
- Constant LED load resistance can change transmission distance.
- Transmission distance: 20cm to 60cm
Applications
- Cellular phones
- PDAs
RECOMMENDED OPERATING CONDITIONS
| PARAMETER | SYMBOL | MIN. | TYP. | MAX. | UNIT |
| Power supply voltage | VCC | 2.6 | 2.8 | 3.6 | V |
| VLEDA | 2.6 | 2.8 | 5.5 | V | |
| Ambient Temp. | Ta | – | 250 | – | C |
WHERE TO USE RPM871-E4A?
RPM871 is an infrared communication module for IrDA Ver. 1.2 (Low Power). Infrared data communication is playing an important role in wireless data communication due to the popularity of laptop computers, personal digital assistants (PDAs), digital cameras, mobile telephones, pagers, and other devices. Among existing uses or likely possibilities are
- Sending a document from your notebook computer to a printer
- Exchanging business cards between handheld PCs
- Coordinating schedules and telephone books between your desktop and notebook computers
- Sending faxes from your notebook computer to a distant fax machine through a public telephone
- Digital cameras that can beam images into your computer
How RPM871-E4A work?
Figure 3 Application circuit of RPM871-E4A
Circuit diagram of RPM871-E4A is shown in Fig.3. As shown in Fig.3 small capacitor (1µF, tantalum or ceramic is recommended) should be connected between VCC and GND to prevent infection. Power-down Control Terminal is a CMOS Logic Level Input. When PWDOWN is High it will stop receiving circuit. RXD (Receiving Data Output) Terminal is CMOS Logic Level Output.
2-D VIEW OF RPM871-E4A
Figure 4 2-D View of RPM871-E4A
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RPM871-E4A DATASHEET PDF