28440 Parallax Inc, 28440 Datasheet - Page 2

• Manufacturer Part Number: 28440
• Description: RFID Modules & Development Tools RFID Read/Write Serial Module
• Manufacturer: Parallax Inc

Specifications of 28440

• Operating Current: 10 mA
• Operating Voltage: 5 V
• Product: RFID Readers
• Wireless Frequency: 125 KHz
• Dimensions: 3.25 in x 2.45 in
• Operating Temperature Range: - 40 C to + 85 C
• For Use With/related Products: EM4x50
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Connections
The RFID Read/Write Module easily interfaces to any host microcontroller using only four connections
(VCC, SIN, SOUT, GND).
Note: Type: I = Input, O = Output, P = Power, G = Ground
Use the following example circuit for connecting the Parallax RFID Read/Write Module:
Copyright © Parallax Inc.
Pin
1
2
3
4
Pin Name
GROUND
SOUT
VCC
SIN
Type
O
G
P
I
RFID Read/Write Module, Serial (#28440)
Function
System power. +5V DC input.
Serial input from host. TTL-level interface, 9600 bps, 8 data
bits, no parity, 1 stop bit.
Serial output to host. TTL-level interface, 9600 bps, 8 data bits,
no parity, 1 stop bit.
System ground. Connect to power supply’s ground (GND)
terminal.
v1.0 6/29/2010 Page 2 of 10