![](http://datasheet.mmic.net.cn/370000/MCRF250_datasheet_16721427/MCRF250_1.png)
2003 Microchip Technology Inc.
DS21267F-page 1
MCRF250
Features
Factory programming and memory serialization
(SQTP
SM
)
Anti-collision feature to read multiple tags in the
same RF field.
One-time contactless programmable (developer
kit only)
Read-only data transmission after programming
96 or 128 bits of One-Time Programmable (OTP)
user memory (also supports 48- and 64-bit
protocols)
Typical operation frequency: 100 kHz-400 kHz
Ultra low-power operation (5
μ
A @ V
CC
= 2V)
Modulation options:
- ASK, FSK, PSK
Data Encoding options:
- NRZ Direct, Differential Biphase, Manchester
Biphase
Die, wafer, COB or SOIC package options
Factory programming options
Applications
Access control and time attendance
Security systems
Animal tagging
Product identification
Industrial tagging
Inventory control
Multiple item tagging
Package Type
Description
The MCRF250 is equipped with an anti-collision
feature that allows multiple tags in the same field to be
read simultaneously. This revolutionary feature
eliminates the issue of data corruption due to
simultaneous transmissions from multiple tags.
The MCRF250 is a passive Radio Frequency Identifi-
cation (RFID) device for low frequency applications
(100 kHz-400 kHz). The device is powered by
rectifying an incoming RF signal from a reader
interrogator. The device requires an external LC
resonant circuit to receive the incoming energizing
signal and to send data. The device develops a
sufficient DC voltage for operation when it’s external
coil voltage reaches approximately 10 V
PP
.
This device has a total of 128 bits of user programma-
ble memory and an additional 12 bits in its configuration
register. The user can manually program the 128 bits of
user memory by using a contactless programmer in a
microID developer kit such as DV103001 or
PG103001. However, in production volume the
MCRF250 is programmed at the factory (Microchip
SQTP - see Technical Bulletin TB023).The device is a
One-Time Programmable (OTP) integrated circuit and
operates as a read-only device after programming.
MCRF250
Reader
RF
Signal
Data
PDIP/SOIC
V
A
V
B
1
2
3
4
8
7
6
5
NC
I/O
Reset
NC
V
SS
V
CC
Note:
Pins 3, 4, 5 and 6 are for device test purposes only.
Pins 1 and 8 are for antenna connection.
125 kHz microID
Passive RFID Device with Anti-Collision