SR176A4T1GE STMicroelectronics, SR176A4T1GE Datasheet - Page 6

• Manufacturer Part Number: SR176A4T1GE
• Manufacturer: STMicroelectronics

Specifications of SR176A4T1GE

• Operating Temperature (max): 85C
• Operating Temperature Classification: Commercial
• Lead Free Status / RoHS Status: Compliant

Description
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Description
The SR176 is a contactless memory, powered by an externally transmitted radio wave. It
contains 176 bits of user EEPROM, fabricated with STMicroelectronics CMOS technology.
The memory is organized as 16 blocks of 16 bits, of which 11 blocks are user accessible.
The SR176 is accessed via the 13.56 MHz carrier. Incoming data are demodulated and
decoded from the received Amplitude Shift Keying modulation signal (ASK). The modulation
index of this signal is 10%. Outgoing data are generated by load variation using Bit Phase
Shift Keying (BPSK) of a 847.5 kHz subcarrier. The Data transfer rate between the SR176
and the reader is 106 Kbit/s in both reception and emission modes.
The SR176 follows the ISO 14443-2 Type B recommendation for radio frequency power and
signal interfacing.
Figure 1.
The SR176 is principally designed for short range applications, such as object identification,
that need a low cost and non-reusable tag. The SR176 does not include any anticollision
mechanism. It provides an “addressed” selection mechanism to cope with cases where
more than one tag is present within the range of the reader.
Table 1.
The SR176 contactless EEPROM offers read and write random access in block mode. One
block is composed by 16 bits. The device has an instruction set containing seven
commands:
AC1
AC0
READ_BLOCK
WRITE_BLOCK
INITIATE
SELECT
COMPLETION
PROTECT_BLOCK
GET_PROTECTION.
Pad connections
Signal names
EEPROM
Antenna coil
Antenna coil
176 bit
USER
SR176
Demodulator
Modulator
Regulator
Supply
Power
BPSK
Load
ASK
AC0
AC1
AI09057
SR176