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SRI4K Datasheet(PDF) 39 Page - STMicroelectronics

Part # SRI4K
Description  13.56 MHz short-range contactless memory chip with 4096-bit EEPROM and anticollision functions
PDF  46 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

SRI4K Datasheet(HTML) 39 Page - STMicroelectronics

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SRI4K
DC and ac parameters
Doc 11605 Rev 5
39/46
10
DC and ac parameters
Table 7.
Operating conditions
Symbol
Parameter
Min.
Max.
Unit
TA
Ambient operating temperature
–20
85
°C
Table 8.
DC characteristics
Symbol
Parameter
Condition
Min
Typ
Max
Unit
VCC
Regulated voltage
2.5
3.5
V
ICC
Supply current (active in read)
VCC = 3.0 V
100
µA
ICC
Supply current (active in write)
VCC = 3.0 V
250
µA
VRET
Retromodulation induced voltage
ISO 10373-6
20
mV
CTUN
Internal tuning capacitor
13.56 MHz
64
pF
Table 9.
AC characteristics(1)
Symbol
Parameter
Condition
Min
Max
Unit
fCC
External RF signal frequency
13.553
13.567
MHz
MICARRIER Carrier modulation index
MI=(A-B)/(A+B)
8
14
%
tRFR,tRFF 10% Rise and Fall times
0.8
2.5
µs
tRFSBL
Minimum pulse width for Start bit
ETU = 128/fCC
9.44
µs
tJIT
ASK modulation data jitter
Coupler to SRI4K
–2
+2
µs
tMIN CD
Minimum time from carrier
generation to first data
5ms
fS
Subcarrier frequency
fCC/16
847.5
kHz
t0
Antenna reversal delay
128/fS
151
µs
t1
Synchronization delay
128/fS
151
µs
t2
Answer to new request delay
14 ETU
132
µs
tDR
Time between request characters
Coupler to SRI4K
0
57
µs
tDA
Time between answer characters
SRI4K to coupler
0
µs
tW
Programming time for write
With no auto-erase
cycle (OTP)
3ms
With auto-erase cycle
(EEPROM)
5ms
Binary counter
decrement
7ms



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