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SRI4K 数据表(PDF) 38 Page - STMicroelectronics

部件名 SRI4K
功能描述  13.56 MHz short-range contactless memory chip with 4096-bit EEPROM and anticollision functions
PDF  45 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

SRI4K 数据表(HTML) 38 Page - STMicroelectronics

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DC and ac parameters
SRI4K
38/45
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)
1.
All timing measurements were performed on a reference antenna with the following characteristics:
External size: 75 mm x 48 mm
Number of turns: 3
Width of conductor: 1 mm
Space between 2 conductors: 0.4 mm
Value of the coil: 1.4 µH
Tuning Frequency: 14.4 MHz.
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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