CRX14_10 Datasheet, PDF (40/47 Pages) STMicroelectronics – ISO14443 type-B contactless coupler chip with anti-collision, CRC management and anti-clone function

DC and AC parameters
CRX14
Table 13. RF_OUT AC characteristics (continued)
Symbol
Parameter⁽¹⁾
Condition
Min.
Max. Unit
t_WDG
t_WDG
t_WDG
t_WDG
Answer delay watchdog (b₅=0, b₆=0)
Answer delay watchdog (b₅=0, b₆=1)
Answer delay watchdog (b₅=1, b₆=0)
Answer delay watchdog (b₅=1, b₆=1)
Request EOF
rising edge to
first Answer
start bit
500
µs
5
ms
10
ms
309
ms
t_DR
Time Between Request characters
CRX14 to PICC
9.44
µs
P_A
RF_OUT output power
90
mW
t_POR
CRX14 Power-On delay
20
ms
1. Data specified in the table above are estimated or target values. All values can be updated during product qualification.
Table 14. RF_IN AC characteristics
Symbol
Parameter⁽¹⁾
Condition
Min. Max. Unit
t_RFSBL PICC Pulse Width
1 ETU = 128/f_CC
9.44
µs
f_S
PICC Sub-carrier Frequency
f_CC/16
847.5
KHz
t_DA
Time Between Answer characters
PICC to CRX14
1, 2, 3
ETU
V_DYN RF_IN Dynamic Voltage Level
V_DYN Max for V_OFFSET = V_CC/2
0.5 V_CC/2 V
V_OFFSET RF_IN Offset Voltage Level
2
3
V
V_RET RF_IN Retro-modulation Level
120
mV
1. Data specified in the table above are estimated or target values. All values can be updated during product qualification.
40/47
Doc ID 8880 Rev 4