PCF7936AS View Datasheet(PDF) - NXP Semiconductors.
Part Name
Description
MFG CO.
'PCF7936AS' PDF : 33 Pages View PDF
NXP Semiconductors
Security Transponder (HITAG2)
Product Specification
PCF7936AS
10.2 Timing Characteristics
Tamb = -40 to +85°C, fSYS = 125kHz, TO = 1/fSYS. Unless otherwise specified
SYMBOL
PARAMETER
CONDITION
Command Handling
tWAIT,Tr
Transponder response delay
tWAIT,Bs
Basestation response delay
tPROG
EEPROM erase/write time
tIDLE
Idle time
Data Transmission
TBIT
Bit duration
TWRP
Write pulse width
TLOG_0
Write pulse repetition time, logic 0
TLOG_1
Write pulse repetition time, logic 1
TSTOP
Write pulse length, stop condition
LF Field Power On Reset, Note 2
Note 1
tSTART
Transponder initialization time
tINIT
Transponder initialization time
tRESET,SETUP LF Field Power On Reset setup time
Read Only Mode
BFIELD = 35μT
BFIELD = 100μT
tWAIT,SA
tWAIT,RO
Timeout for START_AUTH command
Read Only Mode startup delay
Note 3
MIN
TYP MAX UNIT
199
206
TO
90
TO
615
TO
80
ms
32
TO
4
10
TO
18
22
TO
26
32
TO
36
TO
80
μs
225
TO
5
ms
320
TO
326
TO
Notes
1. As detected by the transponder interface demodulator. The corresponding LF Field write pulse width applied by the
basestation depends on the resonance circuit properties and actual system coupling factor.
2. Characterized with the Scemtech test equipment STM-1 in a Helmholtz arrangement according to section 11.
3. Total delay (Tinit + Twait,RO) = 551 T0
2010 May 04
28
CONFIDENTIAL
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