HCS473
DS40035C-page 54
Preliminary
2002 Microchip Technology Inc.
TABLE 7-5:
AC CHARACTERISTICS, Industrial Temperature Devices
(4)
Tamb = -20°C to 85°C,
2.05V < V
DD
≤
3.5V unless stated otherwise
F
OSC
= 4 MHz ±10%
AC Characteristics
Symbol
Min
Typ
(1)
Max
Description
General HCS473 Timing
T
DB
9 ms
9 ms
1.8s
1.8s
9.81 ms
9.81 ms
17.1 ms
17.1 ms
90 ms
90 ms
450 ms
450 ms
10 ms
10 ms
2s
2s
10.9 ms
10.9 ms
19 ms
19 ms
100 ms
100 ms
500 ms
500 ms
11 ms
12 ms
2.2s
2.4s
12 ms
13.08 ms
20.9 ms
22.8 ms
110 ms
120 ms
550 ms
600 ms
Debounce Time
3.5V < V
DD
< 5.5V
(4)
Que Window
3.5V < V
DD
< 5.5V
(4)
Power-up Delay Time (includes button debounce)
3.5V < V
DD
< 5.5V
(4)
Encoder Mode PLL activation to first code word
3.5V < V
DD
< 5.5V
(4)
LED ON Time
3.5V < V
DD
< 5.5V
(4)
LED OFF Time
3.5V < V
DD
< 5.5V
(4)
T
QUE
T
PU
T
PLL
T
LEDON
T
LEDOFF
Communication from Transponder Reader to HCS473
T
CMD
1.1 LF
TE
+100
μ
s
1.2 LF
TE
+100
μ
s
T
TSCMD
1.1 LF
TE
+100
μ
s
1.2 LF
TE
+100
μ
s
T
FINH
100
μ
s
—
—
—
—
9.18 ms
9.18 ms
9.18 ms
9.18 ms
—
3.5V < V
DD
< 5.5V
(4)
Delay from Transponder Select ACK to next command
3.5V < V
DD
< 5.5V
(4)
Time to leave LF on after last data bit’s rising edge
1LF
TE
Response from HCS473 to Transponder Reader
T
SF
1 ms+.9 LF
TE
1 ms+.9 LF
TE
T
TSACK
.9 LF
TE
+14
μ
s
.9 LF
TE
+14
μ
s
.9 LF
TE
-10
μ
s
.9 LF
TE
-10
μ
s
T
TPACK
141
μ
s
141
μ
s
T
WRT
—
T
AOACK
60
μ
s
60
μ
s
T
IFF
5.07 ms
5.07 ms
T
READ
184
μ
s
184
μ
s
T
HOP
17.1 ms
17.1 ms
T
DAMP
1.08 LF
TE
1.08 LF
TE
T
DEMOD
14.76 ms
14.76 ms
3.5 ms+1 LF
TE
3.5 ms+1 LF
TE
10 ms+1.1 LF
TE
10 ms+1.2 LF
TE
Delay to wake-up ACK
(4)
1 LF
TE
+30
μ
s
1 LF
TE
+30
μ
s
1 LF
TE
1 LF
TE
179
μ
s
179
μ
s
4 ms
89
μ
s
89
μ
s
5.64 ms
5.64 ms
227
μ
s
227
μ
s
19 ms
19 ms
1.2 LF
TE
1.2 LF
TE
16.4 ms
16.4 ms
1.1 LF
TE
+49
μ
s
1.2 LF
TE
+53
μ
s
1.1 LF
TE
+12
μ
s
1.2 LF
TE
+13.2
μ
s
234
μ
s
255
μ
s
10 ms
135
μ
s
147
μ
s
6.2 ms
6.8 ms
286
μ
s
312
μ
s
20.9 ms
22.8 ms
1.32 LF
TE
1.44 LF
TE
18 ms
19.7 ms
Delay from TID pulse rising edge to TID Acknowledge
TID = 0
3.5V < V
DD
< 5.5V
(4)
TID > 0
3.5V < V
DD
< 5.5V
(4)
Delay to Transport Code Acknowledge
3.5V < V
DD
< 5.5V
(4)
Delay to Write Acknowledge
Delay to anticollision off Acknowledge
3.5V < V
DD
< 5.5V
(4)
Delay to IFF response - RF or LF response
3.5V < V
DD
< 5.5V
(4)
Delay to read response - RF or LF response
3.5V < V
DD
< 5.5V
(4)
Delay to hopping code response - RF or LF response
3.5V < V
DD
< 5.5V
(4)
Delay from detecting LC rising edge to first damp pulse
3.5V < V
DD
< 5.5V
(4)
Demodulator mode window looking for edge on LC pin
3.5V < V
DD
< 5.5V
(4)
Timing Element T
E
T
E
90
180
360
720
100
200
400
800
110
220
440
880
RFT
E
or LFT
E
RFBSL = LFBSL = 00
2
RFBSL = LFBSL = 01
2
RFBSL = LFBSL = 10
2
RFBSL = LFBSL = 11
2