HCS473_13 Datasheet, PDF (54/68 Pages) Microchip Technology – KEELOQ® 3-Axis Transcoder

HCS473
TABLE 7-5: AC CHARACTERISTICS, Industrial Temperature Devices⁽⁴⁾
AC Characteristics
Tamb = -20°C to 85°C, 2.05V < VDD  3.5V unless stated otherwise
FOSC = 4 MHz ±10%
Symbol
Min
Typ⁽¹⁾
Max
Description
General HCS473 Timing
TDB
9 ms
10 ms
11 ms
Debounce Time
9 ms
10 ms
12 ms
3.5V < VDD < 5.5V⁽⁴⁾
TQUE
1.8s
2s
1.8s
2s
2.2s
Que Window
2.4s
3.5V < VDD < 5.5V⁽⁴⁾
TPU
9.81 ms
10.9 ms
12 ms
Power-up Delay Time (includes button debounce)
9.81 ms
10.9 ms
13.08 ms
3.5V < VDD < 5.5V⁽⁴⁾
TPLL
17.1 ms
17.1 ms
19 ms
19 ms
20.9 ms
22.8 ms
Encoder Mode PLL activation to first code word
3.5V < VDD < 5.5V⁽⁴⁾
TLEDON
90 ms
90 ms
100 ms
100 ms
110 ms
120 ms
LED ON Time
3.5V < VDD < 5.5V⁽⁴⁾
TLEDOFF
450 ms
450 ms
500 ms
500 ms
550 ms
600 ms
LED OFF Time
3.5V < VDD < 5.5V⁽⁴⁾
Communication from Transponder Reader to HCS473
TCMD 1.1 LFTE+100 s
—
1.2 LFTE+100 s
—
9.18 ms
9.18 ms
3.5V < VDD < 5.5V⁽⁴⁾
TTSCMD 1.1 LFTE+100 s
—
1.2 LFTE+100 s
—
9.18 ms
9.18 ms
Delay from Transponder Select ACK to next command
3.5V < VDD < 5.5V⁽⁴⁾
TFINH
100 s
1LFTE
—
Time to leave LF on after last data bit’s rising edge
Response from HCS473 to Transponder Reader
TSF
1 ms+.9 LFTE 3.5 ms+1 LFTE 10 ms+1.1 LFTE Delay to wake-up ACK⁽⁴⁾
1 ms+.9 LFTE 3.5 ms+1 LFTE 10 ms+1.2 LFTE
TTSACK
.9 LFTE+14 s
.9 LFTE+14 s
1 LFTE+30 s
1 LFTE+30 s
Delay from TID pulse rising edge to TID Acknowledge
1.1 LFTE+49 s TID = 0
1.2 LFTE+53 s 3.5V < VDD < 5.5V⁽⁴⁾
.9 LFTE-10 s
.9 LFTE-10 s
1 LFTE
1 LFTE
1.1 LFTE+12 s TID > 0
1.2 LFTE+13.2 s 3.5V < VDD < 5.5V⁽⁴⁾
TTPACK
141 s
141 s
179 s
179 s
234 s
255 s
Delay to Transport Code Acknowledge
3.5V < VDD < 5.5V⁽⁴⁾
TWRT
—
4 ms
10 ms
Delay to Write Acknowledge
TAOACK
60 s
60 s
89 s
89 s
135 s
147 s
Delay to anticollision off Acknowledge
3.5V < VDD < 5.5V⁽⁴⁾
TIFF
5.07 ms
5.64 ms
6.2 ms
Delay to IFF response - RF or LF response
5.07 ms
5.64 ms
6.8 ms
3.5V < VDD < 5.5V⁽⁴⁾
TREAD
184 s
184 s
227 s
227 s
286 s
312 s
Delay to read response - RF or LF response
3.5V < VDD < 5.5V⁽⁴⁾
THOP
17.1 ms
17.1 ms
19 ms
19 ms
20.9 ms
22.8 ms
Delay to hopping code response - RF or LF response
3.5V < VDD < 5.5V⁽⁴⁾
TDAMP
1.08 LFTE
1.08 LFTE
1.2 LFTE
1.2 LFTE
1.32 LFTE
1.44 LFTE
Delay from detecting LC rising edge to first damp pulse
3.5V < VDD < 5.5V⁽⁴⁾
TDEMOD
14.76 ms
14.76 ms
16.4 ms
16.4 ms
18 ms
19.7 ms
Demodulator mode window looking for edge on LC pin
3.5V < VDD < 5.5V⁽⁴⁾
Timing Element TE
TE
RFTE or LFTE
90
100
180
200
360
400
720
800
110
RFBSL = LFBSL = 00₂
220
RFBSL = LFBSL = 01₂
440
RFBSL = LFBSL = 10₂
880
RFBSL = LFBSL = 11₂
DS40035D-page 54
Preliminary
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