HCS473/SL Microchip Technology, HCS473/SL Datasheet - Page 55

• Manufacturer Part Number: HCS473/SL
• Description: IC KEELOQ 3AXIS TRANSCODR 14SOIC
• Manufacturer: Microchip Technology
• Series: KEELOQ®r
• Type: Code Hopping Encoder and Transponderr

Specifications of HCS473/SL

• Applications: Access Control Systems
• Mounting Type: Surface Mount
• Package / Case: 14-SOIC (3.9mm Width), 14-SOL
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

TABLE 7-4:
 2002 Microchip Technology Inc.
AC Characteristics
General HCS473 Timing
T
T
T
T
T
T
Communication from Transponder Reader to HCS473
T
T
T
Response from HCS473 to Transponder Reader
T
T
T
T
T
T
T
T
T
T
Timing Element T
T
Analog delays
T
T
T
T
Note 1: Fosc = 4 MHz. F
Symbol
CMD
SF
WRT
AOACK
E
ANTR
ANTF
DB
QUE
PU
PLL
LEDON
LEDOFF
TSCMD
FINH
TSACK
TPACK
IFF
READ
HOP
DAMP
DEMOD
FILTR
FILTF
2: LF
3: Response timing accounts for T
4: Timing parameters are characterized but not tested.
oscillator variation.
must compensate communication accordingly for T
1.1 LF
1.1 LF
.9 LF
TE
1 ms+.9 LF
.9 LF
1.08 LF
14.76 ms
is based on the HCS473’s timing, not the timing of the transponder reader. Therefore LF
9.81 ms
17.1 ms
5.07 ms
17.1 ms
450 ms
100 µs
141 µs
184 µs
90 ms
9 ms
60 µs
Min
1.8s
TE
TE
TE
180
360
720
TE
AC CHARACTERISTICS, Commercial Temperature Devices
90
—
—
—
E
+100 µs
+100 µs
+14 µs
-12 µs
TE
TE
Hardware design dependent
Hardware design dependent
OSC
= 4 MHz may be centered at the designer’s choice of supply voltage (V
3.5 ms+1 LF
1 LF
1.2 LF
10.9 ms
5.64 ms
16.4 ms
100 ms
500 ms
10 ms
1 LF
1 LF
179 µs
227 µs
Typ (1)
19 ms
19 ms
89 µs
15 µs
70 µs
4 ms
TE
100
200
400
800
2s
—
—
+30 µs
TE
TE
TE
FILTR
TE
but not for T
Tamb = 0°C to 70°C, 2.05V < V
F
OSC
10 ms+1. 1LF
1.1 LF
1.1 LF
1.32 LF
20.9 ms
9.18 ms
9.18 ms
20.9 ms
110 ms
550 ms
234 µs
135 µs
6.2 ms
286 µs
12 ms
18 ms
= 4 MHz ±10%
11 ms
Preliminary
10ms
Max
2.2s
220
440
880
110
TE
TE
—
—
—
+49 µs
+12 µs
ANTR
TE
ANTR
TE
or T
and T
ANTF
Debounce Time
Que Window
Power-up Delay Time (includes button debounce)
Encoder Mode PLL activation to first code word
LED ON Time
LED OFF Time
Delay from Transponder Select ACK to next command
Time to leave LF on after last data bit’s rising edge
Delay to wake-up Acknowledge sequence
Delay from TID pulse rising edge to TID acknowledge
TID = 0
TID > 0
Delay to Transport Code Acknowledge
Delay to Write Acknowledge
Delay to anticollision off Acknowledge
Delay to IFF response - RF or LF response
Delay to read response - RF or LF response
Delay to hopping code response - RF or LF response
Delay from detecting LC rising edge to first damp pulse
Demodulator mode window looking for edge on LC pin
RFT
RFBSL = LFBSL = 00
RFBSL = LFBSL = 01
RFBSL = LFBSL = 10
RFBSL = LFBSL = 11
HCS473 analog LF filter charge time
HCS473 analog LF filter discharge time
Cumulative LF antenna delay when field is turned on
Cumulative LF antenna delay when field is turned off
ANTF
E
, as they are design dependent. The system designer
or LFT
.
E
DD
< 5.5V
2
2
2
2
Description
DD
TE
) and temperature.
is subject to HCS473
HCS473
DS40035C-page 53