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HCS410 Datasheet(PDF) 31 Page - Microchip Technology

Part # HCS410
Description  KEELOQ CODE HOPPING ENCODER AND TRANSPONDER
PDF  36 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

HCS410 Datasheet(HTML) 31 Page - Microchip Technology

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HCS410
© 1997 Microchip Technology Inc.
Preliminary
DS40158C-page 31
FIGURE 5-3:
TYPICAL VOLTAGE TRIP POINTS
TABLE 5-5:
CODE WORD TRANSMISSION TIMING PARAMETERS—MANCHESTER MODE
VDD = +2.0V to 6.3V
Commercial
(C): Tamb = 0
°C to +70°C
Industrial
(I): Tamb = -40
°C to +85°C
Code Words Transmitted
BSL1 = 0,
BSL0 = 0
BSL1 = 0,
BSL0 = 1
Symbol
Characteristic
Number
of TE
Min.
Typ.
Max.
Number
of TE
Min.
Typ.
Max.
Units
TE
Basic pulse element
1
720.0
800.0
880.0
1.0
360.0
400.0
440.0
µs
TP
Preamble duration
32
23.04
25.60
28.16
32.0
11.52
12.80
14.08
ms
TH
Header duration
4
2.88
3.20
3.52
4.0
1.44
1.60
1.76
ms
TSTART
Start bit
2
1.44
1.60
1.76
2.0
0.72
0.80
0.88
ms
THOP
Code hopping duration
64
46.08
51.20
56.32
64.0
23.04
25.60
28.16
ms
TFIX
Fixed code duration
74
53.28
59.20
65.12
74
26.64
29.60
32.56
ms
TSTOP
Stop bit
2
1.44
1.60
1.76
2.0
0.72
0.80
0.88
ms
TG
Guard time
32
23.0
25.6
28.2
32
11.5
12.8
14.1
ms
—
Total transmit time
210
151.2
168
184.8
210
75.6
84.0
92.4
ms
Note: The timing parameters are not tested but derived from the oscillator clock.
VDD = +2.0V to 6.3V
Commercial
(C): Tamb = 0
°C to +70°C
Industrial
(I): Tamb = -40
°C to +85°C
Code Words Transmitted
BSL1 = 1,
BSL0 = 0
BSL1 = 1,
BSL0 = 1
Symbol
Characteristic
Number
of TE
Min.
Typ.
Max.
Number
of TE
Min.
Typ.
Max.
Units
TE
Basic pulse element
1
360.0
400.0
440.0
1.0
180.0
200.0
220.0
µs
TP
Preamble duration
32
11.52
12.80
14.08
32.0
5.76
6.40
7.04
ms
TH
Header duration
4
1.44
1.60
1.76
4.0
0.72
0.80
0.88
ms
TSTART
Start bit
2
0.72
0.80
0.88
2.0
0.36
0.40
0.44
ms
THOP
Code hopping duration
64
23.04
25.60
28.16
64.0
11.52
12.80
14.08
ms
TFIX
Fixed code duration
74
26.64
29.60
32.56
74
13.32
14.8
16.28
ms
TSTOP
Stop bit
2.0
0.72
0.80
0.88
2.0
0.36
0.40
0.44
ms
TG
Guard time
32
11.5
12.8
14.1
32
5.8
6.4
7.0
ms
—
Total transmit time
210
75.6
84.0
92.4
210
37.8
42.0
46.2
ms
Note: The timing parameters are not tested but derived from the oscillator clock.
VLOW
Volts (V)
-40
050
85
2.0
1.6
1.8
2.2
2.4
2.6
Temp (C)
VLOW sel = 0
4.4
4.0
4.2
3.8
4.6
4.8
5.0
VLOW sel = 1
2.8
Nominal VLOW trip point
Legend



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