DS2480 Dallas Semiconducotr, DS2480 Datasheet - Page 26

• Manufacturer Part Number: DS2480
• Description: Serial 1.Wire Line Driver
• Manufacturer: Dallas Semiconducotr

AC ELECTRICAL CHARACTERISTICS
NOTES:
1. V
2. Applies only if a 12.0V supply is connected. If V
3. Input load is to GND.
4. Voltage difference between V
5. Voltage difference between V
6. 8.68 s (115.2 kbps), 52 s (19.2 kbps), 17.36 s (57.6 kbps), 104 s (9.6 kbps).
7. Nominal values; tolerance = 5%.
8. At V
9. See Table 7, Function and Speed Matrix.
10. Independent of baud rate.
11. Minimum at 115.2 kbps, maximum at 9.6 kbps.
12. The master reset cycle is complete after t
13. Minimum value at Overdrive speed; maximum value at regular speed.
14.
DS2480
042498 26/26
PARAMETER
UART Bit Time
Device Bit Time
Fall Time RXD
Rise Time RXD
Transmit Idle Time
Receive Idle Time
Asymmetry
Arrival Response Time
Master Reset Time
Active Pull–Up on Time
Response Time
5130 s (alarming presence pulse)
PP
is the time to complete the activity on the 1–Wire bus; values range from 0 (configuration command) up to
CC
– V
= 5.0V and 100 pF load to GND.
PROG
must be within 11.5 to 12.0V.
DD
PP
and 1–W.
and 1–W.
SYMBOL
t
t
t
t
APUOT
t
IDLER
IDLET
ASYM
t
RESP
t
ARR
t
t
T
T
MR
FR
RR
R
T
MR
is over.
8.68 +
PP
8.68
8.68
MIN
104
4.4
0.5
13
8
0
and V
DD
are tied together, current is less than 1 A.
t
TYP
IDLET
(V
DD
104 +
MAX
= 4.5V to 5.5V;–40 C to 85 C)
104
104
2.0
20
27
52
1
UNITS
ns
ns
s
s
s
s
s
s
s
s
s
NOTES
11, 14
6, 7
10
12
13
11
6
8
8
9