DS2480B Maxim Integrated Products, DS2480B Datasheet - Page 31

• Manufacturer Part Number: DS2480B
• Description: IC LINE DRVR W/SENSOR 1-W 8-SOIC
• Manufacturer: Maxim Integrated Products
• Type: Line Driver, Transmitterr

Specifications of DS2480B

• Number Of Drivers/receivers: 1/0
• Protocol: RS232
• Voltage - Supply: 4.5 V ~ 5.5 V
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

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. 8.68ms (115.2kbps), 52ms (19.2kbps), 17.36ms (57.6kbps), 104ms (9.6kbps).
7. Nominal values; tolerance = ±5%.
8. At V
9. See Table 7, Function and Speed Matrix.
10. Independent of baud rate.
11. Minimum at 115.2kbps, maximum at 9.6kbps.
12. The master reset cycle is complete after t
13. Minimum value at Overdrive speed; maximum value at regular speed.
14. D is the time to complete the activity on the 1-Wire bus; values range from 0 (configuration
15. With regular and flexible speed the total capacitive load of the 1-Wire bus should not exceed 20nF,
16. Baud rate calibration is valid at a static V
17. Not production tested.
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 Pullup on Time
Response Time
1mA.
command) up to 5130ms (alarming presence pulse).
otherwise the active pullup on threshold V
Overdrive speed the capacitive load on the 1-Wire bus must not exceed 1nF.
than 5% may cause calibration error to exceed 5%. The DS2480B requires a 1-Wire reset command
sent by the host at a data rate of 9600bps for calibration. Data rates of 115200bps or higher during
calibration may put the DS2480 in an undefined state, requiring a power-down reset to restore normal
operation.
PP
- DV
CC
PARAMETER
= 5.0V and 100pF load to GND.
PROG
must be within 11.5V to 12.0V.
DD
PP
and 1-W.
and 1-W.
SYMBOL
t
t
t
t
APUOT
t
IDLET
IDLER
ASYM
t
t
RESP
t
T
t
ARR
T
MR
RR
FR
T
R
MR
DD
is over.
operating point. Post calibration changes in V
31 of 31
IAPO
PP
8.68 + D
may not be reached in the available time. With
MIN
8.68
8.68
and V
104
4.4
0.5
13
8
0
(V
DD
DD
are tied together, current is less than
= 4.5V to 5.5V; -40°C to +85°C)
t
TYP
IDLET
104 + D
MAX
104
104
2.0
20
27
52
1
UNITS
µs
µs
ns
ns
µs
µs
µs
µs
µs
µs
µs
DD
NOTES
by more
6, 7, 16
11, 14
8,17
8,17
10
11
12
13
6
9