DS2401 Maxim, DS2401 Datasheet - Page 10

• Manufacturer Part Number: DS2401
• Description: The DS2401 enhanced Silicon Serial Number is a low-cost, electronic registration number that provides an absolutely unique identity which can be determined with a minimal electronic interface (typically, a single port pin of a microcontroller)
• Manufacturer: Maxim

NOTES:
1) All voltages are referenced to ground.
2) V
3) Input load is to ground.
4) An additional reset or communication sequence cannot begin until the reset high time has expired.
5) Read data setup time refers to the time the host must pull the 1-Wire bus low to read a bit. Data is
6) V
7) 30 nanocoulombs per 72 time slots at 5.0V.
8) At V
9) Capacitance on the I/O pin could be 800pF when power is first applied. If a 5kΩ resistor is used to
10) The reset low time (t
11) The optimal sampling point for the master is as close as possible to the end time of the t
12) The duration of the low pulse sent by the master should be a minimum of 1μs with a maximum value
PACKAGE INFORMATION
For the latest package outline information and land patterns (footprints), go to www.maxim-ic.com/packages. Note that a “+”,
“#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the
drawing pertains to the package regardless of RoHS status.
PACKAGE TYPE
guaranteed to be valid within 1µs of this falling edge and will remain valid for 14µs minimum (15µs
total from falling edge on 1-Wire bus).
pullup the I/O line to V
normal communications.
otherwise it could mask or conceal interrupt pulses if this device is used in parallel with a DS2404 or
DS1994.
without exceeding t
the pullup resistor to recover to a high level. For a R ead-Zero Time slot, it ensures that a r ead will
occur before the fastest 1-Wire device(s) releases the line.
as short as possible to allow time for the pullup resistor to recover the line to a high level before the
1-Wire device samples in the case of a Write-One Time or before the master samples in the case of a
Read-One Time.
PUP
IH
(straight leads)
(formed leads)
2 Flip Chip
4 SOT-223
is a function of the external pullup resistor and V
PUP
3 TO-92
3 TO-92
= external pullup voltage.
6 TSOC
= 5.0V with a 5kΩ pullup to V
RDV
RSTL
. For the case of a Read-One Time slot, this maximizes the amount of time for
PUP
) should be restricted to a maximum of 960µs, to allow interrupt signaling,
PACKAGE CODE
, 5µs after power has been applied the parasite capacitance will not affect
BF211#1
Q3+1
Q3+4
D6+1
K3+1
PUP
and a maximum time slot of 120µs.
10 of 11
PUP
OUTLINE NO.
.
21-0248
21-0250
21-0382
21-0264
21-0378
LAND PATTERN NO.
Refer to
90-0321
—
—
—
21-0378
RDV
period