DS2408 Maxim, DS2408 Datasheet - Page 5

• Manufacturer Part Number: DS2408
• Description: The DS2408 is an 8-channel, programmable I/O 1-Wire® chip
• Manufacturer: Maxim

1)
PIN DESCRIPTION
t
t
t
t
t
t
PARAMETER
SLOT
RSTL
PDH
PDL
W0L
SLS
Intentional change, longer recovery-time requirement due to modified 1-Wire front end.
, t
PIN
NAME
10
11
12
13
14
15
16
(incl. t
SPD
1
2
3
4
5
6
7
8
9
REC
)
NAME
RSTZ
GND
N.C.
N.C.
N.C.
N.C.
V
I/O
P0
P7
P6
P5
P4
P3
P2
P1
480µs
MIN
61µs
15µs
60µs
60µs
15µs
CC
STANDARD
SPEED
STANDARD VALUES
Not Connected
I/O Pin of Channel 0. Logic input/open-drain output with 100Ω maximum
on-resistance; 0V to 5.25V operating range. Power-on default is
indeterminate. If it is application-critical for the outputs to power up in the
"off" state, the user should attach an appropriate power-on-reset circuit or
supervisor IC to the RSTZ pin.
Optional Power Supply Input. Range 2.8V to 5.25V; must be tied to GND
if not used.
1-Wire Interface. Open-drain, requires external pullup resistor.
Ground
Not Connected
I/O Pin of Channel 7. Same characteristics as P0.
I/O Pin of Channel 6. Same characteristics as P0.
I/O Pin of Channel 5. Same characteristics as P0.
SW configurable PIO reset input (
(
the "off" state by setting all bits in the PIO Output Latch State Register.
When configured as
(see Channel-Access Write command) or after a PIO Read (see Channel-
Access Read command). The power-on default function of this pin is
I/O pin of channel 4; same characteristics as P0
I/O pin of channel 3; same characteristics as P0
I/O pin of channel 2; same characteristics as P0
I/O pin of channel 1; same characteristics as P0
Not connected
Not connected
RST
STRB
(undef.)
(undef.)
240µs
120µs
MAX
60µs
60µs
.
). When configured as
MIN
48µs
OVERDRIVE
7µs
2µs
8µs
6µs
2µs
SPEED
5 of 39
STRB
(undef.)
MAX
80µs
24µs
16µs
6µs
6µs
, an output strobe will occur after a PIO write
DESCRIPTION
RST
, a LOW input sets all PIO outputs to
65µs
RST
660µs
MIN
15µs
60µs
60µs
15µs
STANDARD
) or open-drain strobe output
SPEED
1)
DS2408 VALUES
(undef.)
720µs
280µs
120µs
MAX
60µs
60µs
1.8µs
MIN
10µs
53µs
OVERDRIVE
2µs
7µs
8µs
SPEED
(undef.)
MAX
80µs
27µs
13µs
7µs
8µs
DS2408