MAX7321 Maxim, MAX7321 Datasheet - Page 3

• Manufacturer Part Number: MAX7321
• Description: The MAX7321 2-wire serial-interfaced peripheral features eight open-drain I/O ports with selectable internal pullups and transition detection
• Manufacturer: Maxim

PORT AND INTERRUPT INT TIMING CHARACTERISTICS
(V+ = +1.71V to +5.5V, T
TIMING CHARACTERISTICS
(V+ = +1.71V to +5.5V, T
Note 1: All parameters tested at T
Note 2: A master device must provide a hold time of at least 300ns for the SDA signal (referred to V
Note 3: Guaranteed by design.
Note 4: C
Note 5: Input filters on the SDA and SCL inputs suppress noise spikes less than 50ns.
Serial-Clock Frequency
Bus Free Time Between a STOP
and a START Condition
Hold Time (Repeated) START
Condition
Repeated START Condition
Setup Time
STOP Condition Setup Time
Data Hold Time
Data Setup Time
SCL Clock Low Period
SCL Clock High Period
Rise Time of Both SDA and SCL
Signals, Receiving
Fall Time of Both SDA and SCL
Signals, Receiving
Fall Time of SDA, Transmitting
Pulse Width of Spike Suppressed
Capacitive Load for Each Bus
Line
RST Pulse Width
RST Rising to START Condition
Setup Time
Port Output Data Valid
Port Input Setup Time
Port Input Hold Time
INT Input Data Valid Time
INT Reset Delay Time from STOP
INT Reset Delay Time from
Acknowledge
bridge the undefined region of SCL’s falling edge.
b
PARAMETER
PARAMETER
= total capacitance of one bus line in pF. I
I
2
_______________________________________________________________________________________
C Port Expander with 8 Open-Drain I/Os
A
A
= -40°C to +125°C, unless otherwise noted. Typical values are at V+ = +3.3V, T
= -40°C to +125°C, unless otherwise noted. Typical values are at V+ = +3.3V, T
A
= +25°C. Specifications over temperature are guaranteed by design.
SYMBOL
SYMBOL
t
t
t
t
t
HD, STA
SU, STO
HD, DAT
SU, DAT
SU, STA
t
t
t
t
t
f
HIGH
t
t
LOW
F,TX
SCL
BUF
t
RST
PPV
PSU
t
C
t
t
t
t
t
t
SP
PH
W
IV
IP
IR
R
F
b
(Note 2)
(Notes 3, 4)
(Notes 3, 4)
(Notes 3, 4)
(Note 5)
(Note 3)
C
C
C
C
C
C
L
L
L
L
L
L
≤ 100pF
≤ 100pF
≤ 100pF
≤ 100pF
≤ 100pF
≤ 100pF
SINK
≤ 6mA. t
CONDITIONS
CONDITIONS
R
and t
F
measured between 0.3 x V+ and 0.7 x V+.
MIN
MIN
100
500
1.3
0.6
0.6
0.6
1.3
0.7
0
4
1
IL
of the SCL signal) in order to
A
A
0.1C
0.1C
0.1C
TYP
20 +
20 +
20 +
TYP
= +25°C.) (Note 1)
= +25°C.) (Note 1)
50
b
b
b
MAX
MAX
400
300
300
250
400
0.9
4
4
4
4
UNITS
UNITS
kHz
pF
µs
µs
µs
µs
µs
µs
µs
µs
µs
µs
µs
ns
µs
µs
ns
ns
ns
ns
ns
µs
3