PCA9537 Datasheet, PDF (11/17 Pages) NXP Semiconductors – 4-bit I2C and SMBus low power I/O port with interrupt and reset

Philips Semiconductors
4-bit I²C and SMBus low power I/O port
with interrupt and reset
Product data sheet
PCA9537
AC SPECIFICATIONS
SYMBOL
PARAMETER
STANDARD MODE
I²C-bus
MIN
MAX
f_SCL
t_BUF
t_HD;STA
t_SU;STA
t_SU;STO
t_HD;DAT
t_VD;ACK
t_VD;DAT
t_SU;DAT
t_LOW
t_HIGH
t_F
t_R
t_SP
Operating frequency
0
Bus free time between STOP and START conditions
4.7
Hold time after (repeated) START condition
4.0
Repeated START condition setup time
4.7
Setup time for STOP condition
4.0
Data in hold time
0
Valid time for ACK condition²
0.3
Data out valid time³
300
Data setup time
250
Clock LOW period
4.7
Clock HIGH period
4.0
Clock/Data fall time
—
Clock/Data rise time
—
Pulse width of spikes that must be suppressed by the
—
input filters
100
—
—
—
—
—
3.45
—
—
—
—
300
1000
50
Port Timing
t_PV
Output data valid
t_PS
Input data setup time
t_PH
Input data hold time
Interrupt Timing
—
200
100
—
1
—
t_IV
t_IR
RESET
Interrupt valid
Interrupt reset
—
4
—
4
t_W
t_REC
t_RESET
Reset pulse width
Reset recovery time
Time to reset
4
—
0
—
400
—
NOTES:
1. C_b = total capacitance of one bus line in pF.
2. t_VD;ACK = time for Acknowledgement signal from SCL LOW to SDA (out) LOW.
3. t_VD;DAT = minimum time for SDA data out to be valid following SCL LOW.
FAST MODE
I²C-bus
MIN
MAX
0
400
1.3
—
0.6
—
0.6
—
0.6
—
0
—
0.1
0.9
50
—
100
—
1.3
—
0.6
—
20 + 0.1 C_b1
300
20 + 0.1 C_b1
300
—
50
—
200
100
—
1
—
—
4
—
4
4
—
0
—
400
—
UNITS
kHz
µs
µs
µs
µs
ns
µs
ns
ns
µs
µs
ns
ns
ns
ns
ns
µs
µs
µs
ns
ns
ns
SDA
t_BUF
t_LOW
t_R
t_F
SCL
P
t_HD;STA
S
t_HD;DAT
t_HIGH
t_SU;DAT
t_HD;STA
t_SU;STA
Sr
Figure 12. Definition of timing
t_SP
t_SU;STO
P
SU00645
2004 Nov 29
11