Philips Semiconductors
Product specification
Temperature monitor for microprocessor systems
NE1617
SMBUS INTERFACE AC SPECIFICATIONS
V
= 3.0V to 3.6V; T
= 0_C to +125_C unless otherwise noted.
DD
amb
These specifications are guaranteed by design and not tested in production.
SYMBOL
PARAMETER
CONDITIONS
=3V to 5.5V
MIN
TYP
MAX
UNIT
V
V
IH
Logic input high voltage for STBY, SCLK, SDATA
Logic input low voltage for STBY, SCLK, SDATA
V
2.2
DD
V
IL
V
DD
=3v to 5.5V
0.8
V
I
OL
Logic output low sink current for
ALERT
SDATA
V
= 0.4V
1.0
6.0
mA
mA
OL
V L=0.6V
O
I
& I
Logic input current
V
IN
=V or GND
–1.0
1.0
µA
pF
IH
IL
DD
C
SMBus input capacitance for SCLK,SDATA
SCLK operating frequency
SCLK low time
5
IN
f
t
See Figure 3
See Figure 3
See Figure 3
See Figure 3
0
100
kHz
µS
µS
µS
SCLK
t
4.7
4.0
4.7
5.0
5.0
LOW
SCLK high time
HIGH
t
SMBus free time.
BUF
Delay from SDA stop to SDA start
t
Hold time of start condition.
Delay from SDA start to first SCL H–L
See Figure 3
See Figure 3
See Figure 3
See Figure 3
See Figure 3
See Figure 3
4.0
0
µS
ns
ns
ns
µS
µS
HD:STA
HD:DAT
t
Hold time of data.
Delay from SCL H–L to SDA edges
t
Setup time of data.
Delay from SDA edges to SCL L–H
250
250
4.0
SU:DAT
t
Setup time of repeat start condition.
Delay from SCL L–H to restart SDA
SU:STA
t
Setup time of stop condition.
Delay from SCL L–H to SDA stop.
SU:STO
t
F
Fall time of SCL & SDA
1.0
t
t
R
t
LOW
t
F
HD:STA
SCLK
t
t
HIGH
t
HD:STA
SU:STO
t
SU:STA
t
t
HD:DAT
SU:DAT
SDATA
t
BUF
P
S
S
P
SL01204
Figure 3. Timing Measurements
NOTE:
The NE1617 does not include the SMBUS timeout capability (t
and t
).
LOW:SEXT
LOW:MEXT
6
1999 Mar 19
NXP [ NXP ]
