U4091BM TEMIC Semiconductors, U4091BM Datasheet - Page 25

• Manufacturer Part Number: U4091BM
• Description: Programmable Telephone Audio Processor
• Manufacturer: TEMIC Semiconductors

Electrical Characteristics (continued)
1)
Bus Timing
SDA
SCL
Threshold
Adjustment steps
threshold
Input impedance
Z-diode voltage
Serial bus SCL, SDA, AS, VMP = 3.3 V, RSDA = RSCL = RINT = 12 k
Input voltage
HIGH
LOW
Output voltage
Acknowledge LOW
Clock frequency
Rise time SDA, SCL
Fall time SDA, SCL
Period of SCL
HIGH
LOW
Setup time
Start condition
Data
Stop condition
Time space
Hold time
Start condition
DATA
Rev. A1, 02-Jun-98
This is a space of time where the bus must bee from data transmission and before a new transmission can be started
Parameters
P
t
wSTA
1)
S t
hSTA
V
low to high,
RINGTH [0:3] = 0
low to high
RINGTH [0:3] = 15
D
V
I
I
HIGH
LOW
RING
SDA
RING
RINGTH = 1
RING
t
L
Test Conditions / Pins
= 3 mA
= 15 mA
: high to low
= 30 V
t
r
P = Stop, S = Start
SDA, SCL, INT
t
Target Specification
hDAT
Figure 21. Bus timing diagram
SDA
SCL
t
t
H
f
V
Symbol
t
RINGmax
t
V
t
t
sSTA
t
t
t
sSTOP
f
wSTA
hDAT
sSTA
sDAT
hSTA
V
iBUS
SCL
t
t
t
t
H
L
r
f
O
Min.
30.8
250
6.3
0.8
3.0
4.0
4.7
4.7
4.7
4.7
4.0
20
4
0
0
W
t
hDAT
Typ.
4.5
22
7
1
5
t
hSTA
U4091BM
Max.
V
100
300
7.7
1.2
1.5
0.4
24
6
DD
1
t
sSTOP
Unit
kHz
k
m
m
m
m
m
m
m
m
ns
ns
V
V
V
V
V
V
V
V
s
s
s
s
s
s
s
s
95 10122
25 (29)
Fig.
P