SDA5273-2 SIEMENS [Siemens Semiconductor Group], SDA5273-2 Datasheet - Page 17

• Manufacturer Part Number: SDA5273-2
• Description: ICs for Consumer Electronics MEGATEXT and MEGATEXT PLUS ICs
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

Characteristics (cont’d)
T
Parameter
M3L-Mode Timing (cont’d)
Set-up time SDA to I
rising edge
Set up time I
falling edge
I
Delay from SCL-falling edge
until SDA-open drain output
stage changes impedance
L-SDA level output
impedance
The resulting delay of SDA-output data is the sum of the open drain stage plus the time
determined by the bus capacitance and the external pullup resistor or the impedance of the
internal open drain pulldown transistor respectively.
Wait condition
To force the M3L-master to interrupt the transmission sequence until MEGATEXT is ready for
more data, MEGATEXT can force down SCL after the transmission of a complete byte. At that
time the bus master has to switch its SCL-output to high impedance and check the state of SCL
afterwards.During SCL check
Delay from SCL-rising edge
to SCL forced low for WAIT-
condition
An internal pullup transistor restores SCL high level at the end of the WAIT-condition.
SCL-pullup time at the end of
WAIT
Reference Voltage:
Voltage level
Input leakage current
V
Semiconductor Group
2
A
REF
CEN-high time
= 0 to 70 C
influences the DAC-range, the CVBS-output at pin TCSQ and the CVBS-ADC range.
2
CEN to SDA-
2
V
CEN-
REF
I
2
Symbol
t
t
t
t
CEN has to be low.
t
t
V
I
IM
IS
IH
DO
DWAIT
RWAIT
l
REF
min.
400
400
1000
400
500
70
2.8
– 10
Limit Values
17
typ.
100
3.0
max.
600
750
100
3.5
10
Unit
ns
ns
ns
ns
ns
ns
V
A
Test Condition
I
V
2
REF
CEN = 0
SDA 5273-2 / 75-2
= 3 V
SDA 5273 / 75
1997-09-01