Rainbow Electronics MAX7470 - Manual (Page 4)

MAX7469/MAX7470
HDTV Continuously Variable
Anti-Aliasing Filters
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TIMING CHARACTERISTICS
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Serial-Clock Frequency f SCL 0 400 kHz
Bus Free Time Between STOP (P)
and START (S) Condition
t BUF 1.3 µs
Hold Time (Repeated) START (Sr)
Condition
t HD;STA
After this period, the first clock pulse is
generated
0.6 µs
SCL Pulse-Width Low t LOW 1.3 µs
SCL Pulse-Width High t HIGH 0.6 µs
Setup Time for a Repeated
START (Sr) Condition
t SU;STA 0.6 µs
Data Hold Time t HD;DAT (Note 5) 0.0 0.9 µs
Data Setup Time t SU;DAT 100 ns
Rise Time of Both SDA and SCL
Signals, Receiving
t r 0 300 ns
Fall Time of Both SDA and SCL
Signals, Receiving
t f 0 300 ns
Fall Time of SDA Signal,
Transmitting
t f (Note 6)
20 +
0.1C b
250 ns
Setup Time for STOP (P)
Condition
t SU;STO 0.6 µs
Capacitive Load for Each Bus
Line
C b 400 pF
Pulse Width of Spikes that Are
Suppressed by the Input Filter
t SP (Note 7) 0 50 ns
(AV DD = +5V ±5%, DV DD = 2.7V to 3.6V, R LOAD = 150Ω to GND, C IN = 0.1µF, T A = 0°C to +85°C, unless otherwise noted. Typical
values are at AV DD = 5V, DV DD = 3.3V, T A = +25°C.)
Note 1: The filter passband edge is set to code 255.
Note 2: The filter passband edge is set to code 40.
Note 3: 1H is the total line period, depending on the video standard. For NTSC, this is 63.5µs; for HDTV, the line period is 29.64µs.
Note 4: The clamp level is at the sync tip for signals with sync pulses, and at the blanking level otherwise.
Note 5: A master device must provide a hold time of at least 300ns for the SDA signal (referred to V
IL of the SCL signal) to bridge
the undefined region of SCL’s falling edge.
Note 6: C
b
= total capacitance of one bus line in pF. t
R
and t
F
measured between 0.3V
DD
and 0.7V
DD
.
Note 7: Input filters on the SDA and SCL inputs suppress noise spikes less than 50ns.