DS92LX1621 Datasheet, PDF (13/44 Pages) National Semiconductor (TI) – 10 - 50 MHz Channel Link III Serializer and Deserializer with Embedded Bi-Directional Control Channel

Bi-Directional Control Bus Timing Specifications (SCL, SDA) - (Figure 4)
Over recommended operating supply and temperature ranges unless otherwise specified.
Symbol
Parameter
Conditions
Min
Typ
Max Units
RECOMMENDED INPUT TIMING REQUIREMENTSRECOMMENDED INPUT TIMING REQUIREMENTS ((Note 13))
f_SCL
f_LOW
f_HIGH
t_HD:STA
SCL Clock Frequency
SCL Low Period
SCL High Period
f_SCL = 100 kHz
Hold time for a start or a repeated start
condition
>0
100
kHz
4.7
µs
4.0
µs
4.0
µs
t_SU:STA
Set Up time for a start or a repeated
start condition
4.7
µs
t_HD:DAT Data Hold Time
t_SU:DAT Data Set Up Time
t_SU:STO Set Up Time for STOP Condition,
t_r
SCL & SDA Rise Time
t_f
SCL & SDA Fall Time
C_b
Capacitive load for bus
SWITCHING CHARACTERISTICS ((Note 9))
0
3.45
µs
250
ns
4.0
µs
1000
ns
300
ns
400
pF
f_SCL
SCL Clock Frequency
Serializer M/S = 0 – R/W Register
0x05 = 0x40'h
Deserializer M/S = 0 – READ
Register 0x06 b[6:4] = 0x00'h
100
kHz
100
Serializer M/S = 0 – R/W Register
0x05 = 0x40'h
f_LOW
SCL Low Period
4.7
Deserializer M/S = 0 – READ
μs
Register 0x06 b[6:4] = 0x00'h
Serializer M/S = 0 – R/W Register
0x05 = 0x40'h
f_HIGH
SCL High Period
4.0
Deserializer M/S = 0 – READ
μs
Register 0x06 b[6:4] = 0x00'h
t_HD:STA
Hold time for a start or a repeated start Serializer M/S = 0 Register 0x05 =
condition
0x40'h
4.0
μs
t_SU:STA
Set Up time for a start or a repeated Serializer M/S = 0 Register 0x05 =
start condition
0x40'h
4.7
μs
t_HD:DAT
t_SU:DAT
t_SU:STO
t_f
t_BUF
Data Hold Time
Data Set Up Time
Set Up Time for STOP Condition
Serializer M/S = 0
SCL & SDA Fall Time
Bus free time between a stop and start Serializer M/S = 0
condition
0
3.45
μs
250
ns
4.0
μs
300
ns
4.7
μs
t_TIMEOUT NACK Time out
Serializer M/S = 1
Deserializer MODE = 1
Register 0x06 b[2:0]=111'b
1
ms
25
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