DS92LX1621_16 Datasheet, PDF (12/49 Pages) Texas Instruments – 10 - 50 MHz DC-Balanced Channel Link III Serializer and Deserializer with Bi-Directional Control Channel

DS92LX1621, DS92LX1622
SNLS327I – MAY 2010 – REVISED JANUARY 2014
Bi-Directional Control Bus Timing Specifications (SCL, SDA) - (See Figure 6)
Over recommended operating supply and temperature ranges unless otherwise specified.
Symbol
Parameter
RECOMMENDED INPUT TIMING REQUIREMENTS⁽¹⁾
Conditions
Min
Typ
f_SCL
SCL Clock Frequency
>0
f_LOW
SCL Low Period
4.7
f_HIGH
SCL High Period
4.0
t_HD:STA
Hold time for a start or a repeated start
condition
4.0
t_SU:STA
Set Up time for a start or a repeated
start condition
4.7
t_HD:DAT Data Hold Time
f_SCL = 100 kHz
0
t_SU:DAT Data Set Up Time
250
t_SU:STO Set Up Time for STOP Condition,
4.0
t_r
SCL & SDA Rise Time
t_f
SCL & SDA Fall Time
C_b
Capacitive load for bus
SWITCHING CHARACTERISTICS (⁽²⁾)
Serializer M/S = 0 – R/W Register
0x05 = 0x40'h
100
f_SCL
SCL Clock Frequency
Deserializer M/S = 0 – READ
Register 0x06 b[6:4] = 0x00'h
100
f_LOW
SCL Low Period
Serializer M/S = 0 – R/W Register
0x05 = 0x40'h
4.7
Deserializer M/S = 0 – READ
Register 0x06 b[6:4] = 0x00'h
f_HIGH
SCL High Period
Serializer M/S = 0 – R/W Register
0x05 = 0x40'h
4.0
Deserializer M/S = 0 – READ
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
t_SU:STA
Set Up time for a start or a repeated
start condition
Serializer M/S = 0 Register 0x05 =
0x40'h
4.7
t_HD:DAT Data Hold Time
0
t_SU:DAT Data Set Up Time
250
t_SU:STO Set Up Time for STOP Condition
Serializer M/S = 0
4.0
t_f
SCL & SDA Fall Time
t_BUF
Bus free time between a stop and start Serializer M/S = 0
condition
4.7
Serializer M/S = 1
1
t_TIMEOUT NACK Time out
Deserializer MODE = 1
Register 0x06 b[2:0]=111'b
25
(1) Recommended Input Timing Requirements are input specifications and not tested in production.
(2) Specification is guaranteed by design and is not tested in production.
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Max
Units
100
kHz
µs
µs
µs
µs
3.45
µs
ns
µs
1000
ns
300
ns
400
pF
kHz
μs
μs
μs
μs
3.45
μs
ns
μs
300
ns
μs
ms
12
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