DS92LX2121_14 Datasheet, PDF (12/43 Pages) Texas Instruments – 10 - 50 MHz DC-Balanced Channel Link III Bi-Directional Control Serializer and Deserializer

DS92LX2121, DS92LX2122
SNLS330J – MAY 2010 – REVISED JANUARY 2014
Bi-Directional Control Bus AC Timing Specifications (SCL, SDA) - I²C Compliant
(Figure 5) (continued)
Over recommended operating supply and temperature ranges unless otherwise specified.
Symbol
Parameter
Conditions
Min
Typ
SWITCHING CHARACTERISTICS ()
f_SCL
SCL Clock Frequency
Serializer MODE = 0 – R/W Register
0x05 = 0x40'h
100
Deserializer MODE = 0 – READ
Register 0x06 b[6:4] = 0x00'h
100
t_LOW
SCL Low Period
Serializer MODE = 0 – R/W Register
0x05 = 0x40'h
4.7
Deserializer MODE = 0 – READ
Register 0x06 b[6:4] = 0x00'h
t_HIGH
SCL High Period
Serializer MODE = 0 – R/W Register
0x05 = 0x40'h
4.0
Deserializer MODE = 0 – READ
Register 0x06 b[6:4] = 0x00'h
t_HD:STA
Hold time for a start or a repeated start Serializer MODE = 0 Register 0x05
condition
= 0x40'h
4.0
tSU:STA
Set Up time for a start or a repeated
start condition
Serializer MODE = 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
condition
Serializer M/S = 0
4.7
Serializer
1
t_TIMEOUT NACK Time out
Deserializer
25
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Max
Units
kHz
μs
μs
μs
μs
3.45
μs
μs
μs
300
μs
µs
ms
SDA
t_f
SCL
t_LOW
t_r
START
t_HD;STA
t_HD;DAT
t_f
t_HIGH
t_HD;STA
t_SP
t_BUF
t_r
t_SU;DAT
t_SU;STA
REPEATED
START
t_SU;STO
STOP START
Figure 5. Serial Control Bus Timing
Bi-Directional Control Bus DC Characteristics (SCL, SDA) - I²C Compliant
Symbol
Parameter
Conditions
Min
Typ
V_IH
Input High Level
SDA and SCL
0.7 x
V_DDIO
V_IL
Input Low Level Voltage
SDA and SCL
GND
V_HY
Input Hysteresis
>50
I_OZ
TRI-STATE Output Current PDB = 0V VOUT = 0V or VDD
-20
±1
I_IN
Input Current
SDA or SCL, Vin = V_DDIO or GND
-20
±1
C_IN
Input Pin Capacitance
<5
Max
V_DDIO
0.3 x
V_DDIO
+20
+20
Units
V
V
mV
µA
µA
pF
12
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