CAT5136 Datasheet, PDF (4/11 Pages) ON Semiconductor – Digital Potentiometers (POTs) with 128 Taps and I2C Interface

CAT5136, CAT5137, CAT5138
Table 6. A.C. CHARACTERISTICS
Parameter (see Figure 6)
Symbol
Min
Typ
Max
Clock Frequency
F_SCL
400
Noise Suppression Time Constant at SCL & SDA Inputs
T_I (Note 9)
50
SCL Low to SDA Data Out and ACK Out
t_AA
1
Time the bus must be free before a new transmission can start
t_BUF (Note 9)
1.2
Start Condition Hold Time
t_HD:STA
0.6
Clock Low Period
t_LOW
1.2
Clock High Period
t_HIGH
0.6
Start Condition Setup Time (for a Repeated Start Condition)
t_SU:STA
0.6
Data In Setup Time
t_SU:DAT
100
Data in Hold Time
t_HD:DAT
0
SDA and SCL Rise Time
t_R (Note 9)
0.3
SDA and SCL Fall Time
t_F (Note 9)
300
Stop Conditions Setup Time
t_SU:STO
0.6
Data Out Hold Time
t_DH
100
9. This parameter is tested initially and after a design or process change that affects the parameter.
Table 7. CAPACITANCE (T_A = 25C, f = 1.0 MHz, V_DD = 5.0 V)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Input/Output Capacitance (SDA, SDC)
C_I/O
V_I/O = 0 V (Note 10)
10
10. This parameter is tested initially and after a design or process change that affects the parameter.
Table 8. POWER-UP TIMING (Notes 11, 12)
Symbol
Parameter
Min
Max
t_PUR
Power-up to Read Operation
1
t_PUW
Power-up to Write Operation
1
11. This parameter is tested initially and after a design or process change that affects the parameter.
12. t_PUR and t_PUW are the delays required from the time V_DD is stable until the specified operation can be initiated.
Table 9. WIPER TIMING
Symbol
Parameter
t_WRPO
t_WRL
Wiper Response Time After Power Supply Stable
Wiper Response Time After Instruction Issued
Min
Max
5
10
5
10
Units
kHz
ns
ms
ms
ms
ms
ms
ms
ns
ms
ms
ns
ms
ns
Unit
pF
Units
ms
ms
Units
ms
ms
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