Rainbow Electronics MAX3301E - Manual (Page 6)

MAX3301E
USB On-the-Go Transceiver and Charge Pump
6 _______________________________________________________________________________________
I 2 C-/SMBus™- COMPATIBLE TIMING SPECIFICATIONS
(V CC = +3V to +4.5V, V L = +1.65V to +3.6V, C FLYING = 100nF, C VBUS = 1µF, ESR CVBUS = 0.1 Ω (max), T
A = T MIN to T MAX , unless
otherwise noted. Typical values are at V CC = +3.7V, V L = +2.5V, T A = +25°C.) (Note 2)
PARAMETER SYM B O L CONDITIONS MIN TYP MAX UNITS
Serial Clock Frequency f SCL 400 kHz
Bus-Free Time Between Stop and
Start Conditions
t BUF 1.3 µs
Start-Condition Hold Time t HD_STA 0.6 µs
Stop-Condition Setup Time t SU_STO 0.6 µs
Clock Low Period t LOW 1.3 µs
Clock High Period t HIGH 0.6 µs
Data Setup Time t SU_DAT 100 ns
Data Hold Time t HD_DAT (Note 4) 0.9 µs
Rise Time of SDA and SCL t R (Note 5)
20 +
0.1 x
C B
300 ns
Fall Time of SDA and SCL t F Measured from 0.3 x V L to 0.7 x V L (Note 5) 300 ns
Capacitive Load for each Bus
Line
C B 400 pF
SDA AND SCL I/O STAGE CHARACTERISTICS
Input-Voltage Low V IL
0.3 x
V L
V
Input-Voltage High V IH
0.7 x
V L
V
SDA Output-Voltage Low V OL I SINK = 3mA 0.4 V
Pulse Width of Suppressed Spike t SP (Note 6) 50 ns
Note 2: Parameters are 100% production tested at +25 °C. Limits over temperature are guaranteed by design.
Note 3: Guaranteed by bench characterization. Limits are not production tested.
Note 4: A master device must provide a hold time of at least 300ns for the SDA signal to bridge the undefined region of SCL’s falling
edge.
Note 5: C B is the total capacitance of one bus line in pF, tested with C B = 400pF.
Note 6: Input filters on SDA, SCL, and ADD suppress noise spikes of less than 50ns.
SMBus™ is a trademark of Intel Corporation.