RM46L852
www.ti.com
SPNS185 –SEPTEMBER 2012
NOTE
• A device must internally provide a hold time of at least 300 ns for the SDA signal
(referred to the VIHmin of the SCL signal) to bridge the undefined region of the falling
edge of SCL.
• The maximum t
h(SDA-SCLL)
has only to be met if the device does not stretch the LOW
period (t
w(SCLL)
) of the SCL signal.
• A Fast-mode I2C-bus device can be used in a Standard-mode I2C-bus system, but the
requirement t
su(SDA-SCLH)
≥ 250 ns must then be met. This will automatically be the case if
the device does not stretch the LOW period of the SCL signal. If such a device does
stretch the LOW period of the SCL signal, it must output the next data bit to the SDA line
tr max + t
su(SDA-SCLH)
.
• C
b
= total capacitance of one bus line in pF. If mixed with fast-mode devices, faster fall-
times are allowed.
Copyright © 2012, Texas Instruments Incorporated Peripheral Information and Electrical Specifications 147
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