Datasheet

DS2148/DS21Q48
69 of 73
Table 10-5. AC Characteristics—Transmit Side
(V
DD
= 5.0V ±5%, T
A
= -40°C to +85°C.) (See Figure 10-10.)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
488 ns 1
TCLK Period t
CP
648 ns 2
t
CH
75 ns
TCLK Pulse Width
t
CL
75 ns
TPOS/TNEG Setup to TCLK
Falling or Rising
t
SU
20 ns
TPOS/TNEG Hold From TCLK
Falling or Rising
t
HD
20 ns
TCLK Rise and Fall Times t
R
, t
F
25 ns
NOTES:
1) E1 Mode.
2) T1 or J1 Mode.
Figure 10-10. Transmit Side Timing
t
F
t
R
TPOS, TNEG
t
CL
t
CH
CP
t
HD
t
SU
TCLK
1
t
TCLK
2
NOTE 1: TCES = 0 (CCR2.1) OR CES = 0.
NOTE 2: TCES = 1 (CCR2.1) OR CES = 1.