2.0 Functional Description
CX28331/CX28332/CX28333
2.9 AC Characteristics
Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit
2.9 AC Characteristics
Table 2-6. AC Characteristics (Logic Timing)
Parameter
Conditions
Min
Nom
Max
Unit
Tosym, Tisym
RCLK and TCLK
E3
DS-3
STS-1
—
29.10
22.35
19.29
—
ns
ns
ns
Clock Duty Cycle
Towidth/Tosym, RCLK
Tiwidth/Tisym, TCLK
Tiwidth/Tisym, REFCLK
45
40
40
—
55
60
60
%
%
%
Todelay
Tisetup
—
—
—
—
3
ns
ns
TPOS/TNRZ, TNEG,
TAIS
4
—
Tihold
TPOS/TNRZ, TNEG,
TAIS
0
—
—
ns
NOTE(S):
1. The description applies to the DS3, E3, and STS-1 clock rates and other parameters such
as pulse width, set-up time, hold time, and duty cycle.
2. The timing diagram, illustrated in Figure 2-12, describes the logical relationship between
various clock and data signals, and parameter values.
2-22
Conexant
100985A
CONEXANT [ CONEXANT SYSTEMS, INC ]
