Datasheet

DS26521 Single T1/E1/J1 Transceiver
245 of 258
Table 12-4. Transmit AC Characteristics
(V
DD
= 3.3V ±5%, T
A
= -40°C to +85°C.) (Note 1) (See Figure 12-9, Figure 12-10, and Figure 12-11.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
(Note 2) 648
TCLK Period t
CP
(Note 3) 488
ns
t
CH
125
TCLK Pulse Width
t
CL
125
ns
(Note 4) 60 648
TSYSCLK Period t
SP
(Note 5) 60 448
ns
t
SH
30
TSYSCLK Pulse Width
t
SL
30
ns
TSYNC or TSSYNCIO Setup to TCLK
or TSYSCLK falling
t
SU
20
t
CH
- 5
or
t
SH
- 5
ns
TSYNC or TSSYNCIO Pulse Width t
PW
(Note 6) 50 ns
488
244
122
TSSYNCIO Pulse Width (Notes 7, 8) t
PW
61
ns
TSER, TSIG Setup to TCLK,
TSYSCLK Falling
t
SU
20 ns
TSER, TSIG Hold from TCLK,
TSYSCLK Falling
t
HD
20 ns
Delay TCLK to TCHBLK, TCHCLK,
TSYNC
t
D2
50 ns
Delay TSYSCLK to TCHCLK, TCHBLK t
D3
50 ns
Delay TCLK to TTIP/TRING t
D4
50 ns
Delay BPCLK to TSSYNCIO (Note 7) t
D5
5 ns
Note 1: The timing parameters in this table are guaranteed by design (GBD).
Note 2: T1 Mode.
Note 3: E1 Mode.
Note 4: RSYSCLK = 1.544MHz.
Note 5: RSYSCLK = 2.048MHz.
Note 6: TSSYNCIO configured as an input (
GTCR2.1 = 0).
Note 7: TSSYNCIO configured as an output (
GTCR2.1 = 1).
Note 8: Varies depending on the frequency of BPCLK.