Manual

DS3170 DS3/E3 Single-Chip Transceiver
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Table 17-3. Misc Timing
(V
DD
= 3.3V ±5%, T
j
= -40°C to +125°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Asynchronous Input High, Low Time t1-t2, t2 (Note 1) 500 ns
Asynchronous Input Rise, Fall Time t3 (Note 1) 10 ns
Note 1:
TMEI (GPIO), PMU (GPIO), 8KREFI (GPIO) and RST inputs
.
17.2 Overhead Port AC Characteristics
All AC timing characteristics are specified with a 25 pF capacitive load on all output pins, V
IH
= 2.4V and V
IL
= 0.8.
The voltage threshold for all timing measurements is VDD/2. The generic timing definitions shown in Figure 17-1
,
Figure 17-2
, Figure 17-3, and Figure 17-4 apply to this interface.
Table 17-4. Overhead Port Timing
(V
DD
= 3.3V ±5%, T
j
= -40°C to +125°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
CLK Period t1 (Note 1) 500 ns
CLK Clock High and Low Time t1-t2, t2 (Note 1) 200 ns
DIN to CLK Setup Time t5 (Note 2) 20 ns
CLK to DIN Hold Time t6 (Note 2) 20 ns
CLK to DOUT Delay t7 (Note 3) -20 20 ns
Note 1:
TOHCLK, ROHCLK output clocks.
Note 2:
TOHCLK clock falling edge outputs to TOH, TOHEN inputs.
Note 3:
TOHCLK, ROHCLK clock falling edge outputs to TOHSOF, ROH, ROHSOF outputs.