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DS3170 DS3/E3 Single-Chip Transceiver
216 of 230
Table 16-3. Misc Timing
(VDD = 3.3V ±5%, Tj = -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.
16.2 Overhead Port AC Characteristics
All AC timing characteristics are specified with a 25 pF capacitive load on all output pins, VIH = 2.4V and VIL = 0.8.
The voltage threshold for all timing measurements is VDD/2. The generic timing definitions shown in
Figure 16-1,Table 16-4. Overhead Port Timing
(VDD = 3.3V ±5%, Tj = -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.