Overhead port ac characteristics, Verhead, Ac c – Rainbow Electronics DS3170 User Manual
Page 221: Haracteristics, Table 17-3. misc timing, Table 17-4. overhead port timing, 2 overhead port ac characteristics
DS3170 DS3/E3 Single-Chip Transceiver
221 of 233
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
, and
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.