PM7312 pmc-sierra, PM7312 Datasheet - Page 272

• Manufacturer Part Number: PM7312
• Description: Freedm 32a1024l Assp Telecom Standard Datasheet
• Manufacturer: pmc-sierra

Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC-2021833, Issue 2
19
19.1 SBI Bus Interface Timing
A.C. Timing Characteristics
Notes on Input Timing:
1. When a set-up time is specified between an input and a clock, the set-up time is the time in
2. When a hold time is specified between an input and a clock, the hold time is the time in
Notes on Output Timing:
1. Output propagation delay time is the time in nanoseconds from the 1.4 Volt point of the
2. Loads used to measure maximum output propagation delays are specified with each table.
3. 0pF load is used to measure minimum output propagation delays.
Output tristate delay is the time in nanoseconds from the 1.4 Volt point of the reference signal to the
point where the total current delivered through the output is less than or equal to the leakage current
transfer.
Table 53 REFCLK Timing
Symbol
f CLK
D CLK
Figure 59 SBI336 Drop Bus Input Interface Timing
nanoseconds from the 1.4 Volt point of the input to the 1.4 Volt point of the clock.
nanoseconds from the 1.4 Volt point of the clock to the 1.4 Volt point of the input.
reference signal to the 1.4 Volt point of the output.
Description
Frequency, REFCLK =77.76MHz (SBI336)
OR
Frequency, REFCLK =19.44MHz (SBI)
Duty Cycle, REFCLK
D D A T A [7 :0 ]
R E F C L K
D C 1 F P
D D P
D P L
D V 5
FREEDM 32A1024L ASSP Telecom Standard Product Data Sheet
tS D D P
tS D D A T A
tS C 1 F P
tS D P L
tS D V 5
tH D D P
tH D D A T A
tH C 1 F P
tH D P L
tH D V 5
Min
-20
-50
40
Max
+20
+50
60
Units
ppm
ppm
%
Released
272