MSC8157ETVT1000A Freescale Semiconductor, MSC8157ETVT1000A Datasheet - Page 76

• Manufacturer Part Number: MSC8157ETVT1000A
• Description: Digital Signal Processors & Controllers - DSP, DSC Qual 8157 EN FG 1GHz -45 to 105c
• Manufacturer: Freescale Semiconductor

Specifications of MSC8157ETVT1000A

• Rohs: yes
• Core: SC3850
• Data Bus Width: 32 bit
• Program Memory Size: 32 KB
• Data Ram Size: 512 KB
• Number Of Programmable I/os: 32
• Number Of Timers: 2
• Operating Supply Voltage: 0.97 V to 1.05 V
• Maximum Operating Temperature: + 105 C
• Package / Case: FCPBGA-783
• Mounting Style: SMD/SMT

Electrical Characteristics
transmitter specifications are defined in
specified at the component pins. the AC timing specifications do not include REF_CLK jitter.
76
At recommended operating conditions (see
Unit interval
Tx eye width
Time between the jitter
median and maximum
deviation from the median.
AC coupling capacitor
Notes:
Parameter
Table 33. PCI Express 2.0 (2.5 Gbps) Differential Transmitter (Tx) Output AC Specifications
1.
2.
3.
4.
No test load is necessarily associated with this value.
Specified at the measurement point into a timing and voltage test load as shown in
consecutive Tx UIs.
A T
transmitter collected over any 250 consecutive Tx UIs. The T
jitter budget collected over any 250 consecutive Tx UIs. It should be noted that the median is not the same as the mean. The
jitter median describes the point in time where the number of jitter points on either side is approximately equal as opposed to
the averaged time value.
The DSP device SerDes transmitter does not have a built-in C
TX-EYE
= 0.75 UI provides for a total sum of deterministic and random jitter budget of T
T
TX-EYE-MEDIAN-
to-MAX-JITTER
MSC8157 Six-Core Digital Signal Processor Data Sheet, Rev. 1
Symbol
T
TX-EYE
C
UI
TX
Table
Table 35
4).
399.88 400.00 400.12
0.75
Min
75
—
and the receiver specifications are defined in
Nom
—
—
—
0.125
Max
200
—
TX-EYE-MEDIAN-to-MAX-JITTER
TX
. An external AC coupling capacitor is required.
Units
nF
ps
UI
UI
Each UI is 400 ps ± 300 ppm. UI does not
account for spread spectrum clock dictated
variations. See note 1.
The maximum transmitter jitter can be
derived as T
0.25 UI. This does not include spread
spectrum or REF_CLK jitter. It includes
device random jitter at 10
and 3.
Jitter is defined as the measurement
variation of the crossing points (V
0 V) in relation to a recovered Tx UI. A
recovered Tx UI is calculated over 3500
consecutive unit intervals of sample data.
Jitter is measured using all edges of the 250
consecutive UI in the center of the 3500 UI
used for calculating the Tx UI. See notes 2
and 3.
All transmitters must be AC coupled. The AC
coupling is required either within the media
or within the transmitting component itself.
See note 4.
Figure 15
median is less than half of the total Tx
TX-NAX-JITTER
TX-MAX-JITTER
Table
and measured over any 250
Comments
36. The parameters are
Freescale Semiconductor
= 0.25 UI for the
–12
= 1 – T
. See notes 2
TX-DIFFp-p
TX-EYE
=
=