ZL50015GAC ZARLINK [Zarlink Semiconductor Inc], ZL50015GAC Datasheet - Page 45
ZL50015GAC
Manufacturer Part Number
ZL50015GAC
Description
Enhanced 1 K Digital Switch with Stratum 4E DPLL
Manufacturer
ZARLINK [Zarlink Semiconductor Inc]
Datasheet
1.ZL50015GAC.pdf
(122 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ZL50015GAC
Manufacturer:
ZARLINK
Quantity:
37
- Current page: 45 of 122
- Download datasheet (917Kb)
15.5
Values for short phase deviations (upper and lower limit) are programmable through registers. The unit of the binary
values of these numbers is 100 MHz clock period (10 ns). Single period deviation limits are more relaxed than multi
period limits, and are used for early detection of the reference loss, or huge phase jumps.
The values for the upper and lower limits are shown in the following table:
15.6
To monitor reference failure based on frequency offset, multi period checking is performed. Reference validation
time is prescribed by Telcordia GR-1244-CORE and is between 10 and 30 seconds. To meet the criteria for
reference validation time, the time base for multi period monitoring has to be big enough. To implement hysteresis,
the upper limits are split into near upper and far upper limits and the lower limits are split into near lower and far
lower limits. The reference failure is detectable only when the reference passes far limits, but passing is not
detected until the reference is within near limits. The zone between near and far limits, called the “grey zone”, is
required by standards and prevents unnecessary reference switching when the selected reference is close to the
boundary of failure.
The monitor makes a decision about reference validity after two consecutive measurements with respect to its time
base. The time base for multi-period monitoring is 10 seconds. The time base is defined in the number of reference
clock cycles.
The device has two sets of limits the Stratum 4E default limits and the Relaxed Stratum 4E limits (see Table 12 on
page 45). The ST4_LIM bit in Table 26, DPLL Control Register (DPLLCR) Bits is used to select between the two
sets of limits.
Single Period Reference Monitoring
Multiple Period Reference Monitoring
Far Upper Limit
Near Upper Limit
Nominal Value
Near Lower Limit
Far Lower Limit
Table 11 - Values for Single Period Limits
8 kHz
1.544 MHz
2.048 MHz
4.096 MHz
8.192 MHz
16.384 MHz
19.44 MHz
Table 12 - Multi-Period Hysteresis Limits
Frequency
Reference
Stratum 4E Default Limits
(in 10 ns units)
-82.487 ppm
-64.713 ppm
64.713 ppm
82.487 ppm
Zarlink Semiconductor Inc.
ZL50015
45
Comment
0.3 UIp-p
0.2 UIp-p
0.2 UIp-p
0.2 UIp-p
0.2 UIp-p
0.2 UIp-p
10 UIp-p
0 ppm
Relaxed Stratum 4E Limits
(in 10 ns units)
-250 ppm
-240 ppm
240 ppm
250 ppm
Data Sheet
Related parts for ZL50015GAC
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Enhanced 1 K Digital Switch with Stratum 4E DPLL
Manufacturer:
ZARLINK [Zarlink Semiconductor Inc]
Datasheet:
Part Number:
Description:
Zarlink Semiconductor Inc [TV IF PREAMPLIFIER]
Manufacturer:
Zarlink Semiconductor
Datasheet:
Part Number:
Description:
Satellite Channel Decoder
Manufacturer:
ZARLINK [Zarlink Semiconductor Inc]
Datasheet:
Part Number:
Description:
Power Factor Controller
Manufacturer:
ZARLINK [Zarlink Semiconductor Inc]
Datasheet:
Part Number:
Description:
CMOS/SNOS NVSRAM HIGH PERFORMANCE 8 K x 8 NON-VOLATILE STATIC RAM
Manufacturer:
ZARLINK [Zarlink Semiconductor Inc]
Datasheet:
Part Number:
Description:
Dual stage IF amplifier for cable tuners
Manufacturer:
ZARLINK [Zarlink Semiconductor Inc]
Datasheet:
Part Number:
Description:
Synthesized Broadband Converter with Programmable Power
Manufacturer:
ZARLINK [Zarlink Semiconductor Inc]
Datasheet:
Part Number:
Description:
Cable Tuner Front End LNA with AGC
Manufacturer:
ZARLINK [Zarlink Semiconductor Inc]
Datasheet:
Part Number:
Description:
Front End Power Splitter with AGC
Manufacturer:
ZARLINK [Zarlink Semiconductor Inc]
Datasheet:
Part Number:
Description:
1.3GHz Dual Wideband Logarithmic Amplifier
Manufacturer:
ZARLINK [Zarlink Semiconductor Inc]
Datasheet:
Part Number:
Description:
Wide Dynamic Range Image Reject MOPLL
Manufacturer:
ZARLINK [Zarlink Semiconductor Inc]
Datasheet:
Part Number:
Description:
WIDEBAND PLL FM DETECTOR FOR SATELLITE TV
Manufacturer:
ZARLINK [Zarlink Semiconductor Inc]
Datasheet:
Part Number:
Description:
WIDEBAND LINEAR FM DETECTOR FOR SATELLITE TV
Manufacturer:
ZARLINK [Zarlink Semiconductor Inc]
Datasheet:
Part Number:
Description:
WIDEBAND LOG IF STRIP AMPLIFIER
Manufacturer:
ZARLINK [Zarlink Semiconductor Inc]
Datasheet:
Part Number:
Description:
WIDEBAND LOG IF STRIP AMPLIFIER
Manufacturer:
ZARLINK [Zarlink Semiconductor Inc]
Datasheet: