M21215 Datasheet, PDF (1/24 Pages) M/A-COM Technology Solutions, Inc. – SMPTE Coaxial Cable Interface

M21215 (HD/SD-SDI) Auto-rate Reclocker w/4:1 Selector
The M21215 is a high-speed, low-power reclocker designed to remove both random and inter-symbol interference
(ISI) jitter from the input data for SMPTE and DVB-ASI serial digital video applications. Mindspeed's high-
performance reclocker offers significant power reduction compared to legacy reclocking solutions.
The M21215 is based on a custom and proprietary reclocker core. The high-performance reclocker design results in
high-jitter tolerance, especially in the presence of duty-cycle-distortion (DCD) that typically arises with AC coupling
and video pathological test patterns. The M21215 also offers improved auto rate detect acquisition times over
legacy reclocker solutions.
The M21215 supports SMPTE HD/SD-SDI data rates from 143 Mbps to 1485 Mbps. The M21215 is functionally
and pin-for-pin compatible to the GS1535 for a true drop-in replacement but also provides a number of added
benefits for new designs such as 2.5V operation, reduced output swing, additional loop bandwidth control, Auto
Rate Detect optimization, and output common mode shifting for DC coupling to downstream LVPECL receivers.
Applications
Features
• Serial Routing Switchers
• Distribution Amplifiers
• SMPTE Coaxial Cable Interface
• Studio video applications
• Broadcast video applications
• Distribution video applications
Standards Compliance
• SMPTE 259M, 292M, 344M and DVB-ASI
• SD/HD operation: 143, 177, 270, 360, 540, 1483.5, 1485 Mbps and
DVB-ASI at 270 Mbps
• Auto and manual rate selection modes with rate indication in Auto
• 4:1 Input MUX and Loss of Lock (LOL) indicator
• Input buffers are compatible with PCML, LVDS, or LVPECL voltage
levels
• Differential I/O with on chip termination resistors
• Selectable auto MUTE or BYPASS with manual BYPASS option
• Pin to pin compatible with GS1535
• Low typical power dissipation (325 mW @ 2.5V, 430 mW @ 3.3V)
• 2.5V, or 3.3V power supply operation with GS1535 compatible
operation at 3.3V
• Extended temperature operation: -10°C to +85°C
Functional Block Diagram
XTL_IN
XTL_IN
IN_SEL[1:0]
DDI0/DDI0
DDI1/DDI1
DDI2/DDI2
DDI3/DDI3
XTAL
Oscillator
2
VDDI_TERM[3:0]
4
XTAL
Buffer
Bypass/Mute
Logic
Multi-Rate Reclocker Core
Phase/Frequency
Detector
Charge Pump
Loop Filter
VCO
Control Logic
Output
Buffer
3
SWING/RSVD
DDO
DDO
LVPECL/RSVD
VDDO_TERM
RATE[2:0]
LOL
SD/HD
Note: Signal names in red indicate additional functions mapped to pins that are RSVD on the GS1535.
21215-DSH-001-F
Mindspeed Technologies^®
Mindspeed Proprietary and Confidential
June 2006