The M21260 is part of a family of low-power, high-perform-
ance video devices for broadcast and professional video
applications. In addition to the 4x4 crosspoint with inde-
pendent quad channel video reclockers, other video
products include:
- M21250, M21251, M21252 quad channel reclockers
for SD, SD/HD, and SD/HD/2xHD data rates
- M21261 1:4 1.6 Gbps video fanout with SD/HD
multi-rate reclocking
- M21262 4:1 1.6 Gbps video selector with SD/HD
multi-rate reclocker
The M21260 provides all of the features and benefits of
the M21251 quad channel SD/HD reclocker and incorporates
a fully non-blocking 4x4 asynchronous crosspoint switch
before the reclocker stages.
Reduced power dissipation with improved jitter generation,
tolerance, and transfer enable robust system design at
reduced cost and simplified thermal management. System
and chip level BIST functionality enables improved manufac-
turing (JTAG) and system level troubleshooting and diagnostics
(test pattern generators – PRBS, 8b/10b)
M21260
>
4x4 1.6 Gbps Crosspoint with Quad Channel Multi-rate Video
Reclockers for SD/HD (42 Mbps to 1.6 Gbps) Applications
>Integrated 4x4 crosspoint
switch for data rates to 1.6
Gbps with a fully non-blocking
architecture and broadcast /
multicast functionality
>Fully independent, quad channel
multi-rate video reclockers,
SMPTE and DVB-ASI compliant
- Hardwired control mode:
143, 177, 270, 360, 540,
1483.5/1485 Mbps
- Software control mode:
42 Mbps – 1.6 Gbps
- Bypass mode: 0 – 1.6 Gbps
>Integrated signal conditioning
for improved signal integrity
with inexpensive PCB materials
or longer PCB trace lengths.
>Very low power dissipation and
flexible power supply support
for reduced power supply and
thermal management costs
>Superior jitter generation
(5mUI typical) and improved
jitter tolerance in the high
frequency band
>Integrated loop filter compo-
nents and I/O termination
resistors for simplified PCB
designs and reduced cost
>Flexible I/O interfacing to CML,
LVDS, and LVPECL with per
channel output amplitude control
>Serial SPI 4 wire interface or
hardwired interface control
>BIST features for PCB and
system testing with fully
independent transmitter
and receiver
- PRBS: 2
7
–1,2
15
–1,
2
23
–1,2
31
–1
- 8b/10b: CJTPAT, CRPAT,
countdown
>PCB layout friendly with “pass
through” I/O and high speed
output polarity inversion
>KEY FEATURES
Input
Equalizer
Pre-Emphasis
PRBS 2^23-1
1.6 Gbps
Input Signal
after 60”
FR4 Trace
PRBS 2^23-1
1.6 Gbps
Output Signal
after 60”
FR4 Trace
Input Equalizer OFF
Pre-Emphasis OFF
Input Equalizer ON
Pre-Emphasis ON
www.mindspeed.com/salesoffices
General Information: (949) 579-3000
Headquarters – Newport Beach
4000 MacArthur Blvd., East Tower
Newport Beach, CA 92660-3007
21260-BRF-001-B M03-0889
© 2003 Mindspeed Technologies™. All rights reserved. Mindspeed and the Mindspeed
logo are trademarks of Mindspeed Technologies. All other trademarks are the prop-
erty of their respective owners. Although Mindspeed Technologies strives for accu-
racy in all its publications, this material may contain errors or omissions and is
subject to change without notice. This material is provided as is and without any
express or implied warranties, including merchantability, fitness for a particular
purpose and non-infringement. Mindspeed Technologies shall not be liable for any
special, indirect, incidental or consequential damages as a result of its use.
Applications
• µSerial routing switchers
• Programmable n:4 distribution amplifiers
• Programmable patch panels
Additional Features
• Fully SMPTE 259, SMPTE 292,
and SMPTE 344 compliant
• Inexpensive, multi vendor stocked 12MHz
reference clock
• Reclocker BYPASS operation
• User selectable independent clock outputs
• JTAG external boundary scan for high speed
and digital I/O circuitry
• Temperature monitor
• Loss of lock indication
Ordering Information
• M21260-12P: 4x4 1.6 Gbps crosspoint switch with
quad channel SD/HD reclockers (42 Mbps – 1.6 Gbps)
• M21260G-12P: 4x4 1.6 Gbps crosspoint switch
with quad HD/SD reclockers (42 Mbps – 1.6 Gbps)
[RoHS compliant package]
Package: 72 terminal, 10x10mm MLF
72 terminal, 10x10mm MLF
[RoHS compliant package]
Product Features
Advanced third generation signal conditioning functionality such
as Input Equalization, output pre-emphasis, integrated I/O termi-
nations, and PCB layout friendly features facilitate quick PCB turn
times while helping to maintain signal integrity.
A built in frequency synthesizer, allows multi-rate operation from
a single reference clock. The device can be controlled through
hardwired pins or a SPI compatible 4 wire serial interface.
The hardwired mode simplifies the overall design, while allowing
control of key features while the SPI interface with an external
microcontroller enables complete control of the device functions.
4 x 4
XPT
Core
M21260
M21218
Cable
Equalizers
HD-SDI
or
SD-SDI
Cable
Drivers
- Improved performance
- Reduced footprint and component count
- Reduced power dissipation
8 SMPTE
outputs
or
4 DVB - ASI
outputs
Each channel is
reclocked resulting in
improved signal integrity
Relockers Data Buffers
M21214
M21214
M21214
M21214
2
2
2
2
2
0
1
2
3
0
1
2
3
2
2
RCLK 0
RCLK 1
RCLK 2
RCLK 3
2
2
2
2
2
SD/HD 4x4 Serial Routing Switcher
