• Integrated regulators for multi-voltage operation (1.2 V - 3.3 V)
• Electrically independent input, output, and core supply rails
• Output enable/disable and configurable auto or manual bypass mode
• Automatic and manual modes for rate indication and selection
• Loss of Lock (LOL), Loss of Signal (LOS) and data rate Indication
• Two-wire and four-wire serial interface programmability
• Industrial operating temperature range (-40 °C to +85 °C)
• Optional recovered serial clock output
Rev V6
Features
• SMPTE 259-C, 292, 424M, and DVB ASI Compliant
• Greater than 0.6 UI Input Jitter Tolerance
• Integrated 50
input termination
• Input equalization and output de-emphasis for 40" of FR4 trace
The M21245 is a serial digital video reclocker with integrated trace equalization and automatic rate detect (ARD) circuitry. It operates at
SDI data rates ranging from 270 Mbps to 2970 Mbps and is compliant to SMPTE 424M, SMPTE 292, and SMPTE 259M-C. At
270 Mbps it also supports DVB-ASI.
The M21245 has an input jitter tolerance (IJT) of greater than 0.6 unit intervals (UI) and can provide retimed serial outputs with very low
output jitter. The reclocker requires a single external 27 MHz crystal, which is used as the reference clock for all four channels. It
includes per-lane analog input equalization for up to 40" of FR4 trace and two connectors in addition to output de-emphasis.
This device features integrated supply regulators allowing it to be powered from 1.2 V, 1.8 V, 2.5 V, or 3.3 V supply voltages. When
operating at 1.2 V, it consumes only 230 mW at 3G-SDI. Furthermore, the power rails for the core, input, and output circuitry are
electrically independent and as such may be connected to different voltage rails on the board. This feature allows the M21245 to be
DC-coupled to any upstream or downstream device regardless of its input/output voltage level.
The device may be configured by setting the internal registers though standard two-wire and four-wire interfaces.
The M21245 is offered in a green and RoHS compliant, 6 mm x 6 mm, 40-pin QFN package.
M21245 Block Diagram
SDI0P
SDI0N
SDI1P
SDI1N
SDI2P
SDI2N
SDI3P
SDI3N
IE
IE
IE
IE
50Ω Buffer
W/ DE
4:1
Mux
SDOAP
SDOAN
Reclocker
50Ω Buffer
W/ DE
SDOB/SCLKOP
SDOB/SCLKON
1
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice.
Visit www.macom.com for additional data sheets and product information.
For further information and support please visit:
http://www.macom.com/support
M21245-15
3G/HD/SD-SDI Multi-rate Reclocker
Rev V6
Ordering Information
Part Number
M21245G-15*
Package
6x6 mm, 40-pin QFN package
Operating Temperature
-40
°C
to 85
°C
* The letter “G” designator after the part number indicates that the device is RoHS compliant. The RoHS compliant devices are backwards compatible with 225
°C
reflow profiles.
Revision History
Revision
V6
Level
Released
Date
December 2015
Updated package drawing,
Figure 3-12.
Package effective as of July 2014.
Added package dimensions,
Figure 3-13.
Description
H (V5)
G (V4)
F (V3)
Released
Released
Released
July 2012
January 2012
January 2011
Section 4.6.2:
Revised four-wire interface description.
Table 1-8:
Added 2-state input to V
IH
and V
IL
.
Section 4.9:
Advised using a 10 k pull-up to DV
DDIO
when in “interrupt mode.”
In the previous revision of this device, M21245G-14, the Loss of Lock (LOL) alarm would be erroneously triggered
when pathological signals were used. As a workaround, MACOM recommended masking the faulty LOL alarm by
setting register 96h bit[6] to 1b. In the latest version, M21245G-15, the faulty algorithm has been corrected.
Therefore, the requirement to mask the LOL alarm has been removed from this data sheet. Please note that this
change has been made to be fully backwards compatible, so setting register 96h bit[6] to 1b, while unnecessary,
will not affect the function or performance of the device.
Ordering Information: Updated part number from -14 to 15.
Table 1-7:
Updated XTAL and reference clock electrical specifications, input Impedance typical from to 400 k to
200
i input amplitude range from 1.6 V-2.0 V to 0.8 V to 1.2 V and max rise/fall times from 1 ns max to 2 ns
typical and 6 ns max.
Table 1-8:
Updated V
OH
from 0.75 to 0.80 x DV
DDIO
and I
OL
from 24 mA to 3 mA.
Figure 3-1:
Updated the pinout diagram to reflect new pin naming convention.
Table 3-1:
Updated table to reflect new pin naming convention.
Figure 3-6:
Updated figure from pull-down to pull-up.
Table 5-1:
Updated register map table. Added all registers needed to perform EEPROM checksum.
Register 0Ah: Added this register to provide programmability to SDOB De-emphasis.
Register 0Eh: De-featured xAlarm status mode.
Register 0Eh: Modified Interrupt mode xAlarm pulse widths to reflect their true value with respect to a
10K
pull up resistor.
Register 82h: Updated chip version from 03h to 04h.
Figure 4-3:
Updated self bias diagram to reflect conditions necessary for self biased mode.
Section 4.6.2:
Updated to include the detailed timing description for four-wire interface when conducting a write
operation followed by a read operation.
Table 4-6:
Updated the EEPROM Addresses.
Table 4-7:
Updated the EEPROM Addresses.
Section 4.7.1:
Clock Recovery: Updated the data to clock delay to 60 ps.
Section 4.2:
Included conditions necessary for self biased mode.
Section 4.6.1:
Added note defeaturing xAlaram pin in hardware control mode.
Section 4.9:
De-featured xAlarm pin in hardware mode and limited xAlarm pin usage to Interrupt Mode only.
2
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice.
Visit www.macom.com for additional data sheets and product information.
For further information and support please visit:
http://www.macom.com/support
M21245-15
3G/HD/SD-SDI Multi-rate Reclocker
Rev V6
Revision History
Revision
E (V2)
Level
Released
Date
August 2010
Description
Status for floating logic state for pin MF4 changed from reclocker bypass to normal operation in
Table 3-1
and
Table 4-2.
Status for floating logic state for pin MF5 changed from reclocker bypass to normal operation in
Table 3-1
and
Table 4-2.
Changed MF4 and MF5 levels in
Table 3-1.
Added note to
Figure 4-3.
Changed MF4 and MF5 levels in
Table 4-2.
Changed MF3 function description in
Table 4-5.
Refer to D revision for details.
Refer to C revision for details.
Refer to B revision for details.
Initial release.
D (V1)
C (V1P)
B (V2A)
A (V1A)
Released
Preliminary
Advance
Advance
May 2010
April 2010
October 2009
September 2008
M21245 Marking Diagram
21245 G15
XXXX .X
YYWW COUNTRY
Part Number
Lot Number
Date and Country Code
3
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice.
Visit www.macom.com for additional data sheets and product information.
For further information and support please visit:
http://www.macom.com/support
M21245-15
3G/HD/SD-SDI Multi-rate Reclocker
Rev V6
1.0 Electrical Characteristics
Unless noted otherwise, specifications apply for typical recommended operating conditions shown in
Table 1-2,
with DV
DDO
= 1.2 V, AV
DDCORE
= 1.2 V, DV
DDCORE
= 1.2 V, AV
DDI
= 1.2 V, CML inputs/outputs at 800 mV
differential (R
LOAD
= 50
, and PRBS 2
10
– 1 test pattern at 2.97 Gbps.
Table 1-1.
Symbol
AV
DDI
AV
DDO
DV
DDIO
DV
DDCORE
AV
DDCORE
T
STORE
V
IN, CMOS
V
IN
V
ESD, HBM
V
ESD, CDM
LU
I
IN, PCML
Absolute Maximum Ratings
Parameter
Analog supply for input circuitry
Analog supply for output circuitry
Digital supply for input/output circuitry
Digital core positive supply
Analog core positive supply
Storage temperature
DC input voltage (CMOS)
DC input voltage (PCML)
Human Body Model (HBM)
Charge Device Model (CDM)
Latch up @ 85 °C
Maximum high-speed input current
Note
1, 3
1, 3
1, 3
1, 3
1, 3
1, 3
1, 3
1, 3
1, 2, 3
1, 2, 3
1, 3
1, 3
Minimum
-0.5
-0.5
-0.5
-0.5
-0.5
-65
-0.5
-0.5
-2
-500
-150
-100
Maximum
3.6
3.6
3.6
1.5
1.5
150
DV
DDIO
+0.5
AV
DDI
+0.5
2
500
150
100
Unit
V
V
V
V
V
°C
V
V
kV
V
mA
mA
NOTES:
1.
2.
3.
Exposure of the device beyond the minimum/maximum limits may cause permanent damage. Limits listed in the above table are stress limits only, and do not
imply functional operation within these limits.
HBM and CDM per JEDEC class 2 (JESD22-A114-B).
Limits listed in the above table are stress limits only and do not imply functional operation within these limits.
4
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice.
Visit www.macom.com for additional data sheets and product information.
For further information and support please visit:
http://www.macom.com/support
M21245-15
3G/HD/SD-SDI Multi-rate Reclocker
Rev V6
Table 1-2.
Symbol
DV
DDIO
AV
DDI
AV
DDO
AV
DDCORE
DV
DDCORE
T
CASE
Recommended Operating Conditions
Parameter
Digital I/O positive supply
Analog input positive supply
Analog output positive supply
Analog core positive supply
Digital core positive supply
Case temperature
Note
—
—
—
—
—
—
Minimum
1.14
1.14
1.14
1.14
1.14
-40
Typical
1.2, 1.8, 2.5, or 3.3
1.2, 1.8, 2.5, or 3.3
1.2, 1.8, 2.5, or 3.3
1.2
1.2
25
Maximum
3.47
3.47
3.47
1.26
1.26
+85
Unit
V
V
V
V
V
°C
Table 1-3.
Symbol
P
TOTAL
Power Consumption Specifications
Parameter
Conditions
Note
1, 3
1, 4
1, 3
1, 4
1, 3
1, 4
Typical
230
250
240
260
260
270
Maximum
290
350
300
360
370
450
Unit
mW
Total power consumption AV
DDI
= AV
DDO
=DV
DDIO
=DV
DDCORE
= AV
DDCORE
=
1.2 V
SDO Swing Level 1
Total power consumption AV
DDI
= AV
DDO
=DV
DDIO
=DV
DDCORE
=
AV
DDCORE
= 1.2 V
SDO Swing Level 2
Total power consumption DV
DDCORE
= AV
DDCORE
= 1.2 V
AV
DDI
= DV
DDIO
= 1.2 V
AV
DDO
= 1.8 V
SDO Swing Level 3
DV
DDCORE
= AV
DDCORE
= 1.2 V
AV
DDI
= DV
DDIO
= 3.3 V
AV
DDO
= 3.3 V
SDO Swing Level 3
P
TOTAL
mW
P
TOTAL
mW
2, 3
720
1070
JA
JC
NOTE:
1.
2.
3.
4.
5.
Junction to ambient
thermal resistance
Junction to case thermal
resistance
5
5
35
3
—
—
°C/W
°C/W
Internal regulators disabled.
Internal regulators enabled.
SDOB/SCLK disabled.
SDOB/SCLK enabled.
Airflow = 0 m/s.
5
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice.
Visit www.macom.com for additional data sheets and product information.
