Advanced Science And Novel Technology Company, Inc.
2790 Skypark Drive Suite 112, Torrance, CA 90505
Offices: 310-530-9400 / Fax: 310-530-9402
www.adsantec.com

ASNT2121-KMM
DC-50Gb/s Broadband Digital 1:4 DemultiplexerPower consumption: 1.35W

Fabricated in SiGe for high performance, yield, and reliability

Custom CQFP 44-pin package

veevccSingle +3.3V or -3.3V power supplyvcc



c4op

Quarter-rate clock output

vcc



c4on

Differential CML I/O data and clock buffersvcc



q0pExhibits low jitter and limited temperature variation over industrial temperature range

vcc

q0n

High speed broadband 1:4 Demultiplexer (DMUX)

vcc

vcc
veevcc
q1p

vcc
n/c

vcc

vcc

q1n

dp

ASNT2121
ASNT2121-KMM

vcc

vcc

q2p

dnvcc

vcc

q2n

n/c

vcc

vcc
vee

Rev. 1.8.2

1vcc

cenvcc

cep

vcc

q3n

vcc

q3p

vcc

vee

vcc

vcc

May 2020

Advanced Science And Novel Technology Company, Inc.
2790 Skypark Drive Suite 112, Torrance, CA 90505
Offices: 310-530-9400 / Fax: 310-530-9402
www.adsantec.com

DESCRIPTION
vcc
q0p
q0n
q1pq1nvcc
dp
dn

q2p
q2n
q3pq3nvcc
cepcenDIV

c4op
c4onFig. 1. Functional Block Diagram

ASNT2121-KMM is a low power and high-speed digital 1-to-4 deserializer-demultiplexer (DMUX) thatfunctions seamlessly over data rates (fbit) ranging from DC to its maximum frequency.
The main function of the part shown in Fig. 1 is to demultiplex an incoming high speed serial differential
CML data bit stream dp/dn running at a bit rate of fbit into 4 parallel data channels q0p/q0n, q1p/q1n,q2p/q2n, q3p/q3n running at a bit rate of fbit/4. Differential or single-ended full-rate clock cep/cen must
be provided by an external source for the part to function properly.
The parallel words and clock divided-by-4 c4op/c4on are transmitted through CML output interfaces.
The clock and data outputs are phase-matched to each other resulting in a very little relative skew over theoperating temperature range of the device.
The part’s I/O’s support the CML logic interface with on chip 50Ohm termination to vcc and may be useddifferentially, AC/DC coupled, single-ended, or in any combination (see also POWER SUPPLYCONFIGURATION). In the DC-coupling mode, the input signal’s common mode voltage should comply
with the specifications shown in ELECTRICAL CHARACTERISTICS. In the AC-coupling mode, theinput termination provides the required common mode voltage automatically. The differential DC
signaling mode is recommended for optimal performance.

POWER SUPPLY CONFIGURATION
The part can operate with either negative supply (vcc = 0.0V = ground and vee = −3.3V), or positive
supply (vcc = +3.3V and vee = 0.0V = ground). In case of the positive supply, all I/Os need ACtermination when connected to any devices with 50Ohm termination to ground. Different PCB layouts
will be needed for each different power supply combination.
Rev. 1.8.2

2May 2020

Advanced Science And Novel Technology Company, Inc.
2790 Skypark Drive Suite 112, Torrance, CA 90505
Offices: 310-530-9400 / Fax: 310-530-9402
www.adsantec.com

All the characteristics detailed below assume vcc = 0.0V and vee = -3.3V.

ABSOLUTE MAXIMUM RATINGS
Caution: Exceeding the absolute maximum ratings shown in Table 1 may cause damage to this productand/or lead to reduced reliability. Functional performance is specified over the recommended operating
conditions for power supply and temperature only. AC and DC device characteristics at or beyond theabsolute maximum ratings are not assumed or implied. All min and max voltage limits are referenced toground.
Table 1. Absolute Maximum Ratings

Parameter
Supply Voltage (vee)Power Consumption
RF Input Voltage Swing (SE)
Case Temperature
Storage Temperature
Operational Humidity
Storage Humidity

Rev. 1.8.2Min-4010103Max-3.6
1.5
1.0+100+1009898UnitsVW
VºCºC%%May 2020

Advanced Science And Novel Technology Company, Inc.
2790 Skypark Drive Suite 112, Torrance, CA 90505
Offices: 310-530-9400 / Fax: 310-530-9402
www.adsantec.com

TERMINAL FUNCTIONSTERMINAL
Name
No.
Type
q0p
q0n
q1p
q1n
q2pq2nq3pq3n
c4op
c4on
cep
cen
dp
dn
Name
vcc
vee
n/c

Rev. 1.8.2

30
32
37
39
41
43
4626
28

CML
outputCML
outputCML
outputCML
outputCML
outputDESCRIPTION
Low-Speed I/OsDifferential quarter-rate data outputs. Require external SE
50Ohm termination to vcc

Differential quarter-rate clock outputs. Require external SE
50Ohm termination to vcc
High-Speed I/Os
8
CML Differential full-rate clock inputs with internal 50Ohm
input termination to vcc
10
19
CML Differential full-rate data inputs with internal 50Ohm
input termination to vcc
17
Supply and Termination Voltages
Description
Pin Number
Positive power supply
1, 3, 5, 7, 9, 11, 12, 14, 16, 18, 20, 22, 23, 25, 27,(+3.3V or 0)
29, 31, 33, 34, 36, 38, 40, 42, 44
Negative power supply
2, 13, 24, 35(0V or -3.3V)
Not connected pins
15, 214May 2020

Advanced Science And Novel Technology Company, Inc.
2790 Skypark Drive Suite 112, Torrance, CA 90505
Offices: 310-530-9400 / Fax: 310-530-9402
www.adsantec.com

ELECTRICAL CHARACTERISTICSPARAMETERMIN

TYP MAX UNIT
COMMENTS
General Parameters-3.1-3.3-3.5
V
±6%
vee
0.0
V
External ground
vcc
Ivee
410mA
Power consumption
1350mW
Junction temperature -4025125°C
HS Input Data (dp/dn)
Data Rate
DC4050Gb/s
Swing
0.20.8V
Differential or SE, p-p
CM Voltage Level
vcc-0.8
vcc
VMust match for both inputs
HS Input Clock (cep/cen)Frequency
DC4050GHz
Swing
0.20.8V
Differential or SE, p-p
CM Voltage Level
vcc-0.8
vcc
VMust match for both inputs
Duty Cycle
405060%LS Output Data (q0p/q0n, q1p/q1n, q2p/q2n, q3p/q3n)
Data Rate
DC1012.5 Gb/s
Logic “1” level
Vvcc
Logic “0” levelvcc-0.45
VWith external 50Ohm DC termination
Output Jitter3psPeak-to-peak at 10Gb/s
LS Output Clock (c4op/c4on)
Frequency
DC1012.5
GHz
Logic “1” level
Vvcc
Logic “0” levelvcc-0.45
VWith external 50Ohm DC termination
Duty Cycle
50%
Output Jitter2ps
Peak-to-peak at 10GHz

PACKAGE INFORMATIONThe chip die is housed in a custom, 44-pin CQFP package shown in Fig. 2. The package provides a center
heat slug located on its back side to be used for heat dissipation. ADSANTEC recommends for thissection to be soldered to the vcc plain, which is ground for a negative supply, or power for a positivesupply.
The part’s identification label is ASNT2121-KMM. The first 8 characters of the name before the dashidentify the bare die including general circuit family, fabrication technology, specific circuit type, and partversion while the 3 characters after the dash represent the package’s manufacturer, type, and pin outcount.
This device complies with the Restriction of Hazardous Substances (RoHS) per 2011/65/EU for all ten
substances.
Rev. 1.8.2

5May 2020

Advanced Science And Novel Technology Company, Inc.
2790 Skypark Drive Suite 112, Torrance, CA 90505
Offices: 310-530-9400 / Fax: 310-530-9402
www.adsantec.com

Fig. 2. CQFP 44-Pin Package Drawing (All Dimensions in mm)

Rev. 1.8.2

6May 2020

Advanced Science And Novel Technology Company, Inc.
2790 Skypark Drive Suite 112, Torrance, CA 90505
Offices: 310-530-9400 / Fax: 310-530-9402
www.adsantec.com

REVISION HISTORY
Revision
1.8.2
1.7.2
1.7.1
1.6.1

Date
05-2020
07-2019
05-2015
02-20131.5.101-2013

1.4.101-2013

1.3.1

12-2011

1.2

11-2011

1.107-2011

Rev. 1.8.2

Changes
Updated package information
Updated Letterhead
Updated package information
Title correction
Corrected description
Corrected electrical characteristics
Updated package information
Corrected block diagram
Package information correction
Absolute maximum ratings correction
Description correction
Format correction
Format correction
Power and current consumption correction
Absolute maximum ratings correction
Format correction
Electrical specifications correction
Package pin out drawing update
Terminal functions table has been corrected
Added absolute maximums ratings table
Added packaging information
First release

7May 2020