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

ASNT1122-KMC
DC-32Gbps Broadband 1 of 4 Selector/Switch

CML compliant single ended input data interfaces

Fully differential CML output data interface

Digital control signals

Adjustable output signal’s duty cycleSingle +3.3V or -3.3V power supplyPower consumption: 300mW

Fabricated in SiGe for high performance, yield, and reliability

Custom CQFP 24-pin packagevee

Ideal for high speed proof-of-concept prototyping

vcc

d0p

Exhibits low jitter and limited temperature variation over industrial temperature range

vcc

d1p

High speed broadband switch connecting one of four inputs to a single output

vcc

vee

vcc

vcc

d2p

outp

ASNT1122

vcc

vcc

d3p

outn

vcc

vcc

Rev. 3.5.2

1

vcc

sel2

vcc

sel1

vcc

veevbias

July 2019

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

DESCRIPTIONvcc
d0p

d1p

vcc
outpoutn

d2p

d3p
vbias
sel1sel2
Fig. 1. Functional Block Diagram

The temperature stable and broadband ASNT1122-KMC SiGe IC is a high isolation selector switch that is
intended for use in high-speed measurement/test equipment. The IC shown in Fig. 1 routs one of 4 singleended CML inputs (d0p, d1p, d2p, d3p) to its differential CML output outp/outn while effectively
blocking the other data inputs with high isolation. Selection of a specific data input is controlled by twodigital control signals sel1 and sel2 in accordance with Table 1. The duty cycle of the output signal iscontrolled by an external analog voltage vbias.
Table 1. Switch Controls

sel1 sel2outpoutn
00d0p direct d0p inverted
01d2p direct d2p inverted
10d1p direct d1p inverted
11d3p direct d3p inverted
The part’s I/Os 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 first mode, the input signal’s common mode voltage should comply with thespecifications shown in ELECTRICAL CHARACTERISTICS. In the second mode, the input termination
provides the required common mode voltage automatically. The differential DC signaling is
recommended for the optimal performance.

POWER SUPPLY CONFIGURATION
The part can operate with either negative supply (vcc = 0.0V = ground and vee = −3.3V), or positivesupply (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. 3.5.2

2July 2019

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 2 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 (assumed vcc).
Table 2. Absolute Maximum Ratings

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

Min-401010Max-3.60.33
1.0+90+1009898UnitsVWVºCºC%%TERMINAL FUNCTIONSTERMINAL
NameNo.
Typed0p
d1p
d2p
d3p
outpoutn

15172123
119sel1
sel2vbias

357

Namevccvee
Rev. 3.5.2

CML
input

DESCRIPTION
High-Speed I/Os
Single-ended data inputs with internal 50Ohm termination tovcc

CML Differential data outputs with internal 50Ohm termination tooutput vcc. Require external SE 50Ohm termination to vcc
Controls
CMOS Digital control signals
input
Input Analog control voltage
Supply and Termination Voltages

Description
Positive power supply (+3.3V or 0V)
Negative power supply (0V or -3.3V)
3

Pin Number
2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24
1, 13, 19
July 2019

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
90mA
Power consumption
300mW
Junction temperature -40
25125°C
HS Input Data (d0p, d1p, d2p, d3p)Data Rate
032GbpsFrequency
016GHzSE Swing
50300600mV
Peak-to-peak
CM Voltage Level
vcc-330mV
At vbias = vee
Input Select (sel1, sel2)
Frequency
01 MHz
Logic “0” levelvcc-2.5
vcc-2.3
V
Logic “1” levelvcc-0.2
vcc
V
Input Bias (vbias)
Voltage range
Vveevcc
HS Output Data (outp/outn)
Data Rate
032GbpsFrequency
016
GHz
Logic “1” level
Vvcc
Logic “0” levelvcc-0.4
V
With external 50Ohm DC termination
Rise/Fall Times
141516ps
20%-80%Additive Jitter2ps
Peak-to-peak

PACKAGE INFORMATIONThe chip die is housed in a custom 24-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 positive
supply.
The part’s identification label is ASNT1122-KMC. 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.
The IC complies with the Restriction of Hazardous Substances (RoHS) per EU 2002/95/EC for all 6substances.

Rev. 3.5.2

4July 2019

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 24-Pin Package Drawing (All Dimensions in mm)

Rev. 3.5.2

5July 2019

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
3.5.2
3.5.1

Date
07-2019
06-2015

3.4.1

02-2013

3.3.1
3.2.1

01-201301-20133.001-2012

2.002-2009

1.001-2009

Rev. 3.5.2

Changes
Updated Letterhead
Revised Absolute Maximum Ratings section
Revised package information
Updated format
Title correction
Corrected output pin names
Corrected functional block diagram
Corrected description
Corrected terminal functions
Corrected electrical characteristics table
Corrected package information
Updated power and current consumptionCorrected block diagram
Updated Chip Drawing
Updated Description
Updated Power Configuration
Changed Format
Added Package Drawing
Added Power Supply Configuration text
Added Absolute Maximums Rating table
Revised Electrical Characteristics section
Revised Package Information section
Revised Electrical Characteristics section
Revised Package Information section
First release

6July 2019