NBSG72A
2.5 V/3.3 V SiGe Differential
2 x 2 Crosspoint Switch
with Output Level Select
The NBSG72A is a high-bandwidth fully differential 2
×
2
crosspoint switch with Output Level Select (OLS) capabilities. This is
a part of the GigaCommt family of high performance Silicon
Germanium products. The device is housed in a low profile 3
×
3 mm
16-pin QFN package.
Differential inputs incorporate internal 50
W
termination resistors
and accept NECL (Negative ECL), PECL (Positive ECL),
LVCMOS/LVTTL, CML, or LVDS. The OLS input is used to
program the peak-to-peak output amplitude between 0 mV and
800 mV in five discrete steps. The SELECT inputs are single-ended
and can be driven with either LVECL or LVCMOS/LVTTL
input levels.
Features
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QFN−16
MN SUFFIX
CASE 485G
MARKING DIAGRAM*
16
•
•
•
•
•
Maximum Input Clock Frequency > 7 GHz Typical
Maximum Input Data Rate > 7 Gb/s Typical
200 ps Typical Propagation Delay (OLS = FLOAT)
55/45 ps Typical Rise/Fall Times (OLS = FLOAT)
A
L
Y
W
G
Selectable Swing PECL Output with Operating Range:
V
CC
= 2.375 V to 3.465 V with V
EE
= 0 V
•
Selectable Swing NECL Output with NECL Inputs with
Operating Range: V
CC
= 0 V with V
EE
= −2.375 V to −3.465 V
•
Selectable Output Levels (0 mV, 200 mV, 400 mV, 600 mV or
800 mV Peak-to-Peak Output)
•
50
W
Internal Input Termination Resistors
(Note: Microdot may be in either location)
*For additional marking information, refer to
Application Note AND8002/D.
•
Single-Ended LVECL or LVCMOS/LVTTL Select Inputs
(SELA, SELB)
•
These are Pb-Free Devices
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 15 of this data sheet.
©
Semiconductor Components Industries, LLC, 2014
1
June, 2014 − Rev. 8
ÇÇÇ
ÇÇÇ
1
SG
72A
ALYWG
G
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb-Free Package
Publication Order Number:
NBSG72A/D
NBSG72A
Exposed Pad (EP)
V
CC
16
V
TD0
D0
D0
SELA
Q0
15
Q0
14
OLS
13
1
2
NBSG72A
3
4
12 V
CC
11 Q1
10 Q1
9
SELB
5
V
EE
6
D1
7
D1
8
V
TD1
Figure 1. QFN−16 Pinout
(Top View)
Table 1. PIN DESCRIPTION
Pin No.
1
2
Name
VTD0
D0
I/O
−
LVDS, CML, ECL,
LVTTL, LVCMOS
Input
LVDS, CML, ECL,
LVTTL, LVCMOS
Input
LVECL, LVCMOS
Input
−
LVDS, CML, ECL,
LVTTL, LVCMOS
Input
LVDS, CML, ECL,
LVTTL, LVCMOS
Input
−
Description
Common Internal 50
W
Termination Pin for D0 and D0 Input. See Table 4. (Note 1)
Inverted Differential Input 0.
3
D0
Noninverted Differential Input 0.
4
5
6
SELA
V
EE
D1
Select Logic Input A. Internal 75 kW Pulldown to V
EE
.
Negative Supply. All V
EE
Pins must be Externally Connected to Power Supply to
Guarantee Proper Operation.
Inverted Differential Input 1.
7
D1
8
9
VTD1
SELB
Q1
Q1
LVECL, LVCMOS
Input
RSECL Output
RSECL Output
−
Input
RSECL Output
RSECL Output
−
−
10
11
12
13
14
15
16
−
V
CC
OLS
(Note 2)
Q0
Q0
V
CC
EP
1. In the differential configuration when the input termination pins (VTD0, VTD1) are connected to a common termination voltage, and if no signal
is applied then the device will be susceptible to self-oscillation.
2. When an output level of 400 mV is desired and V
CC
− V
EE
> 3.0 V, 2 kW resistor should be connected from OLS pin to V
EE
.
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Noninverted Differential Input 1.
Common Internal 50
W
Termination Pin for D1 and D1 Input. See Table 4. (Note 1)
Select Logic Input B. Internal 75 kW Pulldown to V
EE
.
Noninverted Differential Output.
Inverted Differential Output.
Positive Supply. All V
CC
Pins must be Externally Connected to Power Supply to
Guarantee Proper Operation.
Input Pin for Output Level Select (OLS) See Table 3.
Noninverted Differential Output Typically Terminated with 50
W
Resistor to
V
TT
= V
CC
− 2.0 V.
Inverted Differential Output Typically Terminated with 50
W
Resistor to
V
TT
= V
CC
− 2.0 V.
Positive Supply. All V
CC
Pins must be Externally Connected to Power Supply to
Guarantee Proper Operation.
The Exposed Pad (EP) on the QFN−16 package bottom is thermally connected to the
die for improved heat transfer out of package. The exposed pad must be attached to
a heat-sinking conduit. The pad is not electrically connected to the die but may be
electrically and thermally connected to V
EE
on the PC board.
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NBSG72A
VTD0
50
W
D0
D0
D1
D1
50
W
VTD1
SELA
75 kW
2
SELB
75 kW
OLS
2
50
W
2
2
2
Q1
Q1
V
CC
V
EE
2
2
50
W
2
2
2
Q0
Q0
+
Table 2. TRUTH TABLE
SELA
LOW
HIGH
LOW
HIGH
SELB
LOW
LOW
HIGH
HIGH
Q0
D0
D1
D0
D1
Q1
D0
D0
D1
D1
Figure 2. Logic/Block Diagram
Table 3. OUTPUT LEVEL SELECT (OLS)
OLS
V
CC
V
CC
− 0.4 V
V
CC
− 0.8 V
V
CC
− 1.2 V
V
EE
(Note 3)
FLOAT
Output Amplitude (V
OUTPP
)
800 mV
200 mV
600 mV
0
400 mV
600 mV
OLS Sensitivity
OLS − 75 mV
OLS
±
150 mV
OLS
±
100 mV
OLS
±
75 mV
OLS
±
100 mV
N/A
3. When an output level of 400 mV is desired and V
CC
− V
EE
> 3.0 V, a 2 kW resistor should be connected from OLS to V
EE
.
Table 4. INTERFACING OPTIONS
Interfacing Options
CML
LVDS
AC−COUPLED
RSECL, PECL, NECL
LVCMOS / LVTTL
Connect VTD0 and VTD1 to V
CC
VTD0 and VTD1 Should Be Left Floating.
Bias VTD0 and VTD1 Inputs within Common Mode Range (VIHCMR)
Standard ECL Termination Techniques
The external voltage should be applied to the unused complementary differential input.
Nominal voltage is 1.5 V for LVTTL and V
CC
/2 for LVCMOS Inputs.
Connections
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NBSG72A
Table 5. ATTRIBUTES
Characteristics
Internal Input Pulldown Resistor (SELA, SELB)
ESD Protection
Human Body Model
Machine Model
Charged Device Model
Value
75 kW
> 2 kV
> 50 V
> 1 kV
Level 1
Oxygen Index: 28 to 34
UL 94 V−0 @ 0.125 in
436
Moisture Sensitivity (Note 4)
Flammability Rating
Transistor Count
Meets or exceeds JEDEC Spec EIA/JESD78 IC Latchup Test
4. For additional information, see Application Note AND8003/D.
Table 6. MAXIMUM RATINGS
Symbol
V
CC
V
EE
V
I
V
INPP
I
out
I
IN
T
A
T
stg
q
JA
q
JC
T
sol
Parameter
Positive Power Supply
Negative Power Supply
Positive Input
Negative Input
Differential Input Voltage |D
X
− D
X
|
Output Current
Input Current Through R
T
(50
W
Resistor)
Operating Temperature Range
Storage Temperature Range
Thermal Resistance (Junction-to-Ambient)
(Note 5)
Thermal Resistance (Junction-to-Case)
Wave Solder
Pb-Free
0 lfpm
500 lfpm
(Note 5)
< 3 sec @ 260°C
Condition 1
V
EE
= 0 V
V
CC
= 0 V
V
EE
= 0 V
V
CC
= 0 V
V
EE
− V
CC
≥
2.8 V
V
EE
− V
CC
< 2.8 V
Continuous
Surge
Static
Surge
V
I
≤
V
CC
V
I
≥
V
EE
Condition 2
Rating
3.6
−3.6
3.6
−3.6
2.8
|V
CC
− V
EE
|
25
50
45
80
−40 to +85
−65 to +150
42
35
4
265
Units
V
V
V
V
mA
mA
mA
°C
°C
°C/W
°C/W
°C
Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality
should not be assumed, damage may occur and reliability may be affected.
5. JEDEC standard multilayer board − 1S2P (1 signal, 2 power).
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NBSG72A
Table 7. DC CHARACTERISTICS, INPUT WITH PECL OUTPUT
(V
CC
= 2.5 V; V
EE
= 0 V) (Note 6)
−40°C
Symbol
Characteristic
Min
Typ
Max
Min
25°C
Typ
Max
Min
85°C
Typ
Max
Unit
POWER SUPPLY CURRENT
I
EE
V
OH
V
OL
Negative Power Supply Current
40
55
65
40
55
65
40
55
65
mA
PECL OUTPUTS
(Note 7)
Output HIGH Voltage
Output LOW Voltage
(OLS = V
CC
)
(OLS = V
CC
− 0.4 V)
(OLS = V
CC
− 0.8 V, OLS = FLOAT)
(OLS = V
CC
− 1.2 V)
(OLS = V
EE
)
V
OUTPP
Output Voltage Amplitude
(OLS = V
CC
)
(OLS = V
CC
− 0.4 V)
(OLS = V
CC
− 0.8 V, OLS = FLOAT)
(OLS = V
CC
− 1.2 V)
(OLS = V
EE
)
Input HIGH Voltage
D0, inv-D0, D1, inv-D1, SELA, SELB
Input LOW Voltage
D0, inv-D0, D1, inv-D1, SELA, SELB
Input Threshold Reference Voltage
Range (Note 9)
Single-Ended Input Voltage
(V
IH
– V
IL
)
555
1235
775
1455
1005
670
125
510
0
325
705
1295
895
1505
1095
800
215
615
5
415
855
1385
1015
1585
1215
595
1270
810
1490
1040
660
120
505
0
320
745
1330
930
1540
1130
795
210
610
0
410
895
1420
1050
1620
1250
625
1295
840
1510
1065
655
120
500
0
320
775
1355
960
1560
1155
790
210
605
0
410
925
1445
1080
1640
1275
mV
1460
1510
1560
1490
1540
1590
1515
1565
1615
mV
mV
DIFFERENTIAL CLOCK INPUTS DRIVEN SINGLE-ENDED
(Figures 12 & 14) (Note 8)
V
IH
V
IL
V
th
V
ISE
1200
0
950
150
V
CC
V
IH
−
150
V
CC
–
75
2600
1200
0
950
150
V
CC
V
IH
−
150
V
CC
–
75
2600
1200
0
950
150
V
CC
V
IH
−
150
V
CC
–
75
260
mV
mV
mV
mV
DIFFERENTIAL INPUTS DRIVEN DIFFERENTIALLY
(Figures 13 & 15) (Note 10)
V
IHD
V
ILD
V
ID
V
IHCMR
I
IH
I
IL
R
TIN
Differential Input HIGH Voltage
Differential Input LOW Voltage
Differential Input Voltage
(V
IHD
– V
ILD
)
Input HIGH Voltage Common Mode
Range (Note 11) (Figure 16)
Input HIGH Current (@V
IH
)
Input LOW Current (@V
IL
)
Internal Input Termination Resistor
45
1200
0
75
1200
35
20
V
CC
V
IHD
−
75
2600
2500
100
100
1200
0
75
1200
35
20
V
CC
V
IHD
−
75
2600
2500
100
100
1200
0
75
1200
35
20
V
CC
V
IHD
−
75
2600
2500
100
100
mV
mV
mV
mV
mA
mA
W
TERMINATION RESISTORS
50
55
45
50
55
45
50
55
Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product
performance may not be indicated by the Electrical Characteristics if operated under different conditions.
NOTE: Device will meet the specifications after thermal equilibrium has been established when mounted in a test socket or printed circuit
board with maintained transverse airflow greater than 500 lfpm. Electrical parameters are guaranteed only over the declared
operating temperature range. Functional operation of the device exceeding these conditions is not implied. Device specification limit
values are applied individually under normal operating conditions and not valid simultaneously.
6. Input and output parameters vary 1:1 with V
CC
.
7. All outputs loaded with 50
W
to V
CC
− 2.0 V.
8. V
th
, V
IH
, V
IL,
and V
ISE
parameters must be complied with simultaneously.
9. V
th
is applied to the complementary input when operating in single-ended mode. V
th
= (V
IH
− V
IL
) / 2.
10. V
IHD
, V
ILD,
V
ID
and V
IHCMR
parameters must be complied with simultaneously.
11. V
IHCMR
min varies 1:1 with V
EE
, V
IHCMR
max varies 1:1 with V
CC
. The V
IHCMR
range is referenced to the most positive side of the differential
input signal.
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