ETC TQ8710

T
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T
S E M I C O N D U C T O R , I N C .
TQ8710
V DD
1
28
IN
N.C.
2
27
NIN
G ND
3
26
VD D
O UT1
4
25
OU T10
N O UT1
5
24
NO U T10
O UT2
6
23
OU T9
N O UT2
7
22
NO U T9
Features
O UT3
8
21
OU T8
• 1.5 GHz or 2.7Gb/s
N O UT3
9
20
NO U T8
• Single +3.3V Power Supply
O UT4
10
19
OU T7
• Differential LVPECL/ECL levels
N O UT4
11
18
NO U T7
• 50ps output-output skew
G ND
12
17
OU T6
• 1pS RMS additive jitter
O UT5
13
16
NO U T6
N O UT5
14
15
VD D
• Off-chip input termination for
daisy chain applications
1.5GHz/2.7 Gb/s
1:10 50W Driver/Buffer
• May be AC or DC coupled
• 28-pin TSSOP surface mounted
package
The TQ8710 is a 1 input to 10 output buffer utilizing a 3.3V single power supply
and differential LVPECL/ECL input and output signal levels. The device is well
suited to high speed clock fanout applications where low skew and low additive
jitter are important considerations.
The device is capable of either direct coupled LVPECL/ECL interfacing or AC
coupled operation. Minimum differential signal sensitivity of 200mVp-p allows
the device to be AC coupled to most types of balanced high speed signalling
levels. The device is suitable for driving 50W transmission lines, including
stripline, microstrip, coax structures and cables.
Applications
• Clock distribution to 1.5 GHz
• Data distribution to 2.7 Gb/S
• CMOS backplane buffering
• 50W Backplane driver
• 50W Coax driver
The device is packaged in a plastic TSSOP package which addresses thermal
management through the use of a metal tab on the bottom center of the
package. This tab is utilized as a required Vdd power supply connection as well
as a thermal path to the host circuit board.
For additional information and latest specifications, see our website: www.triquint.com
1
TQ8710
DATA SHEET
Specifications
Table 1. Absolute Maximum Ratings4
Parameter
Notes
Symbol
Minimum
Storage Temperature
Tstore
Junction Temperature
Case Temperature w/bias
(1)
TCH
TC
Supply Voltage
Voltage to any input
(2)
(2)
Voltage to any output
Current to any LVTTL input
Current to any LVPECL input
Current from any output
Power Dissipation of output
Nominal
Maximum
Unit
–65
150
°C
–65
0
150
100
°C
°C
VDD
Vin
0
–0.5
5.5
VDD + 0.5
V
V
(2)
(2)
(2)
Vout
Iin
Iin
–0.5
–1.0
–1.0
VDD + 0.5
1.0
1.0
V
mA
mA
(2)
(3)
Iout
Pout
40.0
50.0
mA
mW
Notes: 1. Tc is measured at case top.
2. All voltages are measured with respect to GND pin(0V) and are continuous.
3. Pout = (VDD – Vout ) x Iout .
4. Absolute maximum ratings, as detailed in this table, are the ratings beyond which the device’s performance may be impaired
and/or permanent damage to the device may occur.
Table 2. Recommended Operating Conditions 4
Symbol
Parameter
Min
Typ
Max
TC
Operating Case Temperature
0
—
85
VDD
IDD
VTT
RLOAD
Positive Supply Voltage
Positive Supply Current
Load Termination Supply Voltage
Output Termination Load Resistance
3.14
—
3.46
300
VDD – 2.0
50
Units
°C
V
mA
V
W
Notes
1
3
2
2
Notes: 1. Package thermal pad to be soldered to PCB.
2. The VTT and RLOAD combination is subject to maximum output current and power restrictions. Note that the value shown
is for DC coupled LVPECL I/O.
3. Outputs open.
4. Functionality and/or adherence to electrical specifications is not implied when the device is subjected to conditions that exceed,
singularly or in combination, the operating range specified.
2
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TQ8710
DATA SHEET
Table 3. DC Characteristics—LVPECL I/O 3
Parameter
Condition
Symbol
Minimum
Nominal
Maximum
Unit
(1)
VICOM
VIDIFF
VDD – 1500
600
—
—
VDD – 1100
2400
mV
mV
VOCOM
VODIFF
RIN
VDD-1500
1200
—
—
—
50
VDD – 1100
2400
—
mV
mV
KW
Input capacitance
Output capacitance
CIN
COUT
—
—
0.5
0.5
—
—
pF
pF
ESD breakdown rating
VESD
1000
—
—
V
Input common mode voltage range
Input differential voltage (pk-pk)
Output common mode voltage range
Output differential voltage (pk-pk)
Equivalent Input resistance
(1,2)
Notes: 1. Differential Input Peak-Peak = 2| Vin - NVin |. LVDS signals up to 622MHz can be AC coupled, see application note #1.
The minimum input sensitivity under these conditions is 500mV.
2. RLOAD = 50 ohms to VTT = VDD – 2.0V.
3. Specifications apply over recommended operating ranges.
Table 4. AC Characteristics
Parameter
Condition
Symbol
Data Rate/port
Clock Rate/port
Minimum
Nominal
Maximum
2.7
1.5
Input pulse width
Rise/Fall time 20-80%
Jitter (pk-pk)
Jitter (RMS-fixed frequency)
(1)
(2)
Tpw
Tr/f
Tjitter
Tjitter
333
—
—
—
Unit
Gb/s
GHz
—
100
6
0.6
—
150
10
1
ps
ps
ps
ps
Notes: 1. Measured at crossing point of true and complement
2. Crossing of (On) – (NOn) measured with 223 – 1 PRBS, measured over extended time.
Table 5. Timing Specifications
Parameter
Channel Propagation Delay
Ch-to-Ch Prop. Delay Skew
Notes:
Condition
Symbol
Minimum
Nominal
Maximum
Unit
(1)
(1)
Tpd
Tskew
—
—
—
—
1000
50
ps
ps
1. Measured at crossing point of true and complement
For additional information and latest specifications, see our website: www.triquint.com
3
TQ8710
DATA SHEET
Table 6. TQ8710 Pin Descriptions
Signal
Type
Pin Number
Description
DLVPECL Input
28,27
True and Complement DLVPECL Clock/Data In.
OUT1,NOUT1
DLVPECL Output
4,5
True and Complement DLVPECL Clock/Data Out
OUT2,NOUT2
DLVPECL Output
6,7
True and Complement DLVPECL Clock/Data Out
OUT3,NOUT3
DLVPECL Output
8,9
True and Complement DLVPECL Clock/Data Out
OUT4,NOUT4
DLVPECL Output
10,11
True and Complement DLVPECL Clock/Data Out
OUT5,NOUT5
DLVPECL Output
13,14
True and Complement DLVPECL Clock/Data Out
OUT6,NOUT6
DLVPECL Output
17,16
True and Complement DLVPECL Clock/Data Out
OUT7,NOUT7
DLVPECL Output
19,18
True and Complement DLVPECL Clock/Data Out
OUT8,NOUT8
DLVPECL Output
21,20
True and Complement DLVPECL Clock/Data Out
OUT9,NOUT9
DLVPECL Output
23,22
True and Complement DLVPECL Clock/Data Out
OUT10,NOUT10
DLVPECL Output
25,24
True and Complement DLVPECL Clock/Data Out
Input Ports
IN,NIN
Output Ports
Power Pins
Signal
Description
VDD
Positive Power Supply
1, 15, 26, Package Down Paddle (required)
GND
Negative Power Supply
3, 12
N/C
Do Not Connect
2
4
Pin Number
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TQ8710
DATA SHEET
Application notes
1. Recommended LVDS to TQ8710 interface for AC balanced signals above 100KHz.
+3.3V
680
680
0.01µF
LVDS
TQ8710
100
0.01µF
1050
1050
2. Power supply connections for ECL operation.
Vtt = -2.0V
50
50
TQ8710
Vdd
ECL input device
GND
-3.3V
-3.3V
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5
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