ADVANCE INFORMATION
DS3661-1·2
SP8610
1000MHz44
4
SP8611
1300/1500MHz44
4
The SP8610 and SP8611 are asynchronous ECL divide by
four circuits with ECL compatible outputs which can also be
used to drive 100Ω lines. They feature input sensitivities of
600mV p-p (800mV p-p above 1300MHz).
NC
NC
NC
CLOCK INPUT
NC
1
2
3
4
5
6
7
14
13
12
V
CC
(0V)
NC
NC
OUTPUT
OUTPUT
NC
NC
FEATURES
s
ECL Compatible Outputs
s
AC-Coupled Inputs (Internal Bias)
QUICK REFERENCE DATA
s
Supply Voltage:
25·2V
SP8610
SP8611
11
10
INTERNAL BIAS DECOUPLING
V
EE
9
8
s
Power Consumption: 380mW
s
Max. Input Frequency: 1500MHz (SP8611B)
s
Temperature Range:
A Grade:
255°C
to
1110°C
(1125°C with suitable heat sink)
B Grade: 0°C to
170°C
DG14
Fig. 1 Pin connections - top view
ABSOLUTE MAXIMUM RATINGS
Supply voltage, V
EE
Output current
Storage temperature range
Max. junction temperature
Max. clock input voltage
28V
15mA
265°C
to
1150°C
1175°C
2·5V p-p
ORDERING INFORMATION
SP8610 A DG
SP8610 B DG
SP8610 AA DG
SP8610 NA 1C
SP8611 A DG
SP8611 B DG
SP8611 AA DG
SP8611 NA 1C
V
CC
(0V)
14
11
CLOCK INPUT
4
DIVIDE BY
2
DIVIDE BY
2
10
OUTPUT
OUTPUT
6
INTERNAL BIAS
DECOUPLING
7
V
EE
Fig. 2 Functional diagram
SP8610/11
ELECTRICAL CHARACTERISTICS
Unless otherwise stated, the Electrical Characteristics are guaranteed over specified supply, frequency and temperature range
Supply voltage, V
CC
= 0V, V
EE
=
25·2V 6
0·25V
Temperature, T
AMB
=
255°C
to
1125°C
(A Grade) (Note 1), 0°C to
170°C
(B Grade)
Value
Characteristic
Maximum frequency (sinewave input)
Symbol
f
MAX
Min.
1·0
1·3
1·5
Max.
Units
Type
Conditions
Notes
Minimum frequency (sinewave input)
Current consumption
Output low voltage
Output high voltage
Minimum output swing
f
MIN
I
EE
V
OL
V
OH
V
OUT
21·92
20·93
500
GHz SP8605A,B Input = 400-1200mV p-p
GHz SP8606A Input = 800-1200mV p-p
GHz SP8606B Input = 400-1200mV p-p
Input = 600-1200mV p-p
All
150 MHz
V
EE
=
25·45V,
outputs
All
100
mA
unloaded
All
V
EE
=
25·2V,
R
L
= 430Ω
21·62
V
(25°C)
V
EE
=
25·2V,
R
L
= 430Ω
All
20·75
V
(25°C)
V
EE
=
25·2V,
R
L
= 430Ω
All
mV
6
6
6
4
5
5
NOTES
1. The A Grade devices must be used with a heat sink to maintain chip temperature below
1150°C
when operating in a T
AMB
of
1125°C.
2. The temperature coefficients of V
OH
=
11·2mV/°C,
and V
OL
=
10·24mV/°C
but these are not tested.
3. The test configuration for dynamic testing is shown in Fig.5.
4. Tested at 25°C and
1125°C
only (170°C for B grade).
5. Tested at 25°C only
6. Tested at
1125°C
only (170°C for B grade).
SP8611A
1400
INPUT AMPLITUDE (mV p-p)
1200
1000
800
600
400
T
CASE
=
1125°C
200
T
CASE
=
255°C
0
0
100
200
300
400
500
600
700
800
900 1000 1100 1200 1300 1400 1500
INPUT FREQUENCY (MHz)
SP8611B
GUARANTEED
*
OPERATING
WINDOW
T
CASE
=
170°C
*
Tested as specified
in table of Electrical
Characteristics
Fig. 3 Typical input characteristic of SP8611
THERMAL CHARACTERISTICS
u
JC
approximately 30°C/W
u
JA
approximately 110°C/W
OPERATING NOTES
1. The clock input (pin 4) should be capacitively coupled to the
signal source. The input signal path is completed by connecting
a capacitor from the internal bias decoupling, pin 6, to ground.
2. In the absence of a signal the device will self-oscillate. If this is
undesirable, it may be prevented by connecting a 10kΩ resistor
from the unused input to V
EE
i.e. from pin 4 to pin 7. This will reduce
the input sensitivity by approximately 100mV.
3. The circuit will operate at very low input frequencies but slew
rate must be better than 200V/µs.
4. The input impedance of the SP8610/11 is a function of frequency,
see Fig. 4.
5. The emitter follower outputs require external load resistors.
These should not be less than 330Ω and a value of 430Ω is
recommended. Interfacing to ECLlll/10K is shown in Fig. 7.
6. These devices may be used with split suopply lines and ground
referenced input; a suitable configuration is shown in Fig. 6.
7. All components should be suitable for the frequency in use.
2
SP8610/11
j1
j
0.5
j2
j
0.2
1300 1400 1500
1200
1100
1000
0.2
0.5
1
2
5
j5
0
900
2
j
5
2
j
0.2
800
700
600
500
2
j
0.5
2
j
1
2
j
2
Fig. 4 Typical input impedance. Test conditions: supply voltage =
25·2V,
ambient temperature = 25°C, frequencies in MHz,
Impedances normalised to 50Ω
V
CC
= 0V
10n
4
33
33
MONITOR
1n
20
6
14
11
50
50
1n
1n
50Ω LINE
TO SCOPE
50Ω
SIGNAL
SOURCE
DUT
7
10
430
430
V
EE
=
25·2V60·25V
25dB
ATTENUATOR
NETWORK
10n
Fig. 5 Toggle frequency test circuit
13V
10n
50Ω
SIGNAL
SOURCE
50
6
7
430
430
V
EE
=
22·2V
10n
4
14
11
50
50
1n
OUTPUT
1n
OUTPUT
DUT
10
Fig. 6 Circuit for using the input signal about ground potential
3
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