CI0085B
43 Gb/s D-FF
Features
Maximum data rate: 43 Gb/s
Output amplitude: 0.9 Vpp
Single-ended clock/data input
50 Gb/s option available
General Description
The CI0085B is a dynamic D-type Flip Flop (D-FF) operating at data rates up to 43 Gb/s.
The I/O levels are SCFL (VH: 0.0 V, VL: -0.9 V). The IC is fabricated using a 0.1-m
InP HEMT process. The CI0085B is provided in a hermetically-sealed package with
V-connectors.
Applications
Waveform Shaping
Data Retiming
Decision Circuit
Truth Table
Din CKin QT QC
L
L H
H
H L
Otherwise No Change
Functional Diagram
GD-02-1-60-25-34
24 May 2002
Preliminary
QC
QT
D
Q
C
Din
CKin
50
50
70
70
CI0085B
2
Connection Table
No. NAME
FUNCTION
No. NAME
FUNCTION
1 NC No Internal Connection
8
QT
(1)
Data Output (True)
2 Din
Data Input
9
QC
(1)
Data Output (Complementary)
3 GND
Ground (0.0 V)
10 GND
Ground (0.0 V)
4 NC No Internal Connection
11 Vss Power Supply (-4.5 V)
5 NC
No Internal Connection
12 CKin
Clock Input
6 NC No Internal Connection
13
Vrefd
(2)
Data Input
Reference
7 GND
Ground (0.0 V)
14 GND
Ground (0.0 V)
Notes
(1) Terminate unused output connectors to GND through 50-ohm resistors.
(2) Internally generated reference voltage that determines the data input threshold level. By Applying 0.75V to
0.2V externally to this pin an arbitrary threshold voltage can be established.
Connection Diagram (Top View)
CK
in
QC
QT
NC
Din
NC
1
2
9
8
3
13
5
6
14
12
4
7
10
11
GND
GND
NC
GND
Vss
NC
GND
V
r
ef
d
CI0085B
NEL
CI0085B
3
Absolute Maximum Ratings
SYMBOL PARAMETER
RATING
UNIT
VSS
Power Supply Voltage
-5.0 to +0.1
V
Vin
Applied Voltage Amplitude at Clock Input (CKin)
1.2 Vpp
Vind
Applied Voltage at Data Input (Din)
-1.2 to +0.1
V
Vinck
Applied Voltage at Clock Input (CKin)
-1.2 to +1.2
V
Vout
Applied Voltage at Data Outputs (QT, QC)
TBD V
Vrefd
Applied Voltage at Vrefd pin
-1.2 to +0.1
V
Tstor
Storage Temperature
TBD C
Tc
(1)
Case Temperature under Bias
TBD C
TBD: To Be Determined
Recommended Operating Conditions
SYMBOL PARAMETER MIN.
TYP.
MAX.
UNIT
VSS
Power Supply
-4.7 -4.5 -4.3 V
Vrefd
Data Input Reference Voltage
Open or adjust in the range from 0.75 V to 0.2 V
Din
Data Input Interface
DC coupling (see DC Characteristics)
CKin
Clock Input Interface
DC coupling (see DC Characteristics) or
AC coupling (see AC Characteristics)
QT,QC
Data Output Interface
DC coupling (see DC Characteristics) ,
Terminate to GND through 50
DC Characteristics
(Vss = -4.5 V, GND = 0.0 V, Tc
(1)
= 30 C)
SYMBOL PARAMETER MIN.
TYP.
MAX.
UNIT
ISS
Power Supply Current
330
TBD
mA
VOH
Output Voltage, High (QT, QC)
TBD 0.0 V
VOL
Output Voltage, Low (QT, QC)
-0.9
TBD
V
VIH
Input Voltage, High (Din, CKin)
TBD 0.0 V
VIL
Input Voltage, Low (Din, CKin)
-0.9
TBD
V
TBD: To Be Determined
Note
(1) Tc: Temperature at package base.
CI0085B
4
AC Characteristics (43 Gb/s)
(Vss = -4.5 V, GND = 0.0 V, PN = 31, MR = 1/2, Vrefd: Adjust in the range from -0.75 V to -0.2 V)
Tc=30
C
SYMBOL PARAMETER
MIN. TYP. MAX.
UNIT
Vin
Clock Input Voltage Amplitude
TBD 0.9
Vpp
Vcenter
Clock Input Center Voltage
-0.5 0.5 V
f
MAX
Maximum Clock Frequency
43 GHz
(1)
f
MIN
Minimum Clock Frequency
35 GHz
Vamp
Output Voltage Amplitude
(QT, QC)
TBD 0.9
Vpp
tr
Output Rise Time (QT, QC)
20 - 80%
10
TBD
ps
tf
Output Fall Time (QT, QC)
20 - 80%
10
TBD
ps
PM
Phase Margin
200 deg.
(1), (2)
TBD: To Be Determined
Notes
(1)
Confirmed by error-free operation using pseudo-random pattern with a word length of 2
31
-1 bits at 43 Gb/s
(2)
Calculated as follows:
PM (measured) [ps]
23.3 [ps]
X 360 [deg.]
PM [deg.] =
where, 23.3 ps =
1
43Gb/s
CI0085B
5
Sample Waveforms (43 Gb/s)
Measurement Conditions
Vss = -4.5 V, Vrefd = -0.62 V, Input Data: 43 Gb/s, Input Clock: 43 GHz
0.2 V
/
di
v
Input (Din)
Input (CKin)
Output (QT)
Output (QC)
GND
GND
GND
GND
10 ps/div
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