2.5Gb/s GaAs
4:1 Multiplexer IC
FEATURES
• High speed operation up to 2.7 GHz from DC
• Internal timing generator
• ECL Compatible Input and output
• Single -5.2V Power Supply
• Stable operation at wide temperature range between 0 and 85°C
• High Reliable, Metal/Ceramic 24-pin Hermatic Flat Package
FMM381CG/DG
CG
DESCRIPTION
The FMM381CG and FMM381DG are high speed GaAs 4:1 multiplexer
ICs for multi-gigabit optical communication systems and digital test
instruments. The device is designed for converting 4-bit parallel signals
to serial signal at up to 2.7 GHz. An internal timing generator is provided
for generating internally 1/4 clock signal or receiving an external 1/4
clock signal. The GaAs die is attached into advanced 24-pin
metal/ceramic flat package designed for high speed application.
DG
Edition 1.0
March 1999
1
FMM381CG/DG
ABSOLUTE MAXIMUM RATINGS (Ambient Temperature Ta = 25¡C)
Rating
Supply Voltage
Input Voltage
Reference Voltage
Power Dissipation
Storage Temperature
Symbol
VSS
VIN
VREF
Pd
Tstg
2.5Gb/s GaAs
4:1 Multiplexer IC
Values
-7.0 to 0
VSS to 0
-2.0 to 0
2.0
-55 to 125
Unit
V
V
V
W
¡C
ELECTRICAL CHARACTERISTICS (Tc = 25¡C, VSS = -5.2V)
Parameter
Supply Current
High Level Input Voltage
Low Level Input Voltage
High Level Output Voltage
Low Level Output Voltage
Output Rise Time
Output Fall Time
Maximum Clock Frequency
Symbol
ISS
VIH
VIL
VOH
VOL
tr*
tf*
fmax
VTT = -2V
50W Termination
*20%~80%
Condition
Min.
-
-1.0
-
-0.95
-
-
-
2.7
Limit
Typ. Max.
200
-0.9
-1.7
-
-
125
125
-
-
-
-1.6
-
-1.65
-
-
-
Unit
mA
V
V
V
V
ps
ps
GHz
RECOMMENDED OPERATING CONDITIONS
Parameter
Supply Voltage
Reference Voltage
Operating Case Temperature
Symbol
VSS
VREF*
Tc
Min.
-5.46
-1.4
0
Value
Typ.
-5.2
-1.3
-
Max.
-4.94
-1.2
+65
Unit
V
V
¡C
Note:
VREF which is normally open, can be used as a bias adjusting terminal to optimize the operation frequency or output waveform.
Edition 1.0
March 1999
2
2.5Gb/s GaAs
4:1 Multiplexer IC
BLOCK DIAGRAM
FMM381CG/DG
Data In 0
Data In 1
Data In 2
Data In 3
4-bit Shift
Resistor
Data Out
Data Out
Clock Out
Clock In
Clock
Buffer
Timing
Generator
1/4 Clock
Selector
1/4 Clock Out
1/4 Clock In
Clock Select In*
* When the low level voltage is applied to
Clock Select In, 1/4 Clock
synchronized with
Clock
is generated
internally. For
Clock Select In
kept open, the low level is generated internally. When the high level voltage
is applied to
Clock Select In, 1/4 Clock In
is selected and required to be synchronized externally with
Clock.
TIMING DIAGRAM
(1) Clock Select In = Low or Open
Clock In
1/4 Clock Out
Data In 0
Data In 1
Data In 2
Data In 3
Output Data
#0
#1
#2
#3
#0'
#1'
#2'
#3'
(2) Clock Select In = High
Clock In
1/4 Clock In
1/4 Clock Out
Data In 0
Data In 1
Data In 2
Data In 3
Output Data
#0
#1
#2
#3
#0'
#1'
#2'
#3'
#0 #1 #2 #3 #0' #1'
#0 #1 #2 #3 #0' #1'
Edition 1.0
March 1999
3
2.5Gb/s GaAs
4:1 Multiplexer IC
For further information please contact:
FMM381CG/DG
FUJITSU COMPOUND SEMICONDUCTOR, INC.
Americas & R.O.W.
2355 Zanker Rd.
San Jose, CA 95131-1138, U.S.A.
Phone: (408) 232-9500
FAX: (408) 428-9111
55 Schanck Road,
Suite A-2
Freehold, NJ 07728-2964, U.S.A.
Phone: (732) 303-0282
FAX: (732) 431-3393
CAUTION
Fujitsu Compound Semiconductor Products contain
gallium arsenide
(GaAs)
which can be hazardous to the human body and the environment.
For safety, observe the following procedures:
• Do not put this product into the mouth.
• Do not alter the form of this product into a gas, powder, or liquid
through burning, crushing, or chemical processing as these by-products
are dangerous to the human body if inhaled, ingested, or swallowed.
• Observe government laws and company regulations when discarding this
product. This product must be discarded in accordance with methods
specified by applicable hazardous waste procedures.
www.fcsi.fujitsu.com
FUJITSU MIKROELECTRONIK GmbH
Quantum Devices Division
Network House
Norreys Drive
Maidenhead, Berkshire SL6 4FJ, UK
Phone:+44 (0)1628 504800
FAX:+44 (0)1628 504888
FUJITSU QUANTUM DEVICES, LTD.
Asia & Japan
2-7-1, Nishi Shinjuku
Shinjuku-ku, Tokyo 163-0721
Japan
Phone: 3-5322-3356
FAX: 3-5322-3398
Fujitsu Limited reserves the right to change products and specifications without notice.
The information does not convey any license under rights of Fujitsu Limited or others.
© 1999 FUJITSU COMPOUND SEMICONDUCTOR, INC.
Printed in U.S.A. FCSI0199M200
Edition 1.0
March 1999
5
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