IDT74FCT20807
2.5V CMOS 1-TO-10 CLOCK DRIVER
INDUSTRIAL TEMPERATURE RANGE
2.5V CMOS
1-TO-10 CLOCK DRIVER
IDT74FCT20807
FEATURES:
•
•
•
•
•
•
•
•
•
•
•
DESCRIPTION:
High frequency > 150MHz
Guaranteed low skew < 150ps (max.) between any two outputs
Very low duty cycle distortion < 300ps
High speed: propagation delay < 3ns
Very low CMOS power levels
TTL compatible inputs and outputs
1:10 fanout
Maximum output rise and fall time < 1.25ns (max.)
Low input capacitance: 3pF typical
2.5V supply voltage
Available in SSOP and QSOP packages
The FCT20807 is a 2.5V compatible, high speed, low noise, 1:10 fanout,
non-inverting clock buffer. The large fanout from a single input reduces loading
on the preceding driver and provides an efficient clock distribution network.
Providing output to output skew as low as 150ps, the FCT20807 is an ideal clock
distribution device for synchronous systems. Multiple power and grounds
reduce noise. Typical applications are clock and signal distribution.
FUNCTIONAL BLOCK DIAGRAM
O
1
PIN CONFIGURATION
IN
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
V
CC
O
10
O
9
GND
O
8
V
CC
O
7
GND
O
6
O
5
O
2
GND
O
1
O
3
V
CC
O
2
O
4
GND
O
3
O
5
IN
O
6
V
CC
O
4
GND
O
7
SSOP/ QSOP
TOP VIEW
O
8
O
9
O
10
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
1
c
2005 Integrated Device Technology, Inc.
MAY 2010
DSC - 6171/14
IDT74FCT20807
2.5V CMOS 1-TO-10 CLOCK DRIVER
INDUSTRIAL TEMPERATURE RANGE
ABSOLUTE MAXIMUM RATINGS
(1)
Symbol
V
TERM(2)
V
TERM(3)
V
TERM(4)
T
STG
I
OUT
Description
Terminal Voltage with Respect to GND
Terminal Voltage with Respect to GND
Terminal Voltage with Respect to GND
Storage Temperature
DC Output Current
Max
–0.5 to +4.6
–0.5 to +5.5
–0.5 to V
CC
+0.5
–65 to +150
–60 to +60
Unit
V
V
V
°C
mA
CAPACITANCE
(T
A
= +25
O
C, f = 1.0MHz)
Symbol
C
IN
C
OUT
Parameter
(1)
Input Capacitance
Output Capacitance
Conditions
V
IN
= 0V
V
OUT
= 0V
Typ.
3
—
Max.
4
6
Unit
pF
pF
NOTE:
1. This parameter is measured at characterization but not tested.
NOTES:
1. Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause
permanent damage to the device. This is a stress rating only and functional operation
of the device at these or any other conditions above those indicated in the operational
sections of this specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect reliability.
2. V
CC
terminals.
3. Input terminals.
4. Outputs and I/O terminals.
PIN DESCRIPTION
Pin Names
IN
Ox
Clock Inputs
Clock Outputs
Description
POWER SUPPLY CHARACTERISTICS
Symbol
I
CCL
I
CCH
∆I
CC
I
CCD
Parameter
Quiescent Power Supply Current
TTL Inputs HIGH
Power Supply Current per
Input HIGH
Dynamic Power Supply Current
per Output
(3)
Total Power Supply Current
(4)
Test Conditions
(1)
V
CC
= Max.
V
IN
= GND or V
CC
V
CC
= Max.
V
IN
= V
CC –
0.6V
V
CC
= 2.7V
15 pF
V
CC
= Max.
C
L
= 12pF
All outputs toggling
fi = 150MHz
NOTES:
1.
2.
3.
4
.
For conditions shown as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable device type.
Typical values are at V
CC
= 2.5V, +25°C ambient.
This parameter is not directly testable, but is derived for use in Total Power Supply calculations.
I
C
= I
QUIESCENT
+ I
INPUTS
+ I
DYNAMIC
I
C
= I
CC
+
∆I
CC
D
H
N
T
+ I
CCD
(f
i
)
I
CC
= Quiescent Current (I
CCL
, I
CCH
and I
CCZ
)
∆I
CC
= Power Supply Current for a TTL High Input (V
I
N
= V
CC
-0.6V)
D
H
= Duty Cycle for TTL Inputs High
N
T
= Number of TTL Inputs at D
H
I
CCD
= Dynamic Current Caused by an Input Transition Pair (HLH or LHL)
f
i
= Input Frequency
Min.
—
—
150 MHz
V
IN
= V
CC
V
IN
= GND
V
IN
= V
CC –
0.6V
V
IN
= GND
—
—
—
Typ.
(2)
0.1
45
40
65
75
Max.
20
300
—
90
Unit
µA
µA
µA
/MHz
mA
I
C
100
2
IDT74FCT20807
2.5V CMOS 1-TO-10 CLOCK DRIVER
INDUSTRIAL TEMPERATURE RANGE
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified
Industrial: T
A
= -40°C to +85°C, V
CC
= 2.5V ± 0.2V
Symbol
V
IH
V
IL
I
IH
I
IL
V
IK
I
ODH
I
ODL
V
OH
V
OL
I
OS
Parameter
Input HIGH Level
Input LOW Level
Input HIGH Current (Input pins)
Input LOW Current (Input pins)
Clamp Diode Voltage
Output HIGH Current
Output LOW Current
Output HIGH Voltage
Output LOW Voltage
Short Circuit Current
(4)
V
CC
= Max., V
I
= V
CC
V
CC
= Max., V
I
= GND
V
CC
= Min., I
IN
= –18mA
V
CC
= 2.5V, V
IN
= V
IH
or V
IL
, V
O
= 1.25V
(3)
V
CC
= 2.5V, V
IN
= V
IH
or V
IL
, V
O
= 1.25V
(3)
V
CC
= Min.
V
IN
= V
IH
or V
IL
V
CC
= Min.
V
IN
= V
IH
or V
IL
V
CC
= Max., V
O
= GND
(3)
I
OH
= –1mA
I
OH
= –8mA
I
OL
= 1mA
I
OL
= 8mA
Test Conditions
(1)
Min.
1.7
—
—
—
—
-25
20
V
CC
–0.2
1.8
(5)
—
—
-25
Typ.
(2)
—
—
—
—
–0.7
-45
55
—
—
—
—
-60
Max.
—
0.7
±1
±1
–1
-100
120
—
—
0.4
0.6
-135
mA
V
Unit
V
V
mA
mA
V
mA
mA
V
NOTES:
1. For conditions shown as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at Vcc = 2.5V, +25°C ambient.
3. Not more than one output should be shorted at one time. Duration of the test should not exceed one second.
4. This parameter is guaranteed but not tested.
5. V
OH
= Vcc - 0.6V at rated current.
3
IDT74FCT20807
2.5V CMOS 1-TO-10 CLOCK DRIVER
INDUSTRIAL TEMPERATURE RANGE
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
(1,2)
Following Conditions Apply Unless Otherwise Specified
Industrial: T
A
= -40°C to +85°C, V
CC
= 2.5V ± 0.2V
Symbol
t
PLH
t
PHL
t
R
t
F
t
SK(O)
t
SK(P)
t
SK(PP)
Parameter
Propagation Delay
Output Rise Time
Output Fall Time
Same Device Output Pin-to-Pin Skew
(4)
Pulse Skew
(5)
Part-to-Part Skew
(6)
Conditions
(3)
C
L
= 22pF
100 MHz
Min
.
—
—
—
—
—
—
Typ.
3
1
1
100
250
400
Max
.
3.5
1.25
1.25
150
300
600
Unit
ns
ns
ns
ps
ps
ps
Symbol
t
PLH
t
PHL
t
R
t
F
t
SK(O)
t
SK(P)
t
SK(PP)
Parameter
Propagation Delay
Output Rise Time
Output Fall Time
Same Device Output Pin-to-Pin Skew
(4)
Pulse Skew
(5)
Part-to-Part Skew
(6)
Conditions
(3,7)
C
L
= 12pF
150 MHz
Min
.
—
—
—
—
—
—
Typ.
2.4
1
1
100
250
400
Max
.
2.7
1.2
1.2
150
300
600
Unit
ns
ns
ns
ps
ps
ps
NOTES:
1. t
PLH
and t
PHL
are production tested. All other parameters guaranteed but not production tested.
2. Propagation delay range indicated by Min. and Max. limit is due to V
CC
, operating temperature and process parameters. These propagation delay limits do not imply skew.
3. See test circuits and waveforms.
4. Skew measured between all outputs under identical transitions and load conditions.
5. Skew measured is difference between propagation delay times t
PHL
and t
PLH
of same output under identical load conditions.
6. Part to part skew for all outputs given identical transitions and load conditions at identical V
CC
levels and temperature.
7. Airflow of 1m/s is recommended for frequencies above 133MHz.
4
IDT74FCT20807
2.5V CMOS 1-TO-10 CLOCK DRIVER
INDUSTRIAL TEMPERATURE RANGE
TEST CIRCUITS AND WAVEFORMS
V
CC
INPUT
V
IN
Pulse
Generator
D.U.T.
C
L
OUTPUT 2
t
PLH2
t
PHL2
t
SK(o)
= |t
PLH2 -
t
PLH1
|
or
|t
PHL2 -
t
PHL1
|
V
OUT
OUTPUT 1
t
SK(o)
t
SK(o)
2.5V
1.25V
0V
V
OH
1.25V
V
OL
V
OH
1.25V
V
OL
t
PLH1
t
PHL1
C
L
= Load Capacitance: Includes Jig and Probe Capacitance
Output Skew - t
SK(O)
2.5V
1.25V
INPUT
t
PLH
t
PHL
V
OH
1.7V
OUTPUT
t
R
t
F
0.7V
1.25V
V
OL
DEVICE 2 OUTPUT
t
PLH2
t
PHL2
DEVICE 1 OUTPUT
t
SK(t)
t
SK(t)
0V
INPUT
t
PLH1
t
PHL1
2.5V
1.25V
0V
V
OH
1.25V
V
OL
V
OH
1.25V
V
OL
t
SK(t)
= |t
PLH2 -
t
PLH1
|
or
|t
PHL2 -
t
PHL1
|
Propagation Delay
Part-to-Part Skew - t
SK(PP)
NOTE:
Device 1 and device 2 are same package type and speed grade.
TEST CONDITIONS
INPUT
t
PLH
t
PHL
2.5V
1.25V
0V
V
OH
1.25V
V
OL
Symbol
C
L
R
T
t
R
/ t
F
V
CC
= 2.5V ±0.2V
22
(1)
12
(2)
Z
OUT
of pulse generator
1.25
(1)
1.2
(2)
Unit
pF
Ω
ns
OUTPUT
t
SK(p)
= |t
PHL -
t
PLH
|
Pulse Skew - t
SK(P)
DEFINITIONS:
C
L
= Load capacitance: includes jig and probe capacitance.
R
T
= Termination resistance: should be equal to Z
OUT
of the Pulse Generator.
t
R
/ t
F
= Rise/Fall time of the input stimulus from the Pulse Generator.
NOTES:
1. Test conditions at 100MHz.
2. Test conditions at 150MHz.
5
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