1
IDT74FCT20807
2.5V CMOS 1-TO-10 CLOCK DRIVER INDUSTRIAL TEMPERATURE RANGE
DECEMBER 2009
NOTE: EOL for
non-green parts to occur on 5/13/
10 per PDN U-09-01
2005 Integrated Device Technology, Inc. DSC - 6171/14c
IDT74FCT20807
INDUSTRIAL TEMPERATURE RANGE
2.5V CMOS
1-TO-10 CLOCK DRIVER
DESCRIPTION:
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
IN
O1
O2
O3
O4
O5
O6
O7
O8
O9
O10
PIN CONFIGURATION
GND
VCC
GND
VCC
GND
GND
VCC
GND
O5
VCC
IN
O1
O2
O3
O4
O10
O9
O8
O7
O6
1
2
3
4
5
6
7
8
9
10 11
12
13
14
15
16
17
18
19
20
SSOP/ QSOP
TOP VIEW
FEATURES:
• 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
NOTE: EOL for non-green parts to occur on 5/13/10 per
PDN U-09-01
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
2
INDUSTRIAL TEMPERATURE RANGE
IDT74FCT20807
2.5V CMOS 1-TO-10 CLOCK DRIVER
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. This parameter is not directly testable, but is derived for use in Total Power Supply calculations.
4.IC = IQUIESCENT + IINPUTS + IDYNAMIC
IC = ICC + ∆ICC DHNT + ICCD (fi)
ICC = Quiescent Current (ICCL, ICCH and ICCZ)
∆ICC = Power Supply Current for a TTL High Input (VIN = VCC -0.6V)
DH = Duty Cycle for TTL Inputs High
NT = Number of TTL Inputs at DH
ICCD = Dynamic Current Caused by an Input Transition Pair (HLH or LHL)
fi = Input Frequency
ABSOLUTE MAXIMUM RATINGS(1)
Symbol Description Max Unit
VTERM(2) Terminal Voltage with Respect to GND –0.5 to +4.6 V
VTERM(3) Terminal Voltage with Respect to GND –0.5 to +5.5 V
VTERM(4) Terminal Voltage with Respect to GND –0.5 to VCC+0.5 V
TSTG Storage Temperature –65 to +150 °C
IOUT DC Output Current –60 to +60 mA
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. VCC terminals.
3. Input terminals.
4. Outputs and I/O terminals.
CAPACITANCE (TA = +25OC, f = 1.0MHz)
Symbol Parameter(1) Conditions Typ. Max. Unit
CIN Input Capacitance VIN = 0V 3 4 pF
COUT Output Capacitance VOUT = 0V — 6 pF
NOTE:
1. This parameter is measured at characterization but not tested.
PIN DESCRIPTION
Pin Names Description
IN Clock Inputs
Ox Clock Outputs
POWER SUPPLY CHARACTERISTICS
Symbol Parameter Test Conditions(1) Min. Typ.(2) Max. Unit
ICCL Quiescent Power Supply Current VCC = Max. — 0.1 20 µA
ICCH TTL Inputs HIGH VIN = GND or VCC
∆ICC Power Supply Current per VCC = Max. — 45 300 µA
Input HIGH VIN = VCC –0.6V
ICCD Dynamic Power Supply Current VCC = 2.7V 150 MHz — 40 — µA
per Output(3) 15 pF /MHz
VCC = Max. VIN = VCC —6590
ICTotal Power Supply Current(4) CL = 12pF VIN = GND mA
All outputs toggling VIN = VCC –0.6V — 75 100
fi = 150MHz VIN = GND
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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: TA = -40°C to +85°C, VCC = 2.5V ± 0.2V
Symbol Parameter Test Conditions(1) Min. Typ.(2) Max. Unit
VIH Input HIGH Level 1.7 — — V
VIL Input LOW Level — — 0.7 V
IIH Input HIGH Current (Input pins) VCC = Max., VI = VCC ——±1mA
IIL Input LOW Current (Input pins) VCC = Max., VI = GND — — ±1mA
VIK Clamp Diode Voltage VCC = Min., IIN = –18mA — –0.7 –1 V
IODH Output HIGH Current VCC = 2.5V, VIN = VIH or VIL, VO = 1.25V(3) -25 -45 -100 mA
IODL Output LOW Current VCC = 2.5V, VIN = VIH or VIL, VO = 1.25V (3) 20 55 120 mA
VOH Output HIGH Voltage VCC = Min. IOH = –1mA VCC–0.2 — — V
VIN = VIH or VIL IOH = –8mA 1.8(5) ——
VOL Output LOW Voltage VCC = Min. IOL = 1mA — — 0.4 V
VIN = VIH or VIL IOL = 8mA — — 0.6
IOS Short Circuit Current(4) VCC = Max., VO = GND(3) -25 -60 -135 mA
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. VOH = Vcc - 0.6V at rated current.
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INDUSTRIAL TEMPERATURE RANGE
IDT74FCT20807
2.5V CMOS 1-TO-10 CLOCK DRIVER
NOTES:
1. tPLH and tPHL are production tested. All other parameters guaranteed but not production tested.
2. Propagation delay range indicated by Min. and Max. limit is due to VCC, 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 tPHL and tPLH of same output under identical load conditions.
6. Part to part skew for all outputs given identical transitions and load conditions at identical VCC levels and temperature.
7. Airflow of 1m/s is recommended for frequencies above 133MHz.
SWITCHING CHARACTERISTICS OVER OPERATING RANGE(1,2)
Following Conditions Apply Unless Otherwise Specified
Industrial: TA = -40°C to +85°C, VCC = 2.5V ± 0.2V
Symbol Parameter Conditions(3,7) Min.Typ. Max.Unit
tPLH Propagation Delay CL = 12pF — 2.4 2.7 ns
tPHL 150 MHz
tROutput Rise Time — 1 1.2 ns
tFOutput Fall Time — 1 1.2 ns
tSK(O) Same Device Output Pin-to-Pin Skew(4) — 100 150 ps
tSK(P) Pulse Skew(5) — 250 300 ps
tSK(PP) Part-to-Part Skew(6) — 400 600 ps
Symbol Parameter Conditions(3) Min.Typ. Max.Unit
tPLH Propagation Delay CL = 22pF — 3 3.5 ns
tPHL 100 MHz
tROutput Rise Time — 1 1.25 ns
tFOutput Fall Time — 1 1.25 ns
tSK(O) Same Device Output Pin-to-Pin Skew(4) — 100 150 ps
tSK(P) Pulse Skew(5) — 250 300 ps
tSK(PP) Part-to-Part Skew(6) — 400 600 ps
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IDT74FCT20807
2.5V CMOS 1-TO-10 CLOCK DRIVER INDUSTRIAL TEMPERATURE RANGE
tPLH1
OUTPUT 1
OUTPUT 2
tSK(o)
tPLH2
2.5V
0V
VOH
1.25V
1.25V
VOL
VOH
1.25V
VOL
INPUT tPHL1
tPHL2
tSK(o)
tSK(o) = |tPLH2 - tPLH1| or |tPHL2 - tPHL1|
2.5V
0V
VOH
tPLH tPHL
VOL
1.25V
1.25V
tRtF
1.7V
0.7V
INPUT
OUTPUT
tPLH tPHL
2.5V
0V
VOH
1.25V
1.25V
VOL
tSK(p) = |tPHL - tPLH|
INPUT
OUTPUT
INPUT tPLH1
DEVICE 1 OUTPUT
DEVICE 2 OUTPUT
tSK(t)
tPLH2
2.5V
0V
VOH
1.25V
1.25V
VOL
VOH
1.25V
VOL
tPHL1
tPHL2
tSK(t)
tSK(t) = |tPLH2 - tPLH1| or |tPHL2 - tPHL1|
Pulse
Generator
VIN VOUT
VCC
CL
D.U.T.
TEST CIRCUITS AND WAVEFORMS
NOTE: Device 1 and device 2 are same package type and speed grade.
Pulse Skew - tSK(P)
Part-to-Part Skew - tSK(PP)
Propagation Delay
Output Skew - tSK(O)
CL = Load Capacitance: Includes Jig and Probe Capacitance
TEST CONDITIONS
Symbol VCC = 2.5V ±0.2V Unit
CL22(1) pF
12(2)
RTZOUT of pulse generator Ω
tR / tF1.25(1) ns
1.2(2)
DEFINITIONS:
CL = Load capacitance: includes jig and probe capacitance.
RT = Termination resistance: should be equal to ZOUT of the Pulse Generator.
tR / tF = Rise/Fall time of the input stimulus from the Pulse Generator.
NOTES:
1. Test conditions at 100MHz.
2. Test conditions at 150MHz.
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INDUSTRIAL TEMPERATURE RANGE
IDT74FCT20807
2.5V CMOS 1-TO-10 CLOCK DRIVER
ORDERING INFORMATION
IDT74FCT
Temp. Range
XXXX
Device Type
X
Package
20807 1-to-10 2.5V Clock Driver
PY
Q
QG
Shrink Small Outline IC
Quarter-size Small Outline IC
QSOP - Green
X
I Industrial (-40°C to +85°C)
CORPORATE HEADQUARTERS for SALES: for Tech Support:
6024 Silver Creek Valley Road 800-345-7015 or 408-284-8200 clockhelp@idt.com
San Jose, CA 95138 fax: 408-284-2775
www.idt.com
NOTE: EOL for non-green parts to occur on 5/13/10 per PDN U-09-01
