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IDT49FCT20805 2.5V CMOS DUAL 1-TO-5 CLOCK DRIVER
INDUSTRIAL TEMPERATURE RANGE
2.5V CMOS DUAL 1-TO-5 CLOCK DRIVER
IDT49FCT20805 ADVANCE INFORMATION
* * * * * * * * * * * *
FEATURES:
DESCRIPTION:
Advanced CMOS Technology Guaranteed low skew < 200ps (max.) Very low propagation delay < 2.5ns (max) Very low duty cycle distortion < 270ps (max) Very low CMOS power levels Operating frequency up to 166MHz TTL compatible inputs and outputs Two independent output banks with 3-state control 1:5 fanout per bank "Heartbeat" monitor output VCC = 2.5V 0.2V Available in SSOP and QSOP packages
The FCT20805 is a 2.5 volt clock driver built using advanced CMOS technology. The device consists of two banks of drivers, each with a 1:5 fanout and its own output enable control. The device has a "heartbeat" monitor for diagnostics and PLL driving. The MON output is identical to all other outputs and complies with the output specifications in this document. The FCT20805 offers low capacitance inputs. The FCT20805 is designed for high speed clock distribution where signal quality and skew are critical. The FCT20805 also allows single point-to-point transmission line driving in applications such as address distribution, where one signal must be distributed to multiple recievers with low skew and high signal quality.
FUNCTIONAL BLOCK DIAGRAM
PIN CONFIGURATION
OEA INA 5 OA1 - OA5
VCCA OA1 OA2 OA3 GNDA OA4
1 2 3 4 5 6 7 8 9 10
20 19 18 17 16 15 14 13 12 11
VCCB OB1 OB2 OB3 GNDB OB4 OB5 MON OEB INB
INB OEB
5
OB1 - OB5
OA5 GNDQ OEA
MON
INA
SSOP/ QSOP TOP VIEW
INDUSTRIAL TEMPERATURE RANGE
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c 2003 Integrated Device Technology, Inc.
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
FEBRUARY 2003
DSC-6172/7
IDT49FCT20805 2.5V CMOS DUAL 1-TO-5 CLOCK DRIVER
INDUSTRIAL TEMPERATURE RANGE
ABSOLUTE MAXIMUM RATINGS(1)
Symbol VCC VI VO TJ TSTG Description Input Power Supply Voltage Input Voltage Output Voltage Junction Temperature Storage Temperature Max -0.5 to +4.6 -0.5 to +5.5 -0.5 to VCC+0.5 150 -65 to +165 Unit V V V C C
PIN DESCRIPTION
Pin Names OEA, OEB INA, INB OAn, OBn MON Clock Inputs Clock Outputs Monitor Output Description 3-State Output Enable Inputs (Active LOW)
NOTE: 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.
FUNCTION TABLE (1)
Inputs OEA, OEB L L H H INA, INB L H L H OAn, OBn L H Z Z Outputs MON L H L H
CAPACITANCE (TA = +25 C, f = 1.0MHz)
O
Symbol CIN COUT
Parameter(1) Input Capacitance Output Capacitance
Conditions VIN = 0V VOUT = 0V
Typ. 3 --
Max. 4 6
Unit pF pF
NOTE: 1. H = HIGH L = LOW Z = High-Impedance
NOTE: 1. This parameter is measured at characterization but not tested.
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified Industrial: TA = -40C to +85C, VCC = 2.5V 0.2V
Symbol VIH VIL IIH IIL IOZH IOZL VIK IODH IODL IOS VOH VOL Parameter Input HIGH Level Input LOW Level Input HIGH Current Input LOW Current High Impedance Output Current (3-State Outputs Pins) Clamp Diode Voltage Output HIGH Current Output LOW Current Short Circuit Current Output HIGH Voltage Output LOW Voltage VCC = Min., IIN = -18mA VCC = 2.5V, VIN = VIH or VIL, VCC = Max., VO = VCC = Min. VIN = VIH or VIL VCC = Min. VIN = VIH or VIL GND(3,4) IOH = -8mA IOH = -100A IOL = 8mA IOL = 100A VO = 1.25V(3,4) VCC = 2.5V, VIN = VIH or VIL, VO = 1.25V(3,4) VCC = Max. VCC = Max. VCC = Max. VI = 5.5V VI = GND VO = VCC VO = GND Test Conditions(1) Min. 1.7 -0.5 -- -- -- -- -- -15 25 -30 1.7(5) VCC - 0.2 -- -- Typ.(2) -- -- -- -- -- -- -0.7 -35 55 -50 -- -- 0.2 -- Max. 5.5 0.7 1 1 1 1 -1.2 -90 100 -120 -- -- 0.4 0.2 V V mA mA mA V A Unit V 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, 25C 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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IDT49FCT20805 2.5V CMOS DUAL 1-TO-5 CLOCK DRIVER
INDUSTRIAL TEMPERATURE RANGE
POWER SUPPLY CHARACTERISTICS
Symbol ICCL ICCH ICCZ ICC ICCD Parameter Quiescent Power Supply Current Test Conditions(1) VCC = Max. VIN = GND or VCC VCC = Max. VIN = VCC -0.6V VCC = Max. CL = 15pF All Outputs Toggling VCC = Max. CL = 15pF All Outputs Toggling fi = 133MHz VCC = Max. CL = 15pF All Outputs Toggling fi = 166MHz VIN = VCC VIN = GND VIN = VCC VIN = GND VIN = VCC -0.6V VIN = GND VIN = VCC VIN = GND VIN = VCC -0.6V VIN = GND Min. -- Typ.(2) 0.1 Max. 20 Unit A
Power Supply Current per Input HIGH Dynamic Power Supply Current per Output(3) Total Power Supply Current(4)
-- --
35 65
250 100
A A/MHz
IC
-- -- -- --
100 100 115 115
125 125 mA 150 150
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 VCC = 2.5V, +25C ambient. This parameter is not directly testable, but is derived for use in Total Power Supply calculations. IC = IQUIESCENT + IINPUTS + IDYNAMIC IC = ICC + ICC DHNT + ICCD (fONO) 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) fO = Output Frequency NO = Number of Outputs at fO
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IDT49FCT20805 2.5V CMOS DUAL 1-TO-5 CLOCK DRIVER
INDUSTRIAL TEMPERATURE RANGE
SWITCHING CHARACTERISTICS OVER OPERATING RANGE(3,4)
Symbol tPLH tPHL tR tF tSK(O) tSK(P) tSK(PP) tPZL tPZH tPLZ tPHZ fMAX Parameter Propagation Delay INA to OAn, INB to OBn Output Rise Time (0.8V to 2V) Output Fall Time (2V to 0.8V) Same device output pin to pin skew(5) Pulse skew(6,9) Part to part skew(7) Output Enable Time OEA to OAn, OEB to OBn Output Disable Time OEA to OAn, OEB to OBn Input Frequency -- 133 MHz -- 5.2 ns Conditions(1) CL = 15pF f 133MHz -- -- -- -- -- -- 1.5 1.5 270 270 550 5.2 ns ns ps ps ps ns Min.(2) 1 Max. 3 Unit ns
Symbol tPLH tPHL tR tF tSK(O) tSK(P) tSK(PP) tPZL tPZH tPLZ tPHZ fMAX
Parameter Propagation Delay INA to OAn, INB to OBn Output Rise Time (0.7V to 1.7V) Output Fall Time (1.7V to 0.7V) Same device output pin to pin skew(5) Pulse skew(6,9) Part to part skew(7) Output Enable Time OEA to OAn, OEB to OBn Output Disable Time OEA to OAn, OEB to OBn Input Frequency
Conditions(1,8) CL = 15pF 133MHz f 166MHz
Min.(2) 0.5 -- -- -- -- -- -- -- --
Max. 2.5 1.25 1.25 200 270 550 5.2 5.2 166
Unit ns ns ns ps ps ps ns ns MHz
NOTES: 1. See test circuits and waveforms. 2. Minimum limits are guaranteed but not tested on Propagation Delays. 3. tPLH and tPHL are production tested. All other parameters guaranteed but not production tested. 4. 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. 5. Skew measured between all outputs under identical transitions and load conditions. 6. Skew measured is difference between propagation delay times tPHL and tPLH of same outputs under identical load conditions. 7. Part to part skew for all outputs given identical transitions and load conditions at identical VCC levels and temperature. 8. Airflow of 1m/s is recommended for frequencies above 133MHz. 9. This parameter is measured using f = 1MHz.
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IDT49FCT20805 2.5V CMOS DUAL 1-TO-5 CLOCK DRIVER
INDUSTRIAL TEMPERATURE RANGE
TEST CIRCUITS AND WAVEFORMS
4.6V VCC Open GND 500 VIN Pulse Generator RT D.U.T RL CL 500 VOUT
Enable and Disable Time Circuit
VCC
INPUT tPLH1 tPHL1
VIN Pulse Generator RT D.U.T RL
VOUT CL
OUTPUT 1 tSK(o) OUTPUT 2 tPLH2 tPHL2 tSK(o)
2.5V 1.25V 0V VOH 1.25V VOL VOH 1.25V VOL
tSK(o) = |tPLH2 - tPLH1| or |tPHL2 - tPHL1|
CL = 15pF Test Circuit
Output Skew - tSK(O)
SWITCH POSITION
Test Disable Low Enable Low Disable High Enable High Switch 4.6V GND
TEST CONDITIONS
Symbol CL RT RL tR / tF VCC = 2.5V 0.2V 15 ZOUT of pulse generator 33 1 (0V to 2.5V or 2.5V to 0V) Unit pF ns
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.
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IDT49FCT20805 2.5V CMOS DUAL 1-TO-5 CLOCK DRIVER
INDUSTRIAL TEMPERATURE RANGE
TEST CIRCUITS AND WAVEFORMS
ENABLE CONTROL INPUT tPZL OUTPUT NORMALLY SWITCH LOW CLOSED tPZH OUTPUT NORMALLY HIGH SWITCH OPEN 1.25V VOL VOH 1.25V
DISABLE 2.5V 1.25V 0V tPLZ VOH 0.3V tPHZ 0.3V VOH VOL VOL
INPUT tPLH1 PACKAGE 1 OUTPUT tSK(PP) PACKAGE 2 OUTPUT tPLH2 tPHL2 tSK(PP) tPHL1
2.5V 1.25V 0V VOH 1.25V VOL VOH 1.25V VOL
tSK(PP) = |tPLH2 - tPLH1| or |tPHL2 - tPHL1|
Enable and Disable Times
NOTE: 1. Diagram shown for input Control Enable-LOW and input Control Disable-HIGH
Part-to-Part Skew - tSK(PP)
Part-to-Part Skew is for the same package and speed grade.
2.5V INPUT tPLH OUTPUT tPHL VOH 1.7V 0.7V tR tF 1.25V VOL tSK(P) = |tPLH - tPLH| OUTPUT 1.25V 0V tPLH tPHL INPUT
2.5V 1.25V 0V VOH 1.25V VOL
Propagation Delay
Pulse Skew
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IDT49FCT20805 2.5V CMOS DUAL 1-TO-5 CLOCK DRIVER
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
IDT49FCT XXXX Device Type X Package X Process
I
-40C to +85C (Industrial)
PY Q 20805
Shrink Small Outline IC Quarter-size Small Outline IC 2.5V CMOS Dual 1-to-5 Clock Driver
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