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PI74FCT244T/2244T PI74FCT541T/2541T
Fast CMOS Octal Buffer/Line Drivers
Features
* PI74FCT244/541T and PI74FCT2244/2541T are pin compatible with bipolar Fast Series at a higher speed and lower power consumption * 25 series resistor on all outputs (FCT2XXX only) * TTL input and output levels * Low ground bounce outputs * Extremely low static power * Hysteresis on all inputs * Industrial operating temperature range: -40C to +85C * Packaging (Pb-free & Green available): PI74FCT244T - 20-pin 173-mil wide plastic TSSOP (L) - 20-pin 209-mil wide plastic SSOP (H) - 20-pin 150-mil wide plastic QSOP (Q) - 20-pin 300-mil wide plastic SOIC (S) PI74FCT2244T - 20-pin 173-mil wide plastic TSSOP (L) - 20-pin 150-mil wide plastic QSOP (Q) - 20-pin 300-mil wide plastic SOIC (S) PI74FCT541T (Pb-free & Green) - 20-pin 173-mil wide plastic TSSOP (L) - 20-pin 150-mil wide plastic QSOP (Q) - 20-pin 300-mil wide plastic SOIC (S) PI74FCT2541T - 20-pin 150-mil wide plastic QSOP (Q) - 20-pin 300-mil wide plastic SOIC (S) * Device models available upon request
Description
Pericom Semiconductor's PI74FCT244T/541T and P174FCT2244/ 2541T are 8-bit wide driver circuits, designed to be used in applications requiring high-speed and high-output drive. Ideal applications would include bus drivers, memory drivers, address drivers, and system clock drivers. The PI74FCT541 and 2541T provide similar driver capabilities, but have their pins physically grouped by function. All inputs are located on one side of the package, while outputs are on the opposite side, allowing for a much simpler and denser board layout. All PI74FCT2XXX devices have a built-in 25 series resistor on all outputs to reduce noise because of reflections, thus eliminating the need for an external terminating resistor.
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PI74FCT244T/2244T PI74FCT541T/2541T Octal Buffer/Line Drivers Block Diagrams
PI74FCT244/2244T
OEA
OEB* DA0 OB0 DA1 OB1 OA0 DB0
OA1 DB1
PI74FCT541/2541T
OEA
OEB
D0
O0
D1 D2 D3
O1
O2
O3
DA2 OB2 DA3 OB3
OA2
D4
DB2
O4 O5 O6 O7
D5
OA3
D6
DB3
D7
*OEB for 244T
Product Pin Description
Pin Name OEA, OEB OEB(1) Dxx Oxx GND VCC Description 3-State Output Enable Inputs (Active LOW) 3-State Output Enable Input (Active HIGH) Inputs Outputs Ground Power
Truth Table
OEA L L H
Inputs(1) OEB OEB(2) L H L H H L
Outputs(1) D L H X 244 L H Z 541 L H Z
Notes: 1. Only offered for PI74FCT244T
Notes: 1. H = High Voltage Level, X = Don't Care, L = Low Voltage Level, Z = High Impedance 2. OEB for 241 only.
PI74FCT244/2244T Pin Configuration
OEA DA0 OB0 DA1 OB1 DA2 OB2 DA3 OB3 GND
1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11
PI74FCT541/2541T Pin Configuration
OEA D0 D1 D2 D3 D4 D5 D6 D7 GND
1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11
Vcc OEB OA0 DB0 OA1 DB1 OA2 DB2 OA3 DB3
Vcc OEB O0* O1* O2* O3* O4* O5* O6* O7*
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PI74FCT244T/2244T PI74FCT541T/2541T Octal Buffer/Line Drivers Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.) Storage Temperature ............................................................. -65C to +150C Ambient Temperature with Power Applied .............................-40C to +85C Supply Voltage to Ground Potential (Inputs & Vcc Only) ...... -0.5V to +7.0V Supply Voltage to Ground Potential (Outputs & D/O Only) ... -0.5V to +7.0V DC Input Voltage ..................................................................... -0.5V to +7.0V DC Output Current................................................................................ 120mA Power Dissipation .................................................................................... 0.5W
Note: Stresses greater than those listed under 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.
DC Electrical Characteristics (Over the Operating Range, TA = -40C to +85C, VCC = 5.0V 5%) Parameters VOH VOL VOL VIH VIL IIH IIL IOZH IOZL VIK IOFF IOS VH Description Output HIGH Voltage Output LOW Current Output LOW Current Input HIGH Voltage Input LOW Voltage Input HIGH Current Input LOW Current High Impedance Output Current Clamp Diode Voltage Power Down Disable Short Circuit Current Input Hysteresis Test Conditions(1) VCC = Min., VIN = VIH or VIL VCC = Min., VIN = VIH or VIL VCC = Min., VIN = VIH or VIL Guaranteed Logic HIGH Level Guaranteed Logic LOW Level VCC = Max. VCC = Max. VCC = MAX. VCC = Min., IIN = -18mA VCC = GND, VOUT = 4.5V VCC = Max.(3), VOUT = GND -60 -120 200 VIN = VCC VIN = GND VOUT = 2.7V VOUT = 0.5V -0.7 IOH = -15.0mA IOL = 64mA IOL = 12mA (25Series) 2.0 0.8 1 -1 1 -1 -1.2 100 V A mA A Min. 2.4 Typ(2) 3.0 0.3 0.3 0.55 0.50 V Max. Units
Notes: 1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type. 2. Typical values are at Vcc = 5.0V, +25C ambient and maximum loading. 3. Not more than one output should be shorted at one time. Duration of the test should not exceed one second.
Capacitance (TA = 25C, f = 1 MHz)
Parameters(1) CIN COUT Description Input Capacitance Output Capacitance Test Conditions VIN = 0V VOUT = 0V Typ. 6 8 Max. 10 12 Units pF
Notes: 1. This parameter is determined by device characterization but is not production tested.
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PI74FCT244T/2244T PI74FCT541T/2541T Octal Buffer/Line Drivers Power Supply Characteristics
Parameters ICC ICC Description Quiescent Power Supply Current Supply Current per Input @ TTL HIGH VCC = Max. VCC = Max. VCC = Max., Outputs Open OEA = OEB = GND or OEA = GND, OEB = VCC One Bit Toggling 50% Duty Cycle VCC = Max., Outputs Open fI = 10 MHZ 50% Duty Cycle OEA = OEB = GND or OEA = GND, OEB = VCC One Bit Toggling VCC = Max., Outputs Open fI = 2.5 MHZ 50% Duty Cycle OEA = OEB = GND or OEA = GND, OEB = VCC Eight Bits Toggling
Test Conditions(1) VIN = GND or VCC VIN = 3.4V(3)
Min.
Typ(2) 0.1 0.5
Max. 500 2.5
Units A mA
ICCD
Supply Current per Input per MHz(4)
VIN = VCC VIN = GND
0.15
0.25
mA/ MHz
VIN = VCC VIN = GND VIN = 3.4V VIN = GND VIN = VCC VIN = GND VIN = 3.4V VIN = GND
1.5
3.5(5)
1.8
4.5(5) mA
IC
Total Power Supply Current(6)
3.0
6.0(5)
5.0
14.0(5)
Notes: 1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device. 2. Typical values are at Vcc = 5.0V, +25C ambient. 3. Per TTL driven input (VIN = 3.4V); all other inputs at Vcc or GND. 4. This parameter is not directly testable, but is derived for use in Total Power Supply Calculations. 5. Values for these conditions are examples of the Icc formula. These limits are guaranteed but not tested. 6. IC = IQUIESCENT + IINPUTS + IDYNAMIC IC = ICC + ICC DHNT + ICCD (fCP/2 + fINI) ICC = Quiescent Current ICC = Power Supply Current for a TTL High Input (VIN = 3.4V) 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) fCP = Clock Frequency for Register Devices (Zero for Non-Register Devices) fI = Input Frequency NI = Number of Inputs at fI All currents are in milliamps and all frequencies are in megahertz.
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PI74FCT244T/2244T PI74FCT541T/2541T Octal Buffer/Line Drivers PI74FCT244/2244T Switching Characteristics over Operating Range
Parameters tPLH tPHL tPZH tPZL tPHZ tPLZ Description Propagation Delay(2) Output Enable Time OEX to ON Output Disable Time(3) OEX to ON CL = 50pF Conditions(1) 244T/2244T Com. Min 1.5 1.5 1.5 Max 6.5 8.0 7.0 1.5 1.5 1.5 244AT/2244AT Com. Min Max 4.8 6.2 5.6 1.5 1.5 1.5 244CT/2244CT Com. Min Max 4.1 5.8 5.2 244DT Com. Min 1.5 1.5 1.5 Max 3.6 4.8 4.0 Units ns ns ns
Notes: 1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type. 2. Minimum limits are guaranteed but not tested on Propagation Delays. 3. This parameter is guaranteed but not production tested.
PI74FCT541/2541T Switching Characteristics over Operating Range
541T/2541T Parameters tPLH tPHL tPZH tPZL tPHZ tPLZ Description Propagation DN to ON Delay(2) CL = 50pF RL = 500 Conditions(1) Com. Min 1.5 1.5 1.5 Max 6.0 9.5 6.5 541AT/ 2541AT Com. Min 1.5 1.5 1.5 Max 4.8 6.2 5.6 541CT/ 2541CT Com. Min 1.5 1.5 1.5 Max 4.1 5.8 5.2 541DT Com. Min 1.5 1.5 1.5 Max 3.8 5.2 5.2 ns ns ns Units
Output Enable Time OEX to ON Output Disable Time(3) OEX to ON
Notes: 1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type. 2. Minimum limits are guaranteed but not tested on Propagation Delays. 3. This parameter is guaranteed but not production tested.
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PI74FCT244T/2244T PI74FCT541T/2541T Octal Buffer/Line Drivers Ordering Information: PI74FCT244T
Ordering Code PI74FCT244TH PI74FCT244THE PI74FCT244TL PI74FCT244TLE PI74FCT244TQ PI74FCT244TS PI74FCT244ATL PI74FCT244ATQ PI74FCT244ATQE PI74FCT244ATSE PI74FCT244CTH PI74FCT244CTHE PI74FCT244CTL PI74FCT244CTQ PI74FCT244CTS PI74FCT244DTQ PI74FCT244DTS PI74FCT244DTSE PI74FCT244TQE PI74FCT244CTQE PI74FCT244DTQE PI74FCT244CTSE PI74FCT244ATS PI74FCT244TQE PI74FCT244TQSE Package Code H H L L Q S L Q Q S H H L Q S Q S S Q Q Q S S Q Q Speed Grade Blank Blank Blank Blank Blank Blank A A A A C C C C C D D D Blank C C C A Package Description 20-pin 209-mil wide plastic SSOP Pb-free & Green, 20-pin 209-mil wide plastic SSOP 20-pin 173-mil wide plastic TSSOP Pb-free & Green, 20-pin 173-mil wide plastic TSSOP 20-pin 150-mil wide plastic QSOP 20-pin 300-mil wide plastic SOIC 20-pin 173-mil wide plastic TSSOP 20-pin 150-mil wide plastic QSOP Pb-free & Green, 20-pin 150-mil wide plastic QSOP Pb-free & Green, 20-pin 300-mil wide plastic SOIC 20-pin 209-mil wide plastic SSOP Pb-free & Green, 20-pin 209-mil wide plastic SSOP 20-pin 173-mil wide plastic TSSOP 20-pin 150-mil wide plastic QSOP 20-pin 300-mil wide plastic SOIC 20-pin 150-mil wide plastic QSOP 20-pin 300-mil wide plastic SOIC Pb-free & Green, 20-pin 300-mil wide plastic SOIC Pb-free & Green, 20-pin 150-mil wide plastic QSOP Pb-free & Green, 20-pin 150-mil wide plastic QSOP Pb-free & Green, 20-pin 150-mil wide plastic QSOP Pb-free & Green, 20-pin 300-mil wide plastic SOIC 20-pin 300-mil wide plastic SOIC Pb-free & Green, 20-pin 150-mil wide plastic QSOP Pb-free & Green, 20-pin, Tape/Reel, 150-mil wide plastic QSOP
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PI74FCT244T/2244T PI74FCT541T/2541T Octal Buffer/Line Drivers Ordering Information: PI74FCT2244T
Ordering Code PI74FCT2244TQ PI74FCT2244TQE PI74FCT2244TS PI74FCT2244TSE PI74FCT2244ATL PI74FCT2244ATLE PI74FCT2244ATQ PI74FCT2244ATQE PI74FCT2244ATS PI74FCT2244ATSE PI74FCT2244CTQ PI74FCT2244CTQE Package Code Q Q S S L L Q Q S S Q Q Speed Grade Blank Blank Blank Blank A A A A A A C C Package Description 20-pin 150 mil wide plastic QSOP Pb-free & Green, 20-pin 150 mil wide plastic QSOP 20-pin 300 mil wide plastic SOIC Pb-free & Green, 20-pin 300 mil wide plastic SOIC 20-pin 173 mil wide plastic TSSOP Pb-free & Green, 20-pin 173 mil wide plastic TSSOP 20-pin 150 mil wide plastic QSOP Pb-free & Green, 20-pin 150 mil wide plastic QSOP 20-pin 300 mil wide plastic SOIC Pb-free & Green, 20-pin 300 mil wide plastic SOIC 20-pin 150 mil wide plastic QSOP Pb-free & Green, 20-pin 150 mil wide plastic QSOP
Ordering Information: PI74FCT541T
Ordering Code PI74FCT541ATQE PI74FCT541CTLE PI74FCT541TQ PI74FCT541TQE PI74FCT541TS PI74FCT541ATQ PI74FCT541ATS PI74FCT541ATSE PI74FCT541CTL PI74FCT541TSE Package Code Q L Q Q S Q S S L T Speed Grade A C Blank Blank Blank A A A C Blank Package Description Pb-free & Green, 20-pin 150-mil wide plastic QSOP Pb-free & Green, 20-pin 173-mil wide plastic TSSOP 20-pin 150-mil wide plastic QSOP Pb-free & Green, 20-pin 150-mil wide plastic QSOP 20-pin 300-mil wide plastic SOIC 20-pin 150-mil wide plastic QSOP 20-pin 300-mil wide plastic SOIC Pb-free & Green, 20-pin 300-mil wide plastic SOIC 20-pin 173-mil wide plastic TSSOP Pb-free & Green, 20-pin 300-mil wide plastic SOIC
Ordering Information: PI74FCT2541T
Ordering Code PI74FCT2541TQ PI74FCT2541TS PI74FCT2541TSE PI74FCT2541ATQ PI74FCT2541ATS PI74FCT2541ATSE PI74FCT2541ATQE Package Code Q S S Q S S Q Speed Grade Blank Blank Blank A A A A Package Description 20-pin 150 mil wide plastic QSOP 20-pin 300 mil wide plastic SOIC Pb-free & Green, 20-pin 300 mil wide plastic SOIC 20-pin 150 mil wide plastic QSOP 20-pin 300 mil wide plastic SOIC Pb-free & Green, 20-pin 300 mil wide plastic SOIC Pb-free & Green, 20-pin 150 mil wide plastic QSOP
Notes: * Thermal characteristics can be found on the company web site at www.pericom.com/packaging/ * E = Pb-free and Green * Adding an X suffix = Tape/Reel
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PI74FCT244T/2244T PI74FCT541T/2541T Octal Buffer/Line Drivers
Pericom Semiconductor Corporation * 1-800-435-2336 * www.pericom.com
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