1PS2011G 11/10/08
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 refl ections, thus eliminating
the need for an external terminating resistor.
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: –40°C to +85°C
• 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
Fast CMOS Non-Inverting Octal Buffer/
Line Drivers
PI74FCT244T/2244T
PI74FCT541T/2541T
08-0291
2PS2011G 11/10/08
PI74FCT244T/2244T
PI74FCT541T/2541T
Fast CMOS Non-Inverting Octal Buffer/Line Drivers
Product Pin Description
Pin Name Description
OEA, OEB 3-State Output Enable Inputs (Active LOW)
OEB(1) 3-State Output Enable Input (Active HIGH)
Dxx Inputs
Oxx Outputs
GND Ground
VCC Power
Truth Table
Inputs(1) Outputs(1)
OEAOEBOEB(2) D 244 541
LL H L L L
LL H H H H
HH L X Z Z
Notes:
1. H = High Voltage Level, X = Don't Care, L = Low
Voltage Level, Z = High Impedance
PI74FCT541/2541T Pin Confi guration
PI74FCT244/2244T Pin Confi guration
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
OEA
DA0
OB0
DA1
OB1
DA2
OB2
DA3
OB3
GND
Vcc
OEB
OA0
DB0
OA1
DB1
OA2
DB2
OA3
DB3
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
OEA
D0
D1
D2
D3
D4
D5
D6
D7
GND
Vcc
OEB
O0*
O1*
O2*
O3*
O4*
O5*
O6*
O7*
Block Diagrams
PI74FCT244/2244T PI74FCT541/2541T
OE
A
DA
0
OB
0
OB
1
DA
1
OB
2
DA
2
OB
3
DA
3
OA
0
DB
0
OE
B
*
OA
1
DB
1
OA
2
DB
2
OA
3
DB
3
*
OE
B
for 244T
Notes:
1. Only offered for PI74FCT244T
OEA
D0O0
OEB
D1O1
D2O2
D3O3
D4
D5O5
D6O6
D7O7
O4
08-0291
3PS2011G 11/10/08
PI74FCT244T/2244T
PI74FCT541T/2541T
Fast CMOS Non-Inverting Octal Buffer/Line Drivers
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
Note:
Stresses greater than those listed under MAX I MUM
RATINGS may cause permanent damage to the
device. This is a stress rating only and functional
op er a tion of the device at these or any other con-
di tions above those indicated in the operational
sections of this specifi cation is not implied. Exposure to
absolute maximum rating conditions for extended periods
may affect re li abil i ty.
DC Electrical Characteristics (Over the Operating Range, TA = –40°C to +85°C, VCC = 5.0V ± 5%)
Parameters De scrip tion Test Conditions(1) Min. Typ(2) Max. Units
VOH Output HIGH Voltage VCC = Min., VIN = VIH or VIL IOH = –15.0mA 2.4 3.0
V
VOL Output LOW Current VCC = Min., VIN = VIH or VIL IOL = 64mA 0.3 0.55
VOL Output LOW Current VCC = Min., VIN = VIH or VIL IOL = 12mA
(25Series) 0.3 0.50
VIH Input HIGH Voltage Guaranteed Logic HIGH Level 2.0
VIL Input LOW Voltage Guaranteed Logic LOW Level 0.8
IIH Input HIGH Current VCC = Max. VIN = VCC 1
A
IIL Input LOW Current VCC = Max. VIN = GND –1
IOZH High Impedance VCC = MAX.VOUT = 2.7V 1
IOZL Output Current VOUT = 0.5V –1
VIK Clamp Diode Voltage VCC = Min., IIN = –18mA –0.7 –1.2 V
IOFF Power Down Disable VCC = GND, VOUT = 4.5V 100 A
IOS Short Circuit Current VCC = Max.(3), VOUT = GND –60 –120 mA
VHInput Hysteresis 200
Notes:
1. For Max. or Min. conditions, use appropriate value specifi ed under Electrical Characteristics for the applicable device type.
2. Typical values are at Vcc = 5.0V, +25°C 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 = 25°C, f = 1 MHz)
Parameters(1) De scrip tion Test Conditions Typ. Max. Units
CIN Input Capacitance VIN = 0V 6 10 pF
COUT Output Capacitance VOUT = 0V 8 12
Notes:
1. This parameter is determined by device characterization but is not production tested.
Storage Temperature ............................................................. –65°C to +150°C
Ambient Temperature with Power Applied .............................-40°C to +85°C
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
08-0291
4PS2011G 11/10/08
PI74FCT244T/2244T
PI74FCT541T/2541T
Fast CMOS Non-Inverting Octal Buffer/Line Drivers
Power Supply Characteristics
Parameters De scrip tion Test Conditions(1) Min. Typ(2) Max. Units
ICC Quiescent Power
Supply Current VCC = Max. VIN = GND or VCC 0.1 500 A
ICC Supply Current per
Input @ TTL HIGH VCC = Max. VIN = 3.4V(3) 0.5 2.5 mA
ICCD Supply Current per
Input per MHz(4)
VCC = Max.,
Outputs Open
OEA = OEB = GND or
OEA = GND, OEB = VCC
One Bit Toggling
50% Duty Cycle
VIN = VCC
VIN = GND 0.15 0.25 mA/
MHz
ICTotal Power Supply
Current(6)
VCC = Max.,
Outputs Open
fI = 10 MHZ
50% Duty Cycle
OEA = OEB = GND or
OEA = GND, OEB = VCC
One Bit Toggling
VIN = VCC
VIN = GND 1.5 3.5(5)
mA
VIN = 3.4V
VIN = GND 1.8 4.5(5)
VCC = Max.,
Outputs Open
fI = 2.5 MHZ
50% Duty Cycle
OEA = OEB = GND or
OEA = GND, OEB = VCC
Eight Bits Toggling
VIN = VCC
VIN = GND 3.0 6.0(5)
VIN = 3.4V
VIN = GND 5.0 14.0(5)
Notes:
1. For Max. or Min. conditions, use appropriate value specifi ed under Electrical Characteristics for the applicable device.
2. Typical values are at Vcc = 5.0V, +25°C 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)
I
CC = Quiescent Current
ICC = Power Supply Current for a TTL High Input (VIN = 3.4V)
D
H = Duty Cycle for TTL Inputs High
N
T = Number of TTL Inputs at DH
ICCD = Dynamic Current Caused by an Input Transition Pair (HLH or LHL)
f
CP = Clock Frequency for Register Devices (Zero for Non-Register Devices)
f
I = Input Frequency
N
I = Number of Inputs at fI
All currents are in milliamps and all frequencies are in megahertz.
08-0291
5PS2011G 11/10/08
PI74FCT244T/2244T
PI74FCT541T/2541T
Fast CMOS Non-Inverting Octal Buffer/Line Drivers
PI74FCT244/2244T Switching Characteristics over Operating Range
Param-
eters De scrip tion Condi-
tions(1)
244T/2244T 244AT/2244AT 244CT/2244CT 244DT
Units
Com. Com. Com. Com.
Min Max Min Max Min Max Min Max
tPLH
tPHL Propagation Delay(2)
CL = 50pF
1.5 6.5 1.5 4.8 1.5 4.1 1.5 3.6 ns
tPZH
tPZL
Output Enable Time
OEX to ON1.5 8.0 1.5 6.2 1.5 5.8 1.5 4.8 ns
tPHZ
tPLZ
Output Disable
Time(3)
OEX to ON
1.5 7.0 1.5 5.6 1.5 5.2 1.5 4.0 ns
Notes:
1. For Max. or Min. conditions, use appropriate value specifi ed 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
Parameters De scrip tion Conditions(1)
541T/2541T 541AT/
2541AT 541CT/
2541CT 541DT
Units
Com. Com. Com. Com.
Min Max Min Max Min Max Min Max
tPLH
tPHL
Propagation Delay(2)
DN to ON
CL = 50pF
RL = 500
1.5 6.0 1.5 4.8 1.5 4.1 1.5 3.8 ns
tPZH
tPZL
Output Enable Time
OEX to ON1.5 9.5 1.5 6.2 1.5 5.8 1.5 5.2 ns
tPHZ
tPLZ
Output Disable
Time(3)
OEX to ON
1.5 6.5 1.5 5.6 1.5 5.2 1.5 5.2 ns
Notes:
1. For Max. or Min. conditions, use appropriate value specifi ed 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.
08-0291
6PS2011G 11/10/08
PI74FCT244T/2244T
PI74FCT541T/2541T
Fast CMOS Non-Inverting Octal Buffer/Line Drivers
Ordering Information: PI74FCT244T
Ordering Code Package Code Speed Grade Package Description
PI74FCT244TH H Blank 20-pin 209-mil wide plastic SSOP
PI74FCT244THE H Blank Pb-free & Green, 20-pin 209-mil wide plastic SSOP
PI74FCT244TL L Blank 20-pin 173-mil wide plastic TSSOP
PI74FCT244TLE L Blank Pb-free & Green, 20-pin 173-mil wide plastic TSSOP
PI74FCT244ATQE Q A Pb-free & Green, 20-pin 150-mil wide plastic QSOP
PI74FCT244ATSE S A Pb-free & Green, 20-pin 300-mil wide plastic SOIC
PI74FCT244CTH H C 20-pin 209-mil wide plastic SSOP
PI74FCT244CTHE H C Pb-free & Green, 20-pin 209-mil wide plastic SSOP
PI74FCT244DTQ Q D 20-pin 150-mil wide plastic QSOP
PI74FCT244DTSE S D Pb-free & Green, 20-pin 300-mil wide plastic SOIC
PI74FCT244TQE Q Blank Pb-free & Green, 20-pin 150-mil wide plastic QSOP
PI74FCT244CTQE Q C Pb-free & Green, 20-pin 150-mil wide plastic QSOP
PI74FCT244DTQE Q C Pb-free & Green, 20-pin 150-mil wide plastic QSOP
PI74FCT244CTSE S C Pb-free & Green, 20-pin 300-mil wide plastic SOIC
PI74FCT244TQE Q Pb-free & Green, 20-pin 150-mil wide plastic QSOP
PI74FCT244TQSE Q Pb-free & Green, 20-pin, Tape/Reel, 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 suffi x = Tape/Reel
08-0291
7PS2011G 11/10/08
PI74FCT244T/2244T
PI74FCT541T/2541T
Fast CMOS Non-Inverting Octal Buffer/Line Drivers
Ordering Information: PI74FCT2541T
Ordering Code Package Code Speed Grade Package Description
PI74FCT2541TQ Q Blank 20-pin 150 mil wide plastic QSOP
PI74FCT2541TSE S Blank Pb-free & Green, 20-pin 300 mil wide plastic SOIC
PI74FCT2541ATQ Q A 20-pin 150 mil wide plastic QSOP
PI74FCT2541ATS S A 20-pin 300 mil wide plastic SOIC
PI74FCT2541ATSE S A Pb-free & Green, 20-pin 300 mil wide plastic SOIC
PI74FCT2541ATQE Q A 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 suffi x = Tape/Reel
Ordering Information: PI74FCT541T
Ordering Code Package Code Speed Grade Package Description
PI74FCT541ATQE Q A Pb-free & Green, 20-pin 150-mil wide plastic QSOP
PI74FCT541CTLE L C Pb-free & Green, 20-pin 173-mil wide plastic TSSOP
PI74FCT541TQE Q Blank Pb-free & Green, 20-pin 150-mil wide plastic QSOP
PI74FCT541TS S Blank 20-pin 300-mil wide plastic SOIC
PI74FCT541ATQ Q A 20-pin 150-mil wide plastic QSOP
PI74FCT541ATS S A 20-pin 300-mil wide plastic SOIC
PI74FCT541ATSE S A Pb-free & Green, 20-pin 300-mil wide plastic SOIC
PI74FCT541TSE T Blank Pb-free & Green, 20-pin 300-mil wide plastic SOIC
Ordering Information: PI74FCT2244T
Ordering Code Package Code Speed Grade Package Description
PI74FCT2244TQE Q Blank Pb-free & Green, 20-pin 150 mil wide plastic QSOP
PI74FCT2244TSE S Blank Pb-free & Green, 20-pin 300 mil wide plastic SOIC
PI74FCT2244ATLE L A Pb-free & Green, 20-pin 173 mil wide plastic TSSOP
PI74FCT2244ATQE Q A Pb-free & Green, 20-pin 150 mil wide plastic QSOP
PI74FCT2244ATSE S A Pb-free & Green, 20-pin 300 mil wide plastic SOIC
PI74FCT2244CTQE Q C Pb-free & Green, 20-pin 150 mil wide plastic QSOP
08-0291
8PS2011G 11/10/08
PI74FCT244T/2244T
PI74FCT541T/2541T
Fast CMOS Non-Inverting Octal Buffer/Line Drivers
Pericom Semiconductor Corporation • 1-800-435-2336 • www.pericom.com
08-0291
