PERICOM PI74FCT2640T

PI74FCT245T/640T/645T
PI74FCT2245T/2640T/2645T
Ω Series)
(25Ω
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Fast CMOS Octal
Bidirectional Transceivers
Product Features
Product Description
• PI74FCT245/640/645T and PI74FCT2245/2640T/2645T are pin
compatible with bipolar FAST™ Series at a higher speed and
lower power consumption
• 25 Ohm 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
• Packages available:
– 20-pin 173 mil wide plastic TSSOP (L)
– 20-pin 300 mil wide plastic DIP (P)
– 20-pin 150 mil wide plastic QSOP (Q)
– 20-pin 150 mil wide plastic TQSOP (R)
– 20-pin 300 mil wide plastic SOIC (S)
– 20-pin 209 mil wide plastic SSOP (H)
• Device models available on request
Pericom Semiconductor’s PI74FCT series of logic circuits are
produced using the Company’s advanced 0.6/0.8 micron CMOS
technology, achieving industry leading speed grades. All
PI74FCT2XXX devices have a built-in 25 Ohm series resistor on all
outputs to reduce noise because of reflections, thus eliminating the
need for an external terminating resistor.
The PI74FCT245T/640T/645T and PI74FCT2245T/2640T/2645T are
8-bit wide octal buffer bidirectional transceivers designed for
asynchronous two-way communication between data buses. The
transmit/receive (T/R) input determines the direction of data flow
through the bidirectional transceiver. Transmit (active HIGH) enables
data from A ports to B ports, and receive (active LOW) from B ports
to A ports. The output enable (OE) input, when HIGH, disables both
A and B ports by placing them in HIGH Z condition.
Product Pin Configuration
T/R
A0
A1
A2
A3
A4
A5
A6
A7
GND
Logic Block Diagram
T/R
OE
A0
B0
1
20
2
19
3
18
4 20-Pin 17
5 L,P,Q 16
6 R,S,H 15
7
14
8
13
9
12
10
11
Vcc
OE
B0
B1
B2
B3
B4
B5
B6
B7
A1
Product Pin Description
B1
Pin Name
OE
T/R
A0-A7
B0-B7
GND
VCC
A2
B2
A3
B3
A4
B4
Description
3-State Output Enable Inputs (Active LOW)
Transmit/Receive Input
Side A Inputs or 3-State Outputs
Side B Inputs or 3-State Outputs
Ground
Power
Truth Table(1)
A5
B5
Inputs
OE
T/R
L
L
L
H
H
X
A6
B6
A7
B7
1.
FCT245, 2245, 645, 2645 are non-inverting options.
FCT640 & FCT2640 are inverting options.
2.
1
Outputs
Bus B Data to Bus A(2)
Bus A Data to Bus B(2)
High Z State
H = High Voltage Level, X = Don't Care, L = Low
Voltage Level, Z = High Impedance
640 is inverting from input to output.
PS2012B
09/22/99
PI74FCT245T/640T/645T
25 Ohm Series PI74FCT2245T/2640T/2645T
Octal BidirectionalTransceivers
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Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not 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
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 = –40°C to +85°C, VCC = 5.0V ±5%)
Parameters Description
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
V
VOL
Output LOW Current
VCC = Min., VIN = VIH or VIL
IOL = 12mA (25Ω Series)
0.3
0.50
V
VIH
Input HIGH Voltage
Guaranteed Logic HIGH Level
VIL
Input LOW Voltage
Guaranteed Logic LOW Level
IIH
Input HIGH Current
(Except I/O pins) VCC = Max.
IIL
Input LOW Current
IIH
2.0
V
0.8
V
VIN = VCC
1
µA
(Except I/O pins) VCC = Max.
VIN = GND
–1
µA
Input HIGH Current
(I/O pins Only) VCC = Max.
VIN = VCC
1
µA
IIL
Input LOW Current
(I/O pins Only) VCC = Max.
VIN = GND
–1
µA
IOZH
High Impedance
VCC = MAX.
VOUT = 2.7V
1
µA
IOZL
Output Current
VOUT = 0.5V
–1
µA
VIK
Clamp Diode Voltage
VCC = Min., IIN = –18 mA
–0.7
–1.2
V
IOFF
Power Down Disable
VCC = GND, VOUT = 4.5V
—
—
100
µA
IOS
Short Circuit Current
VCC = Max.(3), VOUT = GND
–60
–120
mA
VH
Input Hysteresis
200
mV
Capacitance (TA = 25°C, f = 1 MHz)
Parameters(4)
Description
Test Conditions
Typ.
Max.
Units
CIN
Input Capacitance
VIN = 0V
6
10
pF
C OUT
Output Capacitance
VOUT = 0V
8
12
pF
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, +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.
4. This parameter is determined by device characterization but is not production tested.
2
PS2012B
09/22/99
PI74FCT245T/640T/645T
25 Ohm Series PI74FCT2245T/2640T/2645T
Octal BidirectionalTransceivers
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Power Supply Characteristics
Test Conditions(1)
Parameters Description
Min.
Typ(2)
Max.
Units
ICC
Quiescent Power
Supply Current
VCC = Max.
VIN = GND or VCC
0.1
500
µA
∆ICC
Supply Current per
Input @ TTL HIGH
VCC = Max.,
VIN = 3.4V(3)
0.5
2.0
mA
ICCD
Supply Current per
Input per MHz(4)
VCC = Max.,
Outputs Open
OE = GND
T/R = GND or VCC
One Input Toggling
50% Duty Cycle
VIN = VCC
VIN = GND
0.15
0.25
mA/
MHz
IC
Total Power Supply
Current(6)
VCC = Max.,
Outputs Open
fI = 10 MHZ
50% Duty Cycle
T/R = OE = GND
One Bit Toggling
VCC = Max.,
Outputs Open
fI = 2.5 MHZ
50% Duty Cycle
T/R = OE = GND
Eight Bits Toggling
VIN = VCC
VIN = GND
1.5
3.5(5)
mA
VIN = 3.4V
VIN = GND
1.8
4.5(5)
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 specified 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 + DICC 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.
3
PS2012B
09/22/99
PI74FCT245T/640T/645T
25 Ohm Series PI74FCT2245T/2640T/2645T
Octal BidirectionalTransceivers
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PI74FCT245T/2245T Switching Characteristics over Operating Range
Parameters Description
t PLH
t PHL
t PZH
t PZL
t PHZ
t PLZ
t PZH
t PZL
t PHZ
t PLZ
Propagation Delay
A to B, B to A
Output Enable Time
OE to A or B
Output Disable Time
OE to A or B(3)
Output Enable Time
T/R to A or B
Output Disable Time(3)
T/R to A or B(3)
Conditions(1)
CL = 50 pF
RL = 500 Ohm
245T/2245T
Com.
Min.
Max.
245AT/2245AT 245CT/2245CT
Com.
Com.
Min.
Max.
Min.
Max.
245DT
Com.
Min
Max. Unit
1.5
7.0
1.5
4.6
1.5
4.1
1.5
3.8
ns
1.5
9.0
1.5
6.2
1.5
5.8
1.5
5.0
ns
1.5
7.5
1.5
5.0
1.5
4.8
1.5
4.3
ns
1.5
9.0
1.5
6.2
1.5
5.8
1.5
5.0
ns
1.5
7.5
1.5
5.0
1.5
4.8
1.5
4.3
ns
PI74FCT640T/2640T Switching Characteristics over Operating Range
Parameters Description
t PLH
t PHL
t PZH
t PZL
t PHZ
t PLZ
t PZH
t PZL
t PHZ
t PLZ
Propagation Delay
A to B, B to A
Output Enable Time
OE to A or B
Output Disable Time
OE to A or B(3)
Output Enable Time
T/R to A or B
Output Disable Time(3)
T/R to A or B(3)
Conditions(1)
CL = 50 pF
RL = 500 Ohm
640T/2640T
Com.
Min.
Max.
640AT/2640AT 640CT/2640CT
Com.
Com.
Min.
Max.
Min.
Max.
640DT
Com.
Min.
Max. Unit
2.0
7.0
1.5
5.0
1.5
4.4
1.5
3.7
ns
2.0
13.0
1.5
6.2
1.5
5.8
1.5
5.0
ns
2.0
10.0
1.5
5.0
1.5
4.8
1.5
4.3
ns
2.0
13.0
1.5
6.2
1.5
5.8
1.5
5.0
ns
2.0
10.0
1.5
5.0
1.5
4.8
1.5
4.3
ns
PI74FCT645T/2645T Switching Characteristics over Operating Range
Parameters Description
t PLH
t PHL
t PZH
t PZL
t PHZ
t PLZ
t PZH
t PZL
t PHZ
t PLZ
Propagation Delay
A to B, B to A
Output Enable Time
OE to A or B
Output Disable Time
OE to A or B(3)
Output Enable Time
T/R to A or B
Output Disable Time(3)
T/R to A or B(3)
Conditions(1)
CL = 50 pF
RL = 500 Ohm
645T/2645T
Com.
Min.
Max.
645AT/2645AT 645CT/2645CT
Com.
Com.
Min.
Max.
Min.
Max.
645DT
Com.
Min.
Max. Unit
1.5
9.5
1.5
4.6
1.5
4.1
1.5
3.8
ns
1.5
11.0
1.5
6.2
1.5
5.8
1.5
5.0
ns
1.5
12.0
1.5
5.0
1.5
4.8
1.5
4.3
ns
1.5
11.0
1.5
6.2
1.5
5.8
1.5
5.0
ns
1.5
12.0
1.5
5.0
1.5
4.8
1.5
4.3
ns
Notes:
1. See test circuit and waveforms.
2. Minimum limits are guaranteed but not tested on Propagation Delays.
3. This parameter is guaranteed but not production tested.
Pericom Semiconductor Corporation
2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com
4
PS2012B
09/22/99