21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74FCT827/828T
(25Ω Series) P174FCT2827/2828T
Ω
10-BIT BUFFERS
PI74FCT827T, PI74FCT828T
(25Ω Series) PI74FCT2827T
Ω
Ω
(25Ω Series) PI74FCT2828T
Fast CMOS
10-Bit Buffers
Product Features
PI74FCT827/828/2827/2828T are pin compatible with bipolar
FAST™ Series at a higher speed and lower power
consumption
25Ω 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:
– 24-pin 300-mil wide plastic DIP (P)
– 24-pin 150-mil wide plastic QSOP (Q)
– 24-pin 150-mil wide plastic TQSOP (R)
– 24-pin 300-mil wide plastic SOIC (S)
Product Description
Pericom Semiconductor’s PI74FCT series of logic circuits are
produced in the Company’s advanced 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 PI74FCT827/828T and the PI74FCT2827/2828T are 10-bit
wide bus drivers providing high-performance bus interface
buffering for wide address/data paths or buses carrying parity. The
10-bit buffers have NAND-ed output enables for maximum control
flexibility. They are designed for high-capacitance load drive
capability, while providing low-capacitance bus loading at both
inputs and outputs. The PI74FCT827/2827T is a non-inverting of
the PI74FCT828/2828T.
Device models available upon request.
Logic Block Diagram
Y
0
Y
1
Y
2
Y
3
Y
4
Y
5
Y
6
Y
7
Y
8
Y
9
D
0
D
1
D
2
D
3
D
4
D
5
D
6
D
7
D
8
D
9
NOTE: PI74FCT827 is shown.
OE
1
OE
2
1
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PI74FCT827/828T
(25Ω Series) P174FCT2827/2828T
Ω
10-BIT BUFFERS
Product Pin Configuration
OE
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
GND
1
2
3
4
5
6
7
8
9
10
11
12
24-PIN
P24
Q24
R24
S24
Product Pin Description
24
23
22
21
20
19
18
17
16
15
14
13
Vcc
Y0
Y1
Y2
Y3
Y4
Y5
Y6
Y7
Y8
Y9
OE2
Pin Name
OE
N
D0-D9
Y0-Y9
GND
V
CC
Description
Output Enable Input (Active LOW)
10-bit Data Inputs
10-bit Data Outputs
Ground
Power
PI74FCT827/2827T
Truth Table (Non-Inverting)
(1)
Function
Transparent
Three-State
Inputs
OE1
OE2
L
L
H
X
L
L
X
H
D
N
L
H
X
X
Outputs
Y
N
L
H
Z
Z
PI74FCT828/2828T
Truth Table (Inverting)
(1)
Inputs
Outputs
Function
Transparent
Three-State
OE
1
L
L
H
X
OE
2
L
L
X
H
D
N
L
H
X
X
Y
N
H
L
Z
Z
1.
H = High Voltage Level
L = Low Voltage Level
X = Don’t Care
Z = High Impedance
2
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PI74FCT827/828T
(25Ω Series) P174FCT2827/2828T
Ω
10-BIT BUFFERS
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, T
A
= –40°C to +85°C, V
CC
= 5.0V ± 5%)
Parameters Description
V
OH
V
OL
V
OL
V
IH
V
IL
I
IH
I
IL
I
OZH
I
OZL
V
IK
I
OFF
I
OS
V
H
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
V
CC
= Min., I
IN
= –18mA
V
CC
= GND, V
OUT
= 4.5V
V
CC
= Max.
(3)
, V
OUT
= GND
—
–60
Test Conditions
(1)
V
CC
= Min., V
IN
= V
IH
or V
IL
V
CC
= Min., V
IN
= V
IH
or V
IL
V
CC
= Min., V
IN
= V
IH
or V
IL
Guaranteed Logic HIGH Level
Guaranteed Logic LOW Level
V
CC
= Max.
V
CC
= Max.
V
CC
= M
AX
.
V
IN
= V
CC
V
IN
= GND
V
OUT
= 2.7V
V
OUT
= 0.5V
–0.7
—
–120
200
I
OH
= –15.0mA
I
OL
= 48mA
I
OL
= 12mA (25Ω Series)
2.0
0.8
1
–1
1
–1
–1.2
100
Min. Typ
(2)
Max. Units
2.4
3.0
0.3
0.3
0.50
0.50
V
V
V
V
V
µA
µA
µA
µA
V
µA
mA
mV
Capacitance
(T
A
= 25°C, f = 1 MHz)
Parameters
(4)
C
IN
C
OUT
Description
Input Capacitance
Output Capacitance
Test Conditions
V
IN
= 0V
V
OUT
= 0V
Typ
6
8
Max.
10
12
Units
pF
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.
3
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PI74FCT827/828T
(25Ω Series) P174FCT2827/2828T
Ω
10-BIT BUFFERS
Power Supply Characteristics
Parameters Description
I
CC
∆I
CC
I
CCD
Quiescent Power
Supply Current
Supply Current per
Input @ TTL HIGH
Supply Current per
Input per MHz
(4)
V
CC
= Max.
V
CC
= Max.
V
CC
= Max.,
Outputs Open
OE
1
= OE
2
= GND
One Input Toggling
50% Duty Cycle
V
CC
= Max.,
Outputs Open
f
CP
= 10 MH
Z
50% Duty Cycle
OE
1
= OE
2
= GND
f
I
= 5 MH
Z
One Bit Toggling
V
CC
= Max.,
Outputs Open
f
CP
= 10 MH
Z
50% Duty Cycle
OE
1
= OE
2
= GND
Eight Bits Toggling
f
I
= 2.5 MH
Z
50% Duty Cycle
Test Conditions
(1)
V
IN
= GND
or V
CC
V
IN
= 3.4V
(3)
V
IN
= V
CC
V
IN
= GND
Min.
Typ
(2)
0.1
0.5
0.15
Max.
500
2.0
0.25
Units
µA
mA
mA/
MHz
I
C
Total Power Supply
Current
(6)
V
IN
= V
CC
V
IN
= GND
V
IN
= 3.4V
V
IN
= GND
1.5
3.5
(5)
mA
1.8
4.5
(5)
V
IN
= V
CC
V
IN
= GND
V
IN
= 3.4V
V
IN
= GND
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, +25°C ambient.
3. Per TTL driven input (V
IN
= 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. I
C
=I
QUIESCENT
+ I
INPUTS
+ I
DYNAMIC
I
C
= I
CC
+
∆I
CC
D
H
N
T
+ I
CCD
(f
CP
/2 + f
I
N
I
)
I
CC
= Quiescent Current
∆I
CC
= Power Supply Current for a TTL High Input (V
IN
= 3.4V)
D
H
= Duty Cycle for TTL Inputs High
N
T
= Number of TTL Inputs at D
H
I
CCD
= 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 f
I
All currents are in milliamps and all frequencies are in megahertz.
4
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PI74FCT828/2828T (inverting) Switching Characteristics over Operating Range
828AT/2828AT
828BT/2828BT
828CT
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.
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74FCT827/828T
(25Ω Series) P174FCT2827/2828T
Ω
10-BIT BUFFERS
PI74FCT827/2827T (non-inverting) Switching Characteristics over Operating Range
827AT/2827AT 827BT/2827BT
827CT/2827CT
827DT
Com.
Parameters
t
PLH
t
PHL
Description
Propagation Delay
D
N
to Y
N
Conditions
(1)
C
L
= 50pF
R
L
= 500Ω
C
L
= 300pF
(3)
R
L
= 500Ω
C
L
= 50pF
R
L
= 500Ω
C
L
= 300pF
(3)
R
L
= 500Ω
C
L
= 5pF
(3)
R
L
= 500Ω
C
L
= 50pF
R
L
= 500Ω
Min.
1.5
1.5
1.5
1.5
1.5
1.5
Max.
6.5
15.0
9.5
23.0
8.5
10.0
Com.
Min.
1.5
1.5
1.5
1.5
1.5
1.5
Max.
5.0
13.0
8.0
15.0
6.0
7.0
Com.
Min.
1.5
1.5
1.5
1.5
1.5
1.5
Max.
4.4
10.0
7.0
14.0
5.7
6.0
Com.
Min. Max.
1.5
1.5
1.5
1.5
1.5
1.5
3.8
7.5
5.0
9.0
4.3
4.3
ns
Units
t
PZH
t
PZL
Output Enable Time
OE
N
to Y
N
t
PHZ
t
PLZ
Output Disable Time
(3)
OE
N
to Y
N
Com.
Parameters
t
PLH
t
PHL
Description
Propagation Delay
D
N
to Y
N
Conditions
(1)
C
L
= 50 pF
R
L
= 500Ω
C
L
= 300 pF
(3)
R
L
= 500Ω
C
L
= 50 pF
R
L
= 500Ω
C
L
= 300 pF
(3)
R
L
= 500Ω
C
L
= 5 pF
(3)
R
L
= 500Ω
C
L
= 50 pF
R
L
= 500Ω
Min.
1.5
1.5
1.5
1.5
1.5
1.5
Max.
6.5
15.0
9.5
23.0
8.5
10.0
Com.
Min.
1.5
1.5
1.5
1.5
1.5
1.5
Max.
5.5
13.0
8.0
15.0
6.0
7.0
Com.
Min.
1.5
1.5
1.5
1.5
1.5
1.5
Max.
4.4
10.0
7.0
14.0
5.7
6.0
Units
ns
ns
ns
ns
ns
ns
t
PZH
t
PZL
Output Enable Time
OE
N
to Y
N
t
PHZ
t
PLZ
Output Disable Time
(3)
OE
N
to Y
N
Pericom Semiconductor Corporation
2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com
5
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