21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
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2109876543212109876543210987654321098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74FCT16260T
PI74FCT162260T
Fast CMOS 12-Bit Tri-Port
Bus Exchanger
Product Features
Common Features
PI74FCT16260 and PI74FCT162260 are high-speed,
low power devices with high current drive.
V
CC
= 5V ± 10%
Typical tsk (o) (Output Skew) < 250ps, clocked mode
Extended range of 40°C to +85°C
Hysteresis on all inputs
PI74FCT16260T Features
High output drive: I
OH
= 32mA; I
OL
= 64mA
Power off disable outputs permit live insertion
Typical V
OLP
(Output Ground Bounce)
< 1.0V at V
CC
= 5V, T
A
= 25°C
PI74FCT162260T Features
Balanced output drive: I
OL
/I
OH
= 24mA
Typical V
OLP
(Output Ground Bounce)
< 0.6V at V
CC
= 5V, T
A
= 25°C
Series current limiting resistors
Packages available:
56-pin 240 mil wide TSSOP (A56)
56-pin 300 mil wide SSOP (V56)
Product Description
Pericom Semiconductors PI74FCT series of logic circuits
are produced in the Companys advanced 0.6 micron
CMOS technology, achieving industry leading speed grades.
The FCT16260AT/CT and the FCT162260AT/CT Tri-
Port Bus Exchangers are high-speed 12-bit latched bus
multiplexers/ transceivers for use in high speed
microprocessor applications. These Bus Exchangers support
memory interleaving with latched outputs on the B-ports
and address multiplexing with latched inputs on the B-
ports.
The Tri-port Bus Exchanger has three 12-bit ports. Data
may be transferred between the A-port and either/both of
the B-ports.
The latch enable (LE1B, LE2B, LEA1B and LEA2B)
inputs control data storage. When a latch-enable input is
HIGH, the latch is transparent. When the latch enable input
is LOW, the data at the input is latched and remains latched
until the latch enable input is returned HIGH. Independent
output enables (OE1B and OE2B allow reading from one
port while writing to the other port.
The FCT16260AT/CT are ideally suited for driving high
capacitance loads and low impedance backplanes. The
output buffers are designed with power off disable capability
to allow live insertion of boards when used as backplane
drivers.
The FCT162260AT/CT have balanced output drive with
current limiting resistors. This offers low ground bounce,
minimal undershoot, and controlled output fall times
reducing the need for external series terminating resistors.
Logic Block Diagram
1
PS8307A
11/17/98
Product Pin Description
Pin Name
O E2B
O E1B
LE1B
LE2B
LEA1B
LEA2B
O EA
SEL
A1
1B1
2B1
GND
V
CC
D e s cription
2B O utput Enable (Active LO W)
1B O utput Enable (Active LO W)
Latch Enable, A- 1B
Latch Enable, A21B
Latch Enable Input for 1B- A Latch
Latch Enable Input for 2B- A Latch
O utput Enable for A (Active LO W)
1B or 2B Path Selection
A- to- B Data Inputs for B- to- A 3 State O utputs
Bidirectional Data Port 1B
Bidirectional Data Port 2B
Ground
Power
(1)
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74FCT16260T
PI74FCT162260T
Fast CMOS 12-Bit Tri-Port Bus Exchanger
Product Pin Configuration
OEA
LE1B
2B3
GND
2B2
2B1
VCC
A1
A2
A3
GND
A4
A5
A6
A7
A8
A9
GND
A10
A11
A12
VCC
1B1
1B2
1
2
3
4
5
6
7
8
9
10
56
55
54
53
52
51
50
49
48
OE2B
LEA2B
2B4
GND
2B5
2B6
VCC
2B7
2B8
2B9
GND
2B10
2B11
2B12
1B12
1B11
1B10
GND
1B9
1B8
1B7
VCC
1B6
1B5
GND
1B4
LEA1B
OE1B
56-PIN
47
11
A56
46
V56
45
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
Truth Table
A to B (OEA = H)
INPUTS
OUTPUTS
OE1B
L
L
L
L
L
L
L
H
L
H
L
OE2B
L
L
L
L
L
L
L
H
H
L
L
1B
H
L
H
L
1B0
(2)
A
H
L
H
L
H
L
X
X
X
X
X
LEA1B
H
H
H
H
L
L
L
X
X
X
X
LEA2B
H
H
L
L
H
H
L
X
X
X
X
2B
H
L
2B0
(2)
2B0
(2)
H
L
2B0
(2)
Z
Z
Active
Active
GND
1B3
LE2B
SEL
Truth Table
(1)
B to A (OEB = H)
Inputs
1B
H
L
X
X
X
X
X
2B
X
X
X
H
L
X
X
SEL
H
H
H
L
L
L
X
LE1B
H
H
L
X
X
X
X
LE2B
X
X
X
H
H
L
X
OEA
L
L
L
L
L
L
H
Output A
H
L
A
(2)
H
L
A
(2)
Z
1B0
(2)
1B0
(2)
Z
Active
Z
Active
Notes:
1. H = High Signal Level
L
=
Low Signal Level
X = Irrelevant
Z = High Impedance
2. Output level before the indicated steady-state
input conditions were established.
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PS8307A
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21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74FCT16260T
PI74FCT162260T
Maximum Ratings
Fast CMOS 12-Bit Tri-Port Bus Exchanger
(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
Input Voltage Range, V
IN
......................................... 0.5V to V
CC
+0.5V
Output Voltage Range, V
OUT
................................... 0.5V to V
CC
+0.5V
DC Input Voltage ............................................................... 0.5V to +5.0V
DC Output Current .......................................................................... 100 mA
Power Dissipation ............................................................................... 1.0W
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 indi-
cated 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 ± 10%)
Parame te rs
V
IH
V
IL
I
IH
I
IL
I
OZH
I
OZL
V
IK
I
OS
V
H
De s cription
Input High Voltage
Input LOW Voltage
Input HIGH
Current
Input LOW
Current
(Input pins)
(I/O pins)
(Input pins)
(I/O pins)
Te s t Conditions
(1)
Guaranteed Logic HIGH Level
Guaranteed Logic LOW Level
V
CC
= Max.
V
CC
= Max.
V
CC
= Max.
V
IN
= V
CC
V
IN
= Max.
V
OUT
= 2.7V
V
OUT
= 0.5V
- 0.7
- 80
- 140
100
M in.
2.0
0.8
-1
-1
-1
-1
-1
-1
- 1.2
- 250
V
mA
mV
mA
Typ.
(2)
M ax.
Units
V
High Impedeance
Output Current
Clamp Diode Voltage
V
CC
= Min., I
IN
= - 18mA
Short Circuit Current (I/O pins) V
CC
= Max.
(3)
, V
OUT
= GND
Input Hysteresis
PI74FCT16260T Output Drive Characteristics
(Over the Operating Range)
Parame te rs
I
O
V
OH
V
OL
I
OFF
De s cription
Output Drive Current (I/O pins)
Te s t Conditions
(1)
V
CC
= Max.
(3)
, VOUT = 2.5V
V
CC
= Min.,
V
IN
= V
IH
= V
IH
or V
IL
V
CC
= Min., V
IN
= V
IH
= V
IH
or V
IL
V
CC
C
= 0V, V
IN
or V
OUT
≤
4.5V
I
OH
= - 3.0mA
I
OH
= - 15.0mA
I
OH
= - 32.0mA
I
OL
= 64mA
M in.
- 50
2.5
2.4
2.0
3.5
3.5
3.0
0.2
0.55
±1
mA
V
Typ.
(2)
M ax.
- 180
Units
mA
Output High Voltage
Output LOW Voltage
Input /Output Power OFF Leakage
PI74FCT162260T Output Drive Characteristics
(Over the Operating Range)
Parame te rs
V
OH
V
OL
I
ODL
I
ODH
De s cription
Output High Voltage
Output LOW Voltage
Output LOW Current
Output HIGH Current
Te s t Conditions
(1)
V
CC
= Min., V
IN
= V
IH
or V
IL
V
CC
= Min., V
IN
= V
IH
or V
IL
I
OH
= - 24.0mA
I
OL
= 24.0mA
60
- 60
M in.
2.4
Typ.
(2)
3.3
0.3
115
- 115
0.55
200
- 200
M ax.
Units
V
V
CC
= 5V, V
IN
= V
IH
or V
IL
, V
OUT
= 1.5V
(3)
V
CC
= 5V, V
IN
= V
IH
or V
IL
, V
OUT
= 1.5V
(3)
mA
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, +25ºC 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.
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PS8307A
11/17/98
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74FCT16260T
PI74FCT162260T
Fast CMOS 12-Bit Tri-Port Bus Exchanger
Min.
Typ.
(2)
5
0.5
60
Max.
500
1.5
100
Units
µA
mA
µA/
MHz
Power Supply Characteristics
Parameters Description
I
CCL
, I
CCH
, Quiescent Power
I
CCZ
Supply Current
DI
CC
I
CCD
Supply Current per
Input @ TTL HIGH
Supply Current per
Input per MHz
(4)
Test Conditions
(1)
V
CC
= Max.
V
CC
= Max.
V
CC
= Max.
Outputs Open
One Output Port Enabled
LExx = V
CC
One Input Bit Toggling
One Output Bit Toggling
50% Duty Cycle
V
CC
= Max.,
Outputs Open
f
I
= 10MHz
50% Duty Cycle
One Output Port Enabled
LExx = V
CC
One Input Bit Toggling
One Output Bit Toggling
V
CC
= Max.,
Outputs Open
f
I
= 2.5MHz
50% Duty Cycle
One Output Port Enabled
LExx = V
CC
Twelve Input Bit Toggling
Twelve Output Bit Toggling
V
IN
= GND or V
CC
V
IN
= 3.4V
(3)
V
IN
= V
CC
V
IN
= GND
I
C
Total Power Supply
Current
(6)
V
IN
= V
CC
V
IN
= GND
V
IN
= 3.4V
V
IN
= GND
0.6
1.5
mA
0.9
2.3
V
IN
= V
CC
V
IN
= GND
V
IN
= 3.4V
V
IN
= GND
1.8
3.5
(5)
4.8
12.5
(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 +
FI
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.
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PS8307A
11/17/98
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74FCT16260T
PI74FCT162260T
Fast CMOS 12-Bit Tri-Port Bus Exchanger
Switching Characteristics over Operating Range
(Propogation Delays)
16260AT/162260AT
Parame te rs
De s cription
Conditions
(1)
Com.
M in.
(2)
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
t
S U
t
H
t
W
t
S K (0)
Propagation Delay
Ax to 1Bx or Ax to 2Bx
Propagation Delay
1Bx to Ax or 2Bx to Ax
Propagation Delay
LExB to Ax
Propagation Delay
LEA1B to Bx or LEA2B to
2Bx
Propagation Delay
SEL to Ax
Output Enable Time
OEA to Ax, OE1B to 1Bx,
or OE2B to 2Bx
Output Disable Time
OEA to Ax, OE1B to 1Bx,
or OE2B to 2Bx
Setup Time, HIGH or LOW
Data to Latch
Hold Time, Latch to Data
Pulse Width, Latch HIGH
(4)
Output Skew
(3)
1.5
1.5
1.5
1.5
1.5
C
L
= 50 pF
R
L
= 500
W
1.5
M ax.
(2)
5.2
5.6
5.2
4.7
5.2
5.7
16260CT/162260CT
Com.
M in.
(2)
1.5
1.5
1.5
1.5
1.5
1.5
M ax.
(2)
4.7
5.0
4.7
4.4
4.7
5.1
16260ET/162260ET
Com.
M in.
(2)
1.5
1.5
1.5
1.5
1.5
1.5
M ax.
(2)
3.6
3.6
4.0
4.0
4.0
ns
4.4
Units
1.5
1.5
1.0
3.0
4.4
1.5
1.0
1.0
3.0
4.0
1.5
1.0
1.0
3.0
4.0
0.5
0.5
0.5
Notes:
1. See test circuit and waveforms.
2. Minimum limits are guaranteed but not tested on Propagation Delays.
3. Skew between any two outputs of the same package switching in the same direction.
This parameter is guaranteed by design.
4. This parameter is guaranteed but not production tested.
Capacitance
(T
A
= 25ºC, f = MHz)
Parame te rs
C
IN
C
I/O
D e s cription
Input Capacitance
I/O Capacitanc
Te s t Conditions
V
IN
= 0V
V
OUT
= 0V
Typ.
3.5
3.5
M ax.
6.0
8.0
Units
pF
Note:
1. This parameter is determined by device characterization but is 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
5
PS8307A
11/17/98
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