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Электронный компонент: PI74LPT16827C

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PI74LPT16827
3.3V 20-BIT BUFFERS
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PS2075A 01/16/97
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PI74LPT16827
Fast CMOS 3.3V 20-Bit Buffers
Logic Block Diagram
Product Features
Compatible with LCXTM and LVTTM families of products
Supports 5V Tolerant Mixed Signal Mode Operation
Input can be 3V or 5V
Output can be 3V or connected to 5V bus
Advanced Low Power CMOS Operation
Excellent output drive capability:
Balanced drives (24 mA sink and source)
Pin compatible with industry standard double-density
pinouts
Low ground bounce outputs
Hysteresis on all inputs
Industrial operating temperature range: 40C to +85C
Multiple center pins and distributed Vcc/GND pins
minimize switching noise
Packages available:
56-pin 240 mil wide plastic TSSOP (A)
56-pin 300 mil wide plastic SSOP (V)
Product Description
Pericom Semiconductor's PI74LPT series of logic circuits are
produced in the Company's advanced 0.6 micron CMOS technology,
achieving industry leading speed grades.
The PI74LPT16827 is a 20-bit wide bus driver designed to provide
buffering and high-performance bus interfacing for wide data/
address paths or busses with parity. Two pairs of nanded output
enable controls allow the device to be operated as two 10-bit buffers
or as one 20-bit buffer. Signal pins are arranged in a flow-through
organization for ease of layout and hysteresis is designed into all
inputs to improve noise margin.
The PI74LPT16827 can be driven from either 3.3V or 5.0V devices
allowing this device to be used as a translator in a mixed
3.3/5.0V system.
1
OE
1
1
OE
2
1
A
1
1
Y
1
To 9 other channels
2
OE
1
2
OE
2
2
A
1
2
Y
1
To 9 other channels
PI74LPT16827
3.3V 20-BIT BUFFERS
2
PS2075A 01/16/97
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Product Pin Configuration
Note:
1. This parameter is determined by device characterization but is not production tested.
Capacitance
(T
A
= 25C, f = 1 MHz)
Parameters
(1)
Description
Test Conditions
Typ
Max.
Units
C
IN
Input Capacitance
V
IN
= 0V
4.5
6
pF
C
OUT
Output Capacitance
V
OUT
= 0V
5.5
8
pF
Pin Name
Description
xOEx
Output Enable Inputs (Active LOW)
xAx
Data Inputs
xYx
3-State Outputs
Product Pin Description
Inputs
Outputs
xOE
1
xOE
2
xAx
xYx
L
L
L
L
L
L
H
H
H
X
X
Z
X
H
X
Z
Truth Table
(1)
1.
H = High Voltage Level
L = Low Voltage Level
X = Don't Care
Z = High Impedance
1
OE
1
1
1
Y
1
2
1
Y
2
3
GND
4
1
Y
3
5
1
Y
4
6
V
CC
7
1
Y
5
8
1
Y
6
9
1
Y
7
10
GND
11
1
Y
8
12
1
Y
9
13
1
Y
10
14
2
Y
1
15
2
Y
2
16
2
Y
3
17
GND
18
2
Y
4
19
2
Y
5
20
2
Y
6
21
V
CC
22
2
Y
7
23
2
Y
8
24
1
OE
2
56
1
A
1
55
1
A
2
54
GND
53
1
A
3
52
1
A
4
51
V
CC
50
1
A
5
49
1
A
6
48
1
A
7
47
GND
46
1
A
8
45
1
A
9
44
1
A
10
43
2
A
1
42
2
A
2
41
2
A
3
40
GND
39
2
A
4
38
2
A
5
37
2
A
6
36
V
CC
35
2
A
7
34
2
A
8
33
GND
25
2
Y
9
26
2
Y
10
27
2
OE
1
28
GND
32
2
A
9
31
2
A
10
30
2
OE
2
29
56-Pin
V-56
A56
PI74LPT16827
3.3V 20-BIT BUFFERS
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PS2075A 01/16/97
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DC Electrical Characteristics
(Over the Operating Range, T
A
= 40C to +85C, V
CC
= 2.7V to 3.6V)
Parameters
Description
Test Conditions
(1)
Min.
Typ
(2)
Max.
Units
V
IH
Input HIGH Voltage (Input pins)
Guaranteed Logic HIGH Level
2.2
--
5.5
V
Input HIGH Voltage (I/O pins)
2.0
--
5.5
V
V
IL
Input LOW Voltage
Guaranteed Logic LOW Level
0.5
--
0.8
V
(Input and I/O pins)
I
IH
Input HIGH Current (Input pins)
V
CC
= Max.
V
IN
= 5.5V
--
--
1
A
Input HIGH Current (I/O pins)
V
CC
= Max.
V
IN
= V
CC
--
--
1
A
I
IL
Input LOW Current (Input pins)
V
CC
= Max.
V
IN
= GND
--
--
1
A
Input LOW Current (I/O pins)
V
CC
= Max.
V
IN
= GND
--
--
1
A
I
OZH
High Impedance Output Current
V
CC
= Max.
V
OUT
= 5.5V
--
--
1
A
I
OZL
(3-State Output pins)
V
CC
= Max.
V
OUT
= GND
--
--
1
A
V
IK
Clamp Diode Voltage
V
CC
= Min., I
IN
= 18 mA
--
0.7
1.2
V
I
ODH
Output HIGH Current
V
CC
= 3.3V, V
IN
= V
IH
or V
IL
, V
O
= 1.5V
(3)
36
60
110
mA
I
ODL
Output LOW Current
V
CC
= 3.3V, V
IN
= V
IH
or V
IL
, V
O
= 1.5V
(3)
50
90
200
mA
V
OH
Output HIGH Voltage
V
CC
= Min.
I
OH
= 0.1 mA Vcc-0.2
--
--
V
V
IN
= V
IH
or V
IL
I
OH
= 3 mA
2.4
3.0
--
V
V
CC
= 3.0V,
I
OH
= 8 mA
2.4
(5)
3.0
--
V
V
IN
= V
IH
or V
IL
I
OH
= 24 mA
2.0
--
--
V
OL
Output LOW Voltage
V
CC
= Min.
I
OL
= 0.1 mA
--
--
0.2
V
V
IN
= V
IH
or V
IL
I
OL
= 16 mA
--
0.2
0.4
V
I
OL
= 24 mA
--
0.3
0.5
V
I
OS
Short Circuit Current
(4)
V
CC
= Max.
(3)
, V
OUT
= GND
60
85
240
mA
I
OFF
Power Down Disable
V
CC
= 0V, V
IN
or V
OUT


4.5V
--
--
100
A
V
H
Input Hysteresis
--
150
--
mV
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
Note:
Stresses greater than those listed under MAXIMUM
RATINGS may cause permanent damage to the de-
vice. This is a stress rating only and functional opera-
tion 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.
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 = 3.3V, +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.
4. This parameter is guaranteed but not tested.
5. V
OH
= V
CC
0.6V at rated current.
Storage Temperature ............................................................ 55C to +125C
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 ............................................................................ 120 mA
Power Dissipation ................................................................................... 1.0W
PI74LPT16827
3.3V 20-BIT BUFFERS
4
PS2075A 01/16/97
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Power Supply Characteristics
Parameters Description
Test Conditions
(1)
Min.
Typ
(2)
Max.
Units
I
CC
Quiescent Power Supply Current
V
CC
= Max.
V
IN
= GND or V
CC
0.1
10
A
I
CC
Quiescent Power Supply Current
V
CC
= Max.
V
IN
= V
CC
0.6V
(3)
2.0
30
A
TTL Inputs HIGH
I
CCD
Dynamic Power Supply
(4)
V
CC
= Max.,
V
IN
= V
CC
50
75
A/
Outputs Open
V
IN
= GND
MHz
X
OE = GND
One Bit Toggling
50% Duty Cycle
I
C
Total Power Supply
V
CC
= Max.,
V
IN
= V
CC
0.6V
0.6
2.3
mA
Current
(6)
Outputs Open
V
IN
= GND
f
I
= 10 MH
Z
50% Duty Cycle
X
OE = GND
One Bit Toggling
V
CC
= Max.,
V
IN
= V
CC
0.6V
2.1
4.7
(5)
Outputs Open
V
IN
= GND
f
I
= 2.5 MH
Z
50% Duty Cycle
X
OE = GND
16 Bits Toggling
Notes:
1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device.
2. Typical values are at Vcc = 3.3V, +25C ambient.
3. Per TTL driven input; 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
CCL
, I
CCH
and I
CCZ
)
I
CC
= Power Supply Current for a TTL High Input
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)
N
CP
= Number of Clock Inputs at f
CP
f
I
= Input Frequency
N
I
= Number of Inputs at f
I
All currents are in milliamps and all frequencies are in megahertz.
PI74LPT16827
3.3V 20-BIT BUFFERS
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PS2075A 01/16/97
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LPT16827A
LPT16827B
LPT16827C
Com.
Com.
Com.
Parameters
Description
Conditions
(2)
Min.
(3)
Max.
Min.
(3)
Max.
Min.
(3)
Max.
Units
t
PLH
Propagation Delay
C
L
= 50 pF
1.5
6.5
1.5
5.0
1.5
4.4
ns
t
PHL
D
N
to Y
N
R
L
= 500
C
L
= 300 pF
(4)
1.5
15.0
1.5
13.0
1.5
10.0
ns
R
L
= 500
t
PZH
Output Enable Time
C
L
= 50 pF
1.5
9.5
1.5
8.0
1.5
7.0
ns
t
PZL
OE
N
to Y
N
R
L
= 500
C
L
= 300 pF
(4)
1.5
23.0
1.5
15.0
1.5
14.0
ns
R
L
= 500
t
PHZ
Output Disable Time
(4)
C
L
= 50 pF
(4)
1.5
8.5
1.5
6.0
1.5
5.7
ns
t
PLZ
OE
N
to Y
N
R
L
= 500
C
L
= 50 pF
1.5
10.0
1.5
7.0
1.5
6.0
ns
R
L
= 500
t
SK
(o)
Output Skew
(5)
--
0.5
--
0.5
--
0.5
ns
Switching Characteristics over Operating Range
(1)
Notes:
1. Propagation Delays and Enable/Disable times are with Vcc = 3.3V 0.3V, normal range. For Vcc = 2.7V,
extended range, all Propagation Delays and Enable/Disable times should be degraded by 20%.
2. See test circuit and waveforms.
3. Minimum limits are guaranteed but not tested on Propagation Delays.
4. This parameter is guaranteed but not production tested.
5. Skew between any two outputs, of the same package, switching in the same direction. This parameter is
guaranteed by design.
Pericom Semiconductor Corporation
2380 Bering Drive San Jose, CA 95131 1-800-435-2336 Fax (408) 435-1100 http://www.pericom.com