RECOM PI74LPT16827

PI74LPT16827
3.3V
20-BIT
BUFFERS
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PI74LPT16827
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Fast CMOS 3.3V 20-Bit Buffers
1
2
Product Features
Product Description
• Compatible with LCX™ and LVT™ 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: –40°C to +85°C
• 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)
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.
3
4
5
6
7
8
Logic Block Diagram
1OE1
2OE1
1OE2
2OE2
10
2 Y1
2A1
1 Y1
1A1
9
11
To 9 other channels
To 9 other channels
12
13
14
15
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PS2075A 01/16/97
PI74LPT16827
3.3V
20-BIT
BUFFERS
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Product Pin Configuration
Product Pin Description
1OE1
1
56
1OE2
1Y1
55
54
1A1
1Y2
2
3
GND
1Y3
4
5
53
52
GND
1A3
1Y4
6
7
51
50
1A4
8
9
49
48
10
11
56-Pin
12 V-56
13 A56
14
15
16
17
18
19
20
47
46
45
44
43
42
41
40
39
38
37
21
22
23
24
25
26
27
28
36
35
34
33
32
VCC
1Y5
1Y6
1Y7
GND
1Y8
1Y9
1Y10
2Y1
2Y2
2Y3
GND
2Y4
2Y5
2Y6
VCC
2Y7
2Y8
GND
2Y9
2Y10
2OE1
31
30
29
Pin Name
xOEx
xAx
xYx
1A2
VCC
1A5
1A6
Description
Output Enable Inputs (Active LOW)
Data Inputs
3-State Outputs
Truth Table(1)
Inputs
1A7
GND
1A8
1A9
1A10
2A1
2A2
2A3
GND
2A4
2A5
1.
Outputs
xOE1
xOE2
xAx
xYx
L
L
H
X
L
L
X
H
L
H
X
X
L
H
Z
Z
H = High Voltage Level
L = Low Voltage Level
X = Don't Care
Z = High Impedance
2A6
VCC
2A7
2A8
GND
2A9
2A10
2OE2
Capacitance (TA = 25°C, f = 1 MHz)
Parameters(1)
CIN
COUT
Description
Test Conditions
Typ
Max.
Units
Input Capacitance
Output Capacitance
VIN = 0V
VOUT = 0V
4.5
5.5
6
8
pF
pF
Note:
1. This parameter is determined by device characterization but is not production tested.
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PS2075A 01/16/97
PI74LPT16827
3.3V
20-BIT
BUFFERS
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Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
Storage Temperature ............................................................ –55°C to +125°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 ............................................................................ 120 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 indicated in the operational sections of
this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may
affect reliability.
VIH
IOZH
IOZL
VIK
IODH
IODL
VOH
Input HIGH Voltage (Input pins)
Input HIGH Voltage (I/O pins)
Input LOW Voltage
(Input and I/O pins)
Input HIGH Current (Input pins)
Input HIGH Current (I/O pins)
Input LOW Current (Input pins)
Input LOW Current (I/O pins)
High Impedance Output Current
(3-State Output pins)
Clamp Diode Voltage
Output HIGH Current
Output LOW Current
Output HIGH Voltage
VOL
Output LOW Voltage
IOS
IOFF
VH
Short Circuit Current(4)
Power Down Disable
Input Hysteresis
VIL
IIH
IIL
Test Conditions(1)
Description
Guaranteed Logic HIGH Level
Guaranteed Logic LOW Level
Min.
Typ(2)
Max.
Units
2.2
2.0
–0.5
—
—
—
5.5
5.5
0.8
V
V
V
—
—
—
—
—
—
–0.7
–60
90
—
3.0
3.0
—
—
0.2
0.3
–85
—
150
±1
±1
±1
±1
±1
±1
–1.2
–110
200
—
—
—
—
0.2
0.4
0.5
–240
±100
—
µA
µA
µA
µA
µA
µA
V
mA
mA
V
V
V
VCC = Max.
VIN = 5.5V
—
VCC = Max.
VIN = VCC
—
VCC = Max.
VIN = GND
—
VCC = Max.
VIN = GND
—
VCC = Max.
VOUT = 5.5V
—
VCC = Max.
VOUT = GND
—
VCC = Min., IIN = –18 mA
—
VCC = 3.3V, VIN = VIH or VIL, VO = 1.5V(3)
–36
(3)
VCC = 3.3V, VIN = VIH or VIL, VO = 1.5V
50
VCC = Min.
IOH = –0.1 mA Vcc-0.2
VIN = VIH or VIL
IOH = –3 mA
2.4
VCC = 3.0V,
IOH = –8 mA
2.4(5)
VIN = VIH or VIL
IOH = –24 mA
2.0
VCC = Min.
IOL = 0.1 mA
—
VIN = VIH or VIL
IOL = 16 mA
—
IOL = 24 mA
—
VCC = Max.(3), VOUT = GND
–60
VCC = 0V, VIN or VOUT ≤ 4.5V
—
—
2
3
4
DC Electrical Characteristics (Over the Operating Range, TA = –40°C to +85°C, VCC = 2.7V to 3.6V)
Parameters
1
V
V
V
mA
µA
mV
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, +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 guaranteed but not tested.
5. VOH = VCC – 0.6V at rated current.
5
6
7
8
9
10
11
12
13
14
15
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PS2075A 01/16/97
PI74LPT16827
3.3V
20-BIT
BUFFERS
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Power Supply Characteristics
Parameters Description
Test Conditions(1)
Min.
Typ(2)
Max.
Units
ICC
Quiescent Power Supply Current
VCC = Max.
VIN = GND or VCC
0.1
10
µA
∆ICC
Quiescent Power Supply Current
TTL Inputs HIGH
VCC = Max.
VIN = VCC – 0.6V(3)
2.0
30
µA
ICCD
Dynamic Power Supply(4)
VCC = Max.,
Outputs Open
XOE = GND
One Bit Toggling
50% Duty Cycle
VIN = VCC
VIN = GND
50
75
µA/
MHz
IC
Total Power Supply
Current(6)
VCC = Max.,
Outputs Open
fI = 10 MHZ
50% Duty Cycle
XOE = GND
One Bit Toggling
VIN = VCC – 0.6V
VIN = GND
0.6
2.3
mA
VCC = Max.,
Outputs Open
fI = 2.5 MHZ
50% Duty Cycle
XOE = GND
16 Bits Toggling
VIN = VCC – 0.6V
VIN = GND
2.1
4.7(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 = 3.3V, +25°C 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. IC =IQUIESCENT + IINPUTS + IDYNAMIC
IC = ICC + ∆ICC DHNT + ICCD (fCP/2 + fINI)
ICC = Quiescent Current (ICCL, ICCH and ICCZ)
∆ICC = Power Supply Current for a TTL High Input
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)
NCP = Number of Clock Inputs at fCP
fI = Input Frequency
NI = Number of Inputs at fI
All currents are in milliamps and all frequencies are in megahertz.
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PS2075A 01/16/97
PI74LPT16827
3.3V
20-BIT
BUFFERS
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1
Switching Characteristics over Operating Range(1)
LPT16827A
Com.
Parameters
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
tSK(o)
LPT16827B
Com.
LPT16827C
Com.
Description
Conditions(2)
Min.(3)
Max.
Min.(3)
Max.
Min.(3)
Max.
Units
Propagation Delay
DN to YN
CL = 50 pF
RL = 500 Ω
CL = 300 pF(4)
RL = 500 Ω
CL = 50 pF
RL = 500 Ω
CL = 300 pF(4)
RL = 500 Ω
CL = 50 pF(4)
RL = 500 Ω
CL = 50 pF
RL = 500 Ω
1.5
6.5
1.5
5.0
1.5
4.4
ns
1.5
15.0
1.5
13.0
1.5
10.0
ns
1.5
9.5
1.5
8.0
1.5
7.0
ns
1.5
23.0
1.5
15.0
1.5
14.0
ns
1.5
8.5
1.5
6.0
1.5
5.7
ns
1.5
10.0
1.5
7.0
1.5
6.0
ns
—
0.5
—
0.5
—
0.5
ns
Output Enable Time
OEN to YN
Output Disable Time
OEN to YN
Output Skew(5)
(4)
2
3
4
5
6
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.
7
8
9
10
11
12
13
14
15
Pericom Semiconductor Corporation
2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com
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PS2075A 01/16/97