PI74FCT162Q245DTBX [PERICOM]
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| 型号： | PI74FCT162Q245DTBX |
| 厂家： | 
PERICOM SEMICONDUCTOR CORPORATION |
| 描述： | 暂无描述 |
| 文件： | 总6页 (文件大小：65K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
PI74FCT162Q245T
Fast, Low Noise CMOS 16-Bit
Bidirectional Transceivers
Product Features:
• VCC = 5V ±10%
Product Description:
Pericom Semiconductor’s PI74FCT series of logic circuits are pro-
duced in the Company’s advanced 0.6 micron CMOS technology,
achieving industry leading speed grades.
• Balanced output drivers:
±12 mA
• Output impedance:
35Ω (typical)
ThePI74FCT162Q245Tisa16-bitbidirectionaltransceiverdesigned
for asynchronous two-way communication between data buses.
The direction control input pin (xDIR) determines the direction of
data flow through the bidirectional transceiver. The Direction and
Output Enable controls are designed to operate these devices as
either two independent 8-bit transceivers or one 16-bit transceiver.
The output enable (OE) input, when HIGH, disables both A and B
ports by placing them in HIGH Z condition.
• Typical VOLP (Output Ground Bounce) < 0.5V
at VCC = 5V, TA = 25°C
• Bus Hold retains last active bus state during tri-state
• Hysteresis on all inputs
• Packages available:
– 48-pin 240-mil wide plastic TSSOP (A48)
– 48-pin 300-mil wide plastic SSOP (V48)
– 48-pin 150-mil wide plastic BQSOP (B48)
ThePI74FCT162Q245T isdesignedwithcurrentlimitingresistors
at its outputs to control the output edge rate resulting in lower
ground bounce and undershoot. This device features a typical
output impedance of 35Ω, eliminating the need for external
terminatingresistorsformostbusinterfaceapplications. Thisnoise
suppression benefit is designated by the letter “Q” (for quiet) in the
part number.
• Device models available on request
The PI74FCT162Q245T also features “Bus Hold” which retains
the input’s last state whenever the input goes to high-impedance
preventing “floating” inputs and eliminating the need for pullup/
down resistors.
Logic Block Diagram
1DIR
2DIR
1OE
2OE
1
A
A
A
A
A
A
A
A
0
1
2
3
4
5
6
7
2
A
A
A
A
A
A
A
A
0
1
2
3
4
5
6
7
1B
1B
1B
1B
1B
1B
1B
1B
0
1
2
3
4
5
6
7
2B
2B
2B
2B
2B
2B
2B
2B
0
1
2
3
4
5
6
7
1
1
1
1
1
1
1
2
2
2
2
2
2
2
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PI74FCT162Q245T
LOW NOISE 16-BIT BIDIRECTIONAL TRANSCEIVERS
Product Pin Description
Truth Table
Inputs(1)
Pin Name
xOE
Description
XOE
L
xDIR
Outputs(1)
Output Enable Inputs (Active LOW)
Direction Control Input
Side A Inputs or 3-State Outputs(1)
Side B Inputs or 3-State Outputs(1)
Ground
L
H
X
Bus B Data to Bus A
Bus A Data to Bus B
High Z State
xDIR
xAx
L
H
xBx
GND
VCC
Note: 1. H = High Voltage Level
X = Don’t Care
Power
L = Low Voltage Level
Z = High Impedance
Note: 1. For the PI74FCT162Q245T, these pins have “Bus
Hold.” All other pins are standard, outputs, or I/Os.
Product Pin Configuration
1
DIR
1
1
1
OE
1
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
1
B
B
0
1
A
A
0
1
2
1
3
GND
GND
4
1
B
B
2
3
1
A
A
2
3
5
1
1
6
V
CC
V
1
CC
7
1
B
B
4
5
A
4
5
8
1
1A
9
GND
GND
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
48-PIN
A48
B48
1B
1B
2B
2B
6
7
0
1
1
1
2
2
D6
A
A
A
7
0
1
V48
GND
GND
2
B
B
2
3
2
A
A
2
3
2
2
V
CC
V
2
CC
2
B
B
5
5
A
4
5
2
2A
GND
GND
2
B
B
6
7
2
2
2
A
6
7
2
A
2DIR
OE
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LOW NOISE 16-BIT BIDIRECTIONAL TRANSCEIVERS
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 ................................................................................... 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.
DC Electrical Characteristics (Over the Operating Range, TA = –40°C to +85°C, VCC = 5.0V ± 10%)
Parameters Description
Test Conditions(1)
Min. Typ(2) Max. Units
VIH
VIL
IIH
Input HIGH Voltage
Guaranteed Logic HIGH Level
Guaranteed Logic LOW Level
Standard Input, VCC = Max.
Bus Hold Input(4), VCC = Max.
Standard Input, VCC = Min.
Bus Hold Input(4), VCC = Min.
Bus Hold Input(4), VCC = Min.
2.0
V
V
Input LOW Voltage
Input HIGH Current
Input HIGH Current
Input LOW Current
Input LOW Current
Bus Hold
Sustain Current
High Impedance
Output Current
0.8
1
±100
–1
VIN = VCC
VIN = VCC
µA
µA
µA
µA
µA
IIH
IIL
IIL
VIN = GND
VIN = GND
VIN = 2.0V
VIN = 0.8V
VOUT = VCC
VOUT = GND
±100
IBHH
IBHL
IOZH
IOZL
VIK
IO
–50
+50
VCC = Max.
VCC = Max.
VCC = Min., IIN = –18 mA
VCC = Max.(3), VOUT = 2.5V
1
–1
–1.2
–180
µA
µA
V
mA
mV
Clamp Diode Voltage
Output Drive Current
Input Hysteresis
–0.7
100
–50
VH
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. Pins with Bus Hold are identified in the pin description.
5. This specification does not apply to bi-directional functionalities with Bus Hold.
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LOW NOISE 16-BIT BIDIRECTIONAL TRANSCEIVERS
Output Drive Characteristics (Over the Operating Range)
Parameters Description
Test Conditions(1)
Min. Typ(2) Max. Units
IODL
IODH
Output LOW Current
VCC = 5V, VIN = VIH OR VIL, VOUT = 1.5V(3)
36
-100
—
-166
—
-200
mA
mA
Output HIGH Current VCC = 5V, VIN = VIH OR VIL, VOUT = 1.5V(3)
Output Drive Characteristics (Over the Operating Range)
Parameters Description
Test Conditions(1)
Min. Typ(2) Max. Units
VOH
VOL
Output HIGH Voltage VCC = Min., VIN = VIH or VIL IOH = –12.0 mA
2.4
—
3.3
—
V
V
Output LOW Voltage
VCC = Min., VIN = VIH or VIL
IOL = 12 mA
0.4 0.55
Capacitance (TA = 25°C, f = 1 MHz)
Parameters(4)
Description
Test Conditions
Typ
Max.
Units
CIN
Input Capacitance
Output Capacitance
VIN = 0V
4.5
5.5
6
8
pF
pF
COUT
VOUT = 0V
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 tested 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.
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LOW NOISE 16-BIT BIDIRECTIONAL TRANSCEIVERS
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
0.5
60
500
µA
∆ICC
ICCD
Supply Current per
Input @ TTL HIGH
VCC = Max.
VIN = 3.4V(3)
1.5
mA
Supply Current per
Input per MHz(4)
VCC = Max.,
Outputs Open
VIN = VCC
VIN = GND
100
µA/
MHz
XOE = xDIR = GND
One Bit Toggling
50% Duty Cycle
IC
Total Power Supply
Current(6)
VCC = Max.,
Outputs Open
fI = 10 MHZ
VIN = VCC
VIN = GND
0.6
1.5(5)
mA
50% Duty Cycle
XOE = xDIR = GND
One Bit Toggling
VIN = 3.4V
VIN = GND
0.9
2.4
2.3(5)
4.5(5)
VCC = Max.,
VIN = VCC
Outputs Open
VIN = GND
fI = 2.5 MHZ
50% Duty Cycle
XOE = xDIR = GND
16 Bits Toggling
VIN = 3.4V
VIN = GND
6.4
16.5(5)
Notes:
1. For conditions shown as Max. or Min., 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 + ∆ICC 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.
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LOW NOISE 16-BIT BIDIRECTIONAL TRANSCEIVERS
Switching Characteristics over Operating Range
162Q245T
Com.
162Q245AT
Com.
162Q245CT
Com.
162Q245DT
Com.
162Q245ET
Com
Parameters
Description
Conditions(1)
Min
Max
Min
Max
Min
Max
Min
Max
Min
Max
Unit
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
tPZH
tPZL
tPHZ
tPLZ
tSK(o)
PropagationDelay
A to B, B to A
C
R
L
L
= 50 pF
1.5
1.5
1.5
1.5
1.5
—
7.0
1.5
1.5
1.5
1.5
1.5
—
4.6
1.5
4.1
1.5
3.8
1.5
3.2
ns
= 500Ω
Output Enable Time
9.5
7.5
9.5
7.5
0.5
6.2
5.0
6.2
5.0
0.5
1.5
1.5
1.5
1.5
—
5.8
4.8
5.8
4.8
0.5
1.5
1.5
1.5
1.5
—
5.0
4.3
5.0
4.3
0.5
1.5
1.5
1.5
1.5
—
4.4
4.0
4.8
4.0
0.5
ns
ns
ns
ns
ns
X
OE to A or B
Output Disable Time(3)
xOE to A or B
Output Enable Time
X
DIR to A or B(3)
Output Disable Time
xDIR to A or B(3)
Output Skew(4)
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.
4. 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
PS2050A 04/12/96
295
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