PI74ALVCHR162245A [ETC]
Dual 8-bit Bus Transceiver ; 双8位总线收发器\n
| 型号： | PI74ALVCHR162245A |
| 厂家： | 
ETC |
| 描述： | Dual 8-bit Bus Transceiver
|
| 文件： | 总4页 (文件大小：274K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
PI74ALVCHR162245
3.3V 16-Bit Bidirectional Transceiver
with 3-State Output
Product Description
Product Features
Pericom Semiconductors PI74ALVCH series of logic circuits are
produced using the Companys advanced 0.5 micron CMOS
technology to achieve industry-leading speed grades.
PI74ALVCHR162245isdesignedforlowvoltageoperation
Vcc=2.3Vto3.6V
Hysteresis on all inputs
The PI74ALVCHR162245 is a 16-bit bidirectional transceiver
designed 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 this
device 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)
< 0.8V at V = 3.3V, TA = 25°C
CC
Typical VOHV (Output VOH Undershoot)
< 2.0V at V = 3.3V, TA = 25°C
CC
All output ports have equivilent 26Ω series resistors:
No external resistors are required
Bus Hold retains last active bus state during 3-state
eliminating the need for external pull-up resistors
To ensure the high-impedance state during power up or power
down, OE should be tied to Vcc through a pull-up resistor; the
minimum value of the resistor is determined by the current sinking
ability of the driver.
Industrial operation at -40°C to +85°C
Packages available:
48-pin240-milwideplasticTSSOP(A)
48-pin300-milwideplasticSSOP(V)
Active bus-hold circuitry is provided to hold unused or floating
data inputs at a valid logic level.
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
1
B
0
1
2
3
4
5
6
7
2B
2B
2B
2B
2B
2B
2B
2
B
0
1
2
3
4
5
6
7
1
1
1
1
1
1
1
2
2
2
2
2
2
2
PS8343
10/09/98
1
PI74ALVCHR162245
3.3V 16-Bit Bidirectional Transceiver
with 3-State Outputs
Truth Table(1)
Product Pin Description
Pin Name
xOE
Description
Inputs
Outputs
3-State Output Enable Inputs (Active LOW)
Direction Control Input
Side A Inputs or 3-State Inputs
Side B Outputs or 3-State Outputs
Ground
xOE
L
xDIR
xDIR
L
H
X
Bus B Data to Bus A
Bus A Data to Bus B
Z
XAX
L
XBX
H
GND
Note:
1. H = High Voltage Level, X = Don't Care,
L = Low Voltage Level, Z = High Impedance
VCC
Power
Product Pin Configuration
Maximum Ratings
(Above which the useful life may be impaired. For user guide-
lines, not tested.)
1
DIR
1
2
3
4
5
6
7
8
9
48
47
46
1
1
1
OE
Storage Temperature ............................................. 65°C to +150°C
Ambient Temperature with Power Applied ........... 40°C to +85°C
Input Voltage Range, VIN ........................................ 0.5V to +4.6V
Output Voltage Range, VOUT .......................... 0.5V to VCC +0.5V
DC Input Voltage .....................................................0.5V to +5.0V
DC Output Current................................................................. 50 mA
Power Dissipation .....................................................................1.0W
1
B
0
1
A
0
1
1B
A
GND
45 GND
1B2
44
43
42
41
40
1A
2
3
1B
3
1A
Note:
V
CC
V
CC
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
conditionsabovethoseindicatedintheoperational sectionsofthis
specification is not implied. Exposure to absolute maximum
rating conditions for extended periods may affect reliability.
1
B
B
4
5
1A
4
1
1A
5
GND 10
39 GND
48-PIN
V48
A48
1B
1B
2B
2B
6
7
0
1
11
12
13
14
38
37
36
35
1A
1A
2A
2A
6
7
0
1
GND 15
34 GND
2
B
B
2
3
16
17
18
19
20
33
32
31
30
29
2
A
2
3
2
2A
V
CC
V
CC
2
B
B
4
5
2A
4
2
2A
5
GND 21
28 GND
2
B
6
7
22
23
27
26
25
2
2
2
A
6
7
2B
A
2
DIR 24
OE
PS8343
10/09/98
2
PI74ALVCHR162245
3.3V 16-Bit Bidirectional Transceiver
with 3-State Outputs
DC Electrical Characteristics (Over the Operating Range, TA = 40°C to +85°C, VCC = 3.3V ± 10%)
Parameters
Description
Test Conditions(1)
Min.
2.3
Typ.(2)
Max.
Units
VCC
Supply Voltage
3.6
V
CC = 2.3V to 2.7V
CC = 2.7V to 3.6V
CC = 2.3V to 2.7V
CC = 2.7V to 3.6V
1.7
(3)
IH
V
Input HIGH Voltage
Input LOW Voltage
V
2.0
V
0.7
0.8
(3)
(3)
V
IL
V
VIN
Input Voltage
0
0
VCC
(3)
V
OUT
Output Voltage
VCC
IOH = -100 µA, 2.3V to 3.6V
Vcc -0.2
V
IH = 1.7V
IH = 2V
IH = 1.7V
IH = 2V
IH = 2V
IH = 2V
2.3V
2.7V
1.9
2.2
I
OH = -4mA
V
VOH
Output HIGH Voltage
V
2.3V
3V
1.7
2.4
2
V
IOH = -6mA
V
I
OH = -8mA
OH = -12mA
OL = 100µA, 2.3V to 3.6V
V
2.7V
3V
I
V
2
I
0.2
V
IL = 0.7V
IH = 2V
IL = 0.7V
IL = 0.8V
IL = 0.8V
IL = 0.8V
2.3V
2.7V
2.3V
3V
0.4
0.4
I
OL = 4mA
V
V
OL
Output LOW Voltage
Output HIGH Current
V
0.55
0.55
0.6
IOL = 6mA
V
I
OL = 8mA
OL = 12mA
CC = 2.3V
CC = 2.7V
CC = 3.0V
CC = 2.3V
CC = 2.7V
CC = 3.0V
IN = VCC or GND, VCC = 3.6V
V
2.7V
3V
I
V
0.8
V
-6
(3)
OH
I
V
-8
-12
6
V
mA
V
(3)
OL
I
Output LOW Current
Input Current
V
8
V
12
±5
IIN
V
V
IN = 0.7V, VCC = 2.3V
IN = 1.7V, VCC = 2.3V
IN = 0.8V, VCC = 3.0V
IN = 2.0V, VCC = 3.0V
IN = 0 to 3.6V, VCC = 3.6V
VOUT = VCC or GND,
45
V
-45
75
Input
Hold
IIN
(
HOLD
)
V
Current
V
-75
µA
V
±500
±10
Output Current
(3-State Outputs)
I
OZ
V
CC = 3.6V
CC = 3.6V, IOUT = 0µA,
IN = GND or VCC
CC = 3.0V to 3.6V
V
V
Icc
Supply Current
40
V
Supply Current per Input @
TTL HIGH
One Input at VCC - 0.6V
Other Inputs at VCC or GND
750
∆Icc
C
I
Control Inputs
A or B Ports
V
IN = VCC or GND, VCC = 3.3V
4
9
pF
C
IO
VO
= VCC or GND, VCC = 3.3V
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. Unused Control Inputs must be held HIGH or LOW to prevent them from floating.
PS8343
10/09/98
3
PI74ALVCHR162245
3.3V 16-Bit Bidirectional Transceiver
with 3-State Outputs
Switching Characteristics over Operating Range(1)
From
To
VCC = 2.5V ± 0.2V
VCC = 2.7V
VCC = 3.3V ± 0.3V Units
Parameters
(INPUT)
(OUTPUT)
Min.(2)
1.0
Max.
4.9
Min.(2) Max. Min.(2)
Max.
4.2
tPD
tEN
tDIS
A or B
OE
4.7
6.7
5.7
1.0
1.0
1.0
B or A
1.0
6.8
5.6
ns
OE
1.0
6.3
5.5
Description
Input Transition Rise or Fall
∆t/∆v(3)
0
10
0
10
0
10
ns/V
Notes:
1. See test circuit and waveforms.
2. Minimum limits are guaranteed but not tested on Propagation Delays.
3. Recommended operating condition.
Operating Characteristics, TA = 25°C
V
CC = 2.5V ± 0.2V
V
CC = 3.3V ± 0.3V
Test
Conditions
Parameters
Units
Typ.
24
Typ.
32
Outputs Enabled
Outputs Disabled
Cpd Power
Dissipation Capacitance
C
L
= 50pF,
f = 10 MHz
pF
4
5
Pericom Semiconductor Corporation
2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com
PS8343
10/09/98
4
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