21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74ALVCHR162245
3.3V 16-Bit Bidirectional Transceiver
with 3-State Output
Product Features
PI74ALVCHR162245 is designed for low voltage operation
Vcc = 2.3V to 3.6V
Hysteresis on all inputs
Typical V
OLP
(Output Ground Bounce)
< 0.8V at V
CC
= 3.3V, T
A
= 25°C
Typical V
OHV
(Output V
OH
Undershoot)
< 2.0V at V
CC
= 3.3V, T
A
= 25°C
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
Industrial operation at -40°C to +85°C
Packages available:
48-pin 240-mil wide plastic TSSOP (A)
48-pin 300-mil wide plastic SSOP (V)
Product Description
Pericom Semiconductors PI74ALVCH series of logic circuits are
produced using the Companys advanced 0.5 micron CMOS
technology to achieve industry-leading speed grades.
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.
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.
Active bus-hold circuitry is provided to hold unused or floating
data inputs at a valid logic level.
Logic Block Diagram
1
DIR
2
DIR
1
OE
2
OE
1
A
0
1
B
0
1
A
1
1
B
1
1
A
2
1
B
2
1
A
3
1
B
3
1
A
4
1
B
4
1
A
5
1
B
5
1
A
6
1
B
6
1
A
7
1
B
7
2
A
0
2
B
0
2
A
1
2
B
1
2
A
2
2
B
2
2
A
3
2
B
3
2
A
4
2
B
4
2
A
5
2
B
5
2
A
6
2
B
6
2
A
7
2
B
7
1
PS8343
10/09/98
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74ALVCHR162245
3.3V 16-Bit Bidirectional Transceiver
with 3-State Outputs
Product Pin Description
Pin Name
xO E
xDIR
X
A
X
X
B
X
Truth Table
(1)
Inputs
xOE
L
L
H
xD IR
L
H
X
Outputs
Bus B Data to Bus A
Bus A Data to Bus B
Z
De s cription
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
Power
GND
V
CC
Note:
1. H = High Voltage Level, X = Don't Care,
L = Low Voltage Level, Z = High Impedance
Product Pin Configuration
1
DIR
1
B
0
1
B
1
Maximum Ratings
(Above which the useful life may be impaired. For user guide-
lines, not tested.)
48
47
46
45
44
43
42
41
40
39
1
OE
1
A
0
1
A
1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
48-PIN
V48
A48
GND
1
B
2
1
B
3
GND
1
A
2
1
A
3
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 +4.6V
Output Voltage Range, V
OUT
.......................... 0.5V to V
CC
+0.5V
DC Input Voltage ..................................................... 0.5V to +5.0V
DC Output Current ................................................................. 50 mA
Power Dissipation ..................................................................... 1.0W
V
CC
1
B
4
1
B
5
V
CC
1
A
4
1
A
5
GND
1
B
6
1
B
7
2
B
0
2
B
1
GND
1
A
6
1
A
7
2
A
0
2
A
1
38
37
36
35
34
33
32
31
30
29
28
27
26
25
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.
GND
2
B
2
2
B
3
GND
2
A
2
2
A
3
V
CC
2
B
4
2
B
5
V
CC
2
A
4
2
A
5
GND
2
B
6
2
B
7
2
DIR
GND
2
A
6
2
A
7
2
OE
2
PS8343
10/09/98
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74ALVCHR162245
3.3V 16-Bit Bidirectional Transceiver
with 3-State Outputs
M in.
2.3
1.7
2.0
0.7
0.8
0
0
V
CC
V
CC
Typ.
(2)
M ax.
3.6
Units
DC Electrical Characteristics
(Over the Operating Range, T
A
= 40°C to +85°C, V
CC
= 3.3V ± 10%)
Parame te rs
V
CC
V
IH(3)
V
IL(3)
V
IN(3)
V
OUT(3)
De s cription
Supply Voltage
Input HIGH Voltage
Input LOW Voltage
Input Voltage
Output Voltage
I
OH
= - 100
µ
A, 2.3V to 3.6V
I
OH
= - 4mA
V
OH
Output HIGH Voltage
I
OH
= - 6mA
I
OH
= - 8mA
I
OH
= - 12mA
I
OL
= 100
µ
A, 2.3V to 3.6V
I
OL
= 4mA
V
OL
Output LOW Voltage
I
OL
= 6mA
I
OL
= 8mA
I
OL
= 12mA
V
CC
= 2.3V
I
OH(3)
Output HIGH Current
V
CC
= 2.7V
V
CC
= 3.0V
V
CC
= 2.3V
I
OL(3)
I
IN
Output LOW Current
Input Current
V
CC
= 2.7V
V
CC
= 3.0V
V
IN
= V
CC
or GND, V
CC
= 3.6V
V
IN
= 0.7V, V
CC
= 2.3V
I
IN
(
HOLD
)
Input
Hold
Current
V
IN
= 1.7V, V
CC
= 2.3V
V
IN
= 0.8V, V
CC
= 3.0V
V
IN
= 2.0V, V
CC
= 3.0V
V
IN
= 0 to 3.6V, V
CC
= 3.6V
I
OZ
Icc
∆
Icc
C
I
C
IO
Output Current
(3- State Outputs)
Supply Current
Supply Current per Input @
TTL HIGH
Control Inputs
A or B Ports
V
OUT
= VCC or GND,
V
CC
= 3.6V
V
CC
= 3.6V, I
OUT
= 0
µ
A,
V
IN
= GND or V
CC
V
CC
= 3.0V to 3.6V
One Input at V
CC
- 0.6V
Other Inputs at V
CC
or GND
V
IN
= V
CC
or GND, V
CC
= 3.3V
V
O
= V
CC
or GND, V
CC
= 3.3V
4
9
45
- 45
75
- 75
±500
±10
40
750
pF
µA
V
IL
= 0.7V
V
IH
= 2V
V
IL
= 0.7V
V
IL
= 0.8V
V
IL
= 0.8V
V
IL
= 0.8V
2.3V
2.7V
2.3V
3V
2.7V
3V
V
IH
= 1.7V
V
IH
= 2V
V
IH
= 1.7V
V
IH
= 2V
V
IH
= 2V
V
IH
= 2V
2.3V
2.7V
2.3V
3V
2.7V
3V
V
CC
= 2.3V to 2.7V
V
CC
= 2.7V to 3.6V
V
CC
= 2.3V to 2.7V
V
CC
= 2.7V to 3.6V
Te s t Conditions
(1)
Vcc - 0.2
1.9
2.2
1.7
2.4
2
2
0.2
0.4
0.4
0.55
0.55
0.6
0.8
-6
-8
- 12
6
8
12
±5
mA
V
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.
3
PS8343
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Switching Characteristics over Operating Range
(1)
Parame te rs
t
PD
t
EN
t
DIS
∆
t/
∆v
(3)
From
(INPUT)
A or B
OE
OE
D e s cription
Input Transition Rise or Fall
0
10
0
10
0
10
ns/V
B or A
To
(OUTPUT)
V
CC
= 2.5V ± 0.2V
M in.
(2)
1.0
1.0
1.0
M ax.
4.9
6.8
6.3
V
CC
= 2.7V
M in.
(2)
M ax.
4.7
6.7
5.7
V
CC
= 3.3V ± 0.3V
M in.
(2)
1.0
1.0
1.0
M ax.
4.2
5.6
5.5
ns
Units
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74ALVCHR162245
3.3V 16-Bit Bidirectional Transceiver
with 3-State Outputs
Notes:
1. See test circuit and waveforms.
2. Minimum limits are guaranteed but not tested on Propagation Delays.
3. Recommended operating condition.
Operating Characteristics, T
A
= 25°C
Parame te rs
Cpd Power
Dissipation Capacitance
O utputs Enabled
O utputs Disabled
Te s t
Conditions
C
L
= 50pF,
f = 10 MHz
V
CC
= 2.5V ± 0.2V
Typ.
24
4
V
CC
= 3.3V ± 0.3V
Typ.
32
5
Units
pF
Pericom Semiconductor Corporation
2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com
4
PS8343
10/09/98
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