ETC PI74ALVCHT16245A

PI74ALVCHT16245
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3.3V 16-Bit Bidirectional Transceiver
with 3-State Output
Product Description
Product Features
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Pericom Semiconductor’s PI74ALVCH series of logic circuits are
produced in the Company’s advanced 0.5 micron CMOS technology,
achieving industry leading speed grades.
The PI74ALVCHT16245 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.
PI74ALVCHT16245 is designed for low voltage operation
VCC = 2.3V to 3.6V
5V I/O Tolerant
Hysteresis on all inputs
Typical VOLP (Output Ground Bounce)
< 0.8V at VCC = 3.3V, TA = 25°C
Typical VOHV (Output VOH Undershoot)
< 2.0V at VCC = 3.3V, TA = 25°C
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)
The PI74ALVCHT16245 has “Bus Hold” which retains the data
input’s last state whenever the data input goes to high-impedance
preventing “floating” inputs and eliminating the need for pullup/
down resistors.
The PI74ALVCHT16245 can be driven from either 3.3V or 5.0Vdevices
allowing this device to be used as a translator in a mixed 3.3/5.0V
system.
Logic Block Diagram
1DIR
2DIR
1OE
2OE
1A0
2A0
1B0
2B0
1A1
2A1
1B1
2B1
1A2
2A2
1B2
2B2
1A3
2A3
1B3
2B3
1A4
2A4
1B4
2B4
1A5
2A5
1B5
2B5
1A6
2A6
1B6
2B6
1A7
2A7
1B7
2B7
1
PS8308
07/30/98
PI74ALVCHT16245
3.3V 16-Bit Bidirectional Transceiver
with 3-State Outputs
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Truth Table(1)
Product Pin Description
Pin Name
Inputs (1)
Description
Outputs (1)
xOE
xDIR
Direction Control Input
L
L
Bus B Data to Bus A
XAX
Side A Inputs or 3-State Inputs
L
H
Bus A Data to Bus B
XBX
Side B Outputs or 3-State Outputs
H
X
Z
xOE
3-State Output Enable Inputs (Active LOW)
xDIR
GND
Ground
VCC
Power
Note:
1. H = High Voltage Level, X = Don't Care,
L = Low Voltage Level, Z = High Impedance
Product Pin Configuration
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
1DIR
1
48
1OE
1B0
47
46
45
1A0
1B1
GND
2
3
4
1A1
GND
1B2
5
44
1A2
1B3
6
43
1A3
VCC
7
42
VCC
1B4
8
41
1A4
1B5
40
39
1A5
GND
9
10
GND
1B6
11
38
1A6
1B7
12
13
37
36
1A7
14
15
35
34
2A1
33
32
2A2
2B3
16
17
VCC
18
31
VCC
2B4
30
29
28
2A4
2B5
GND
19
20
21
2A5
GND
2B6
22
27
2A6
2B7
23
26
2A7
2DIR
24
25
2OE
2B0
2B1
GND
2B2
48-Pin
A, V
Storage Temperature .............................................. –65°C to +150°C
Ambient Temperature with Power Applied ........... –40°C to +85°C
Input Voltage Range, VIN ........................................... –0.5V to +6.0V
Output Voltage Range, VOUT .................................... –0.5V to +6.0V
DC Input Voltage ....................................................... –0.5V to +6.0V
DC Output Current ................................................................. 50 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.
2A0
GND
2A3
2
PS8308
07/30/98
PI74ALVCHT16245
3.3V 16-Bit Bidirectional Transceiver
with 3-State Outputs
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DC Electrical Characteristics (Over the Operating Range, TA = –40°C to +85°C, VCC = 3.3V ± 10%)
Parame te rs
VCC
Supply Voltage
VIH(3)
Input HIGH Voltage
VIL(3)
Input LOW Voltage
VIN
(3)
(3)
VOUT
Te s t Condition(1)
De s cription
M in.
VOL
(3)
IOH
IOL(3)
IIN
IIN (HOLD)
M ax.
2.3
3.6
VCC = 2.3V to 2.7V
1.7
5.5
VCC = 2.7V to 3.6V
2.0
5.5
VCC = 2.3V to 2.7V
0.7
VCC = 2.7V to 3.6V
0.8
Input Voltage
0
5.5
Output Voltage
0
5.5
IOH = - 100µA, VCC = Min. to Max.
VOH
Typ(2)
Output HIGH Voltage
VCC - 0.2
VIH = 1.7V, IOH = - 6mA, VCC = 2.3V
2.0
VIH = 1.7V, IOH = - 12mA, VCC = 2.3V
1.7
VIH = 2.0V, IOH = - 12mA, VCC = 2.7V
2.2
VIH = 2.0V, IOH = - 12mA, VCC = 3.0V
2.4
VIH = 2.0V, IOH = - 24mA, VCC = 3.0V
2.0
V
IOL = 100µA, VIL = Min. to Max.
0.2
VIL = 0.7V, IOL = 6mA, VCC = 2.3V
0.4
VIL = 0.7V, IOL = 12mA, VCC = 2.3V
0.7
VIL = 0.8V, IOL = 12mA, VCC = 2.7V
0.4
VIL = 0.8V, IOL = 24mA, VCC = 3.0V
0.55
VCC = 2.3V
- 12
Output HIGH Current VCC = 2.7V
- 12
VCC = 3.0V
- 24
VCC = 2.3V
12
VCC = 2.7V
12
VCC = 3.0V
24
VIN = VCC or GND, VCC = 3.6V
±5
Output LOW Voltage
Output LOW Current
Input Current
Input Hold Current
Units
VIN = 0.8V, VCC = 3.0V
75
VIN = 2.0V, VCC = 3.0V
- 75
VIN = 0 to 3.6V, VCC = 3.6V
±500
IOZ
Output Current
(3- State Outputs)
VOUT = 5.5V or GND, VCC = 3.6V
±10
Icc
Supply Current
VCC = 3.6V, IOUT = 0µA,
VIN = GND or VCC
40
∆Icc
Supply Current per
Input @ TTL HIGH
VCC = 3.0V to 3.6V
One Input at VCC - 0.6V
Other Inputs at VCC or GND
750
CI
Control Inputs
VIN = VCC or GND, VCC = 3.3V
4
CIO
A or B Ports
VO = VCC or GND, VCC = 3.3V
7
mA
µA
pF
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
PS8308
07/30/98
PI74ALVCHT16245
3.3V 16-Bit Bidirectional Transceiver
with 3-State Outputs
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Switching Characteristics over Operating Range(1)
From
(INPUT)
To
(OUTPUT)
tPD
A or B
tEN
tDIS
Parame te rs
VCC = 2.5V ± 0.2V
M in.(2)
M ax.
B or A
1.0
OE
B or A
OE
B or A
VCC = 2.7V
M in.(2)
VCC = 3.3V ± 0.3V
M ax.
M in.(2)
M ax.
5.0
4.0
1.0
3.6
1.0
6.8
6.0
1.0
5.0
1.0
6.0
5.2
1.0
5.0
0
10
10
0
10
Units
ns
Description
∆t/∆v(3)
Input Transition Rise or Fall
0
ns/V
Notes:
1. See test circuit and wave forms.
2. Minimum limits are guaranteed but not tested on Propagation Delays.
3. Recommended operating condition.
Operating Characteristics, TA = 25°C
Parame te rs
CPD Power Dissipation
Capacitance
Te s t Conditons
O utputs Enabled
O utputs Disabled
CL = 50pF,
f = 10 MHz
VCC = 2.5V ±0.2V
VCC = 3.3V ±0.3V
Typical
Typical
22
29
4
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
PS8308
07/30/98