PI74ALVTC16245
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16-Bit BiDirectional Transceiver
with 3-State Outputs
Features
Description
• PI74ALVTC family is designed for low voltage operation,
VDD = 1.8V to 3.6V
Pericom Semiconductor’s PI74ALVTC16245 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 Hi-Z condition.
• Supports Live Insertion
• 3.6V I/O Tolerant Inputs and Outputs
• Bus Hold
• High Drive, -32/64mA @ 3.3V
• Uses patented noise reduction circuitry
To ensure the high-impedance state during power up or power
down, OE should be tied to Vdd through a pullup resistor; the
minimum value of the resistor is determined by the current-sinking
capability of the driver.
• Power-off high impedance inputs and outputs
• Industrial operation at –40°C to +85°C
• Packaging (Pb-free & Green available):
The family offers both I/O Tolerant, which allows it to operate in
mixed 1.8/3.6V systems, and “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.
– 48-pin 240- mil wide plastic TSSOP (A)
– 48-pin 173-mil wide plastic TVSOP (K)
– 48-pin 300-mil wide plastic SSOP (V)
Block Diagram
1DIR
2DIR
1OE
2OE
1A0
2A0
1B0
2B0
1A1
2A1
1B1
2B1
1A2
2A3
1B2
2B2
1A3
2 A4
1B3
2B3
1A4
2A5
1B4
2B4
1A5
2A6
1B5
2B5
1A6
2A7
1B6
2B6
1A7
2A8
1B7
2B7
1
PS8354B
09/22/04
PI74ALVTC16245
16-Bit BiDirectional Transceiver
with 3-State Outputs
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Truth Table(1)
Product Pin Description
Pin Name
De s cription
Inputs (1)
xOE
3- State Output Enable Inputs (Active LOW)
xDIR
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 Inputs or 3- State Outputs
H
X
High Z State
GND
Ground
VCC
Power
Notes:
1. H = High Signal Level
L = Low Signal Level
X = Don’t Care or Irrelevant
Z = High Impedance
Product Pin Configuration
1DIR
1
48
1OE
1B0
2
47
1A0
1B1
3
46
1A1
GND
4
45
GND
1B2
5
44
1A2
1B3
6
43
1A3
VCC
7
42
VCC
1B4
8
41
1A4
1B5
9
40
1A5
39
GND
GND
10
1B6
11
38
1A6
1B7
12
37
1A7
2B0
13
36
2A0
2B1
14
35
2A1
GND
15
34
GND
2B2
16
33
2A2
2B3
17
32
2A3
VCC
18
31
VCC
2B4
19
30
2A4
48-Pin
A, K, V
Outputs (1)
2B5
20
29
2A5
GND
21
28
GND
2B6
22
27
2A6
2B7
23
26
2A7
2DIR
24
25
2OE
2
PS8354B
09/22/04
PI74ALVTC16245
16-Bit BiDirectional Transceiver
with 3-State Outputs
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Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
Supply Voltage Range, VDD .......................................... –0.5V to 4.6V
Input Voltage Range, VI ................................................. -0.5V to 4.6V
Output Voltage Range, VO (3-Stated) ............................ -0.5V to 4.6V
Output Voltage Range, VO(1) (Active) ................. –0.5V to VDD +0.5V
DC Input Diode Current (IIK) VI
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