PI74AVC164245
PI74AVC164245A
16-Bit 1.2-2.5V to 3.3V Level Shifting
Transceiver with 3-State Outputs
Features
Î
Î
Î
Description
Pericom Semiconductor’s PI74AVC164245, a 16-bit (dual-octal)
noninverting bus transceiver, contains two separate supply rails:
B port (V
CCB
), set at 3.3V, and A port (V
CCA
), set to operate
at 1.2-2.5V. This arrangement permits translation from a 1.2-2.5V
to 3.3V environment and vice versa.
The PI74AVC164245 is designed for asynchronous communication
between data buses.
To ensure the high impedance state during power up or power
down, the output-enable (OE) input should be tied to V
CC
through
a pullup resistor: the minimum value of the resistor is determined
by the current-sinking capability of the driver.
PI74AVC164245 is designed for low voltage operation:
1.2V - 2.5V to 3.3V
Industrial operation at –40°C to +85°C
•
Packaging (Pb-free & Green available):
– 48-pin plastic 300-mil SSOP (V)
– 48-pin plastic 240-mil TSSOP (A)
– 48-pin plastic 173-mil TVSOP (K)
Truth Table
(each 8-bit section)
Inputs
OE
L
L
H
DIR
L
H
X
B data to A bus
A data to B bus
Isolation
Operation
Block Diagram
1DIR
1
48
1A1
47
2
To Seven Other Channels
2DIR 24
25
2A1
36
13
To Seven Other Channels
2OE
1OE
Pin Configuration (28-Pin TQFN)
(3.3V LVTTL) 1DIR
1B1
1B2
GND
1B3
1B4
(3.3V) VCCB
1B5
1B6
GND
1B7
1B8
2B1
2B2
GND
2B3
2B4
(3.3V) VCCB
2B5
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
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
1OE (3.3V LVTTL)
1A1
1A2
GND
1A3
1A4
VCCA (1.8V-2.5V)
1A5
1A6
GND
1A7
1A8
2A1
2A2
GND
2A3
2A4
VCCA (1.8V-2.5V)
2A5
2A6
GND
2A7
2A8
2OE (3.3V LVTTL)
1B1
2B1
2B6
GND
2B7
2B8
(3.3V LVTTL) 2DIR
10-0148
1
www.pericom.com
P-0.1
04/16/10
16-Bit 1.2-2.5V to 3.3V Level Shifting Transceiver with 3-State Outputs
Maximum Ratings
Note:
PI74AVC164245
(Absolute maximum ratings over operating free-air temperature range from V
CCB
at 3.3V & V
CCA
at 1.5 - 2.5V, unless otherwise
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.
Supply Voltage Range
V
CCA
....................... –0.5V to 3.8V
V
CCB
....................... –0.5V to 4.6V
Continuous output current, I
O
........................................ ±50mA
Continuous current through each V
CC
or GND
........... ±100mA
Package thermal impedance, 0
JA(3)
: A package .............
89°C/W
K package ............................
58°C/W
V package ............................
94°C/W
Storage temperature range, T
STG
...................... –65°C to 150°C
Input Voltage Range, V
I
Except I/O ports
(1)
. –0.5V to 4.6V
I/O port A
(2)
.. –0.5V to V
CCA
+0.5V
I/O port B
(1)
.. –0.5V to V
CCB
+0.5V
Input Clamp Current I
IK
(V
1
<0)
................................ –50mA
Ouput Clamp Current I
OK
(V
O
<0)
............................. –50mA
Recommended Operating Conditions for V
CCB
at 3.3V
(4)
Min.
V
CCB
V
IH
V
IL
V
IB
V
OB
I
OH
I
OL
Dt/Dv
T
A
Supply voltage
High-level voltage
Low-level voltage
Input Voltage
Output Voltage
High-level output current
Low-level output current
Input transition rise or fall rate
Operating free-air temperature
–40
0
0
3.0
2
0.8
V
CCB
V
CCB
–12
12
10
85
mA
ns/V
°C
V
Max.
3.6
Units
10-0148
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www.pericom.com
P-0.1
04/16/10
16-Bit 1.2-2.5V to 3.3V Level Shifting Transceiver with 3-State Outputs
Recommended Operating Conditions for V
CCA
at 2.5V
(4)
Min.
V
CCA
V
IH
V
IL
V
IA
V
OA
I
OH
I
OL
Dt/Dv
T
A
Notes:
1.
This value is limited to 4.6V maximum.
2.
This value is limited to 3.8V maximum.
3.
The package thermal impedance is calculated in accordance with JESD 51.
4. To ensure proper device operation, all unused device inputs must be held at the associated V
CC
or GND.
PI74AVC164245
Max.
2.7
0.7
Units
Supply voltage
High-level voltage
Low-level voltage
Input Voltage
Output Voltage
High-level output current
Low-level output current
Input transition rise or fall rate
Operating free-air temperature
V
CCA
= 2.3V
V
CCA
= 2.7V
V
CCA
= 2.3V
V
CCA
= 2.7V
V
CCA
= 2.3V to 2.7V
V
CCA
= 2.3V to 2.7V
2.3
1.7
V
0
0
V
CCA
V
CCA
-8
–12
8
12
10
ns/V
°C
mA
–40
85
Recommended Operating Conditions for V
CCA
at 1.8V
(4)
Min.
V
CCA
V
IH
V
IL
V
IB
V
OA
I
OH
I
OL
Dt/Dv
T
A
Notes:
1. To ensure proper device operation, all unused device inputs must be held at the associated VCC or GND.
Max.
1.95
0.35 x V
CCA
Units
Supply voltage
High-level voltage
Low-level voltage
Input Voltage
Output Voltage
High-level output current
Low-level output current
Input transition rise or fall rate
Operating free-air temperature
V
CCA
= 1.65V
V
CCA
= 1.95V
V
CCA
= 1.65V
V
CCA
= 1.95V
V
CCA
= 1.65V to 1.95V
V
CCA
= 1.65V to 1.95V
1.65
0.65 x V
CCA
V
0
0
V
CCA
V
CCA
-4
–8
4
8
10
ns/V
°C
mA
–40
85
10-0148
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www.pericom.com
P-0.1
04/16/10
16-Bit 1.2-2.5V to 3.3V Level Shifting Transceiver with 3-State Outputs
Electrical Characteristics
(
V
CCB
)
(Over recommended operating free-air temperature range for V
CCB
= 3.3V)
Parameter
I
OH
=
–100mA
V
OH
(A to B)
I
OH
=
–12mA
I
OL
=
–100mA
V
OL
(A to B)
I
OL
=
–12mA
I
I
I
OZ‡
I
CC
DI
CC
*
C
I
C
IO
Notes:
†
Typical values are measured at V
CC
= 3.3V, T
A
= 25°C
‡
For I/O ports, the parameter I
OZ
includes the input leakage current.
* This is the increase in supply current for each input that is at one of the specified TTL voltage levels rather than at 0 or the associated V
CC
.
PI74AVC164245
Test Conditions
V
CCB
3.0V
3.6V
3.0V
3.6V
3.0V
3.6V
3.0V
3.6V
3.6V
3.6V
3.6V
3.0V to
3.6V
3.3V
3.3V
Min.
2.8
3.4
2.2
2.8
Typ.
Max.
Units
0.2
0.2
0.5
0.5
±5
±10
20
500
4.5
6.5
V
Control Inputs
A or B ports
V
I
= V
CCB
or GND
V
O
= V
CCB
or GND
V
I
= V
CCB
or GND, I
O
= 0
One input at V
CCB
–0.6V, Other inputs at
V
CCB
or GND
µA
Control Inputs V
I
= V
CCB
or GND
A or B ports
V
O
= V
CCB
or GND
pF
10-0148
4
www.pericom.com
P-0.1
04/16/10
16-Bit 1.2-2.5V to 3.3V Level Shifting Transceiver with 3-State Outputs
Electrical Characteristics
(
V
CCA
)
(Over recommended operating free-air temperature range for V
CCA
= 2.5V)
Parameter
Test Conditions
I
OH
=
–100mA
V
OH
(B to A)
I
OH
=
–8mA
I
OH
=
–12mA
I
OL
=
–100mA
V
OL
(B to A)
I
OL
=
–8mA
I
OL
=
–12mA
I
I
I
OZ‡
I
CC
DI
CC
*
C
I
C
IO
Notes:
†
Typical values are measured at V
CC
= 3.3V, T
A
= 25°C
‡
For I/O ports, the parameter I
OZ
includes the input leakage current.
* This is the increase in supply current for each input that is at one of the specified TTL voltage levels rather than at 0 or the associated V
CC
.
PI74AVC164245
V
CCA
2.3V
2.7V
2.7V
2.3V to 2.7V
2.3V
2.7V
2.7V
2.7V
2.7V
2.3V to 2.7V
2.5V
2.5V
Min.
1.7
2.0
1.8
Typ.
†
Max.
Units
2.3V to 2.7V V
CC
- 0.1
V
0.2
0.4
0.5
±5
±10
30
500
4.5
6.5
µA
Control Inputs
A or B ports
V
I
= V
CCA
or GND
V
O
= V
CCB
or GND
V
I
= V
CCA
or GND, I
O
= 0
One input at V
CCA
–0.6V,
Other inputs at V
CCA
or GND
Control Inputs V
I
= V
CCA
or GND
A or B ports
V
O
= V
CCA
or GND
pF
10-0148
5
www.pericom.com
P-0.1
04/16/10
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