PI74LVCC3245A
8-Bit Dual Supply Bus Transceiver with
Configurable Output Voltage and 3-State Outputs
Product Features
• 2.7V to 3.6V on A-port and 3V to 5.5V on B-port
• Latch-up performance exceeds 200mA Per JESD78
• ESD protection exceeds JESD22
2000V Human-Body Model (A114-B)
200V Machine Model (A115-A)
• Industrial Temperature: –40°C to +85°C
• Packages (Pb-free available):
- 24-pin 173-mil wide plastic TSSOP (L)
(Pb-free & Green available)
- 24-pin 150-mil wide plastic QSOP (Q)
- 24-pin 300-mil wide plastic SOIC (S)
Product Description
Pericom Semiconductor’s PI74LVC series of logic circuits are
produced using the Company’s advanced submicron CMOS tech-
nology, achieving industry leading speed.
The PI74LVCC3245A is a non-inverting 8-bit Bidirectional Trans-
ceiver that uses two seperate power supply rails. A-port (V
CCA
) is set
to operate at 3.3V and B-port (V
CCB
) is set to operate from 3.3V to
5V. This allows for translation from a 3.3V to a 5V environment and
vice-versa. This tranceiver is designed for asynchronous two-way
communication between data buses. The direction control input pin
(DIR) determines the dataflow from the A bus to the B bus or from
the B bus to the A bus. The output enable (OE) input, when HIGH,
disables both A and B ports by placing them in HIGH Z condi-
tion.
Logic Block Diagram
DIR
2
22
Product Pin Configuration
OE
(3.3V) V
CCA
DIR
A1
A2
A3
A4
A5
A6
18
17
16
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
VCCB (3.3V to 5V)
NC
OE
B1
B2
B3
B4
B5
B6
B7
B8
GND
A
1
3
A
2
4
A
3
5
A
4
6
A
5
7
A
6
8
A
7
9
A
8 10
21
B
1
20
B
2
19
B
3
B
4
B
5
B
6
A7
A8
GND
GND
15
B
7
14
B
8
Product Pin Description
Pin Name
Description
3-State Output Enable Inputs (Active LOW)
Direction Control Input
Side A Inputs or 3-State Outputs
Side B Inputs or 3-State Outputs
NO Internal Connect
Ground
Power
OE
Truth Table
(1)
Inputs
OE
L
L
H
DIR
L
H
X
Bus B Data to Bus A
Bus A Data to Bus B
Z (Isolation)
L = Low Signal Level
Z = High Impedance
Outputs
DIR
Ax
Bx
NC
GND
V
CCA
,V
CCB
Note:
1. H = High Signal Level
X = Don’t Care or Irrelevant
1
PS8702A
09/10/03
PI74LVCC3245A
8-Bit Dual Supply Bus Transceiver with
Configurable Output Voltage and 3-State Outputs
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
Supply voltage range, V
CCA
and V
CCB ............................
–0.5V to +7V
Input voltage range, V
I(2)
: I/O ports (A-port)
....
–0.5V to V
CCA
+0.5V
I/O ports (B-port)
...........
–0.5V to V
CCB
+0.5V
Control Pins
.................
–0.5V to V
CCA
+0.5V
Input clamp current, I
IK
(V
I
<0)................................................–50mA
Output clamp current, I
OK
(V
O
<0)...........................................–50mA
Continous Output Current I
O
..................................................±50mA
Continous Current through each V
CC
or GND pin .....................±100mA
Package thermal impedance, θ
JA(3)
: package L...................... 84°C/W
package Q...................... 98°C/W
package S ...................... 79°C/W
Storage Temperature range, T
stg
................................–65°C to 150°C
Notes:
Stresses greater than those listed under MAXIMUM RATINGS may cause
permanent damage to the device. This is a stress rating only and func-
tional 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.
2. This value is limited to 7V maximum.
3. The package thermal impedance is calculated in accordance with JESD
51.
2
PS8702A
09/10/03
PI74LVCC3245A
8-Bit Dual Supply Bus Transceiver with
Configurable Output Voltage and 3-State Outputs
Recommended Operating Conditions
(4)
Parameter
V
CCA
V
CCB
V
IHA
Description
Supply Voltage
Supply Voltage
High-Level Input Voltage
V
OB
≤ 0.1V
or V
OB
≥ V
CCB
–0.1V
V
OA
≤ 0.1V
or V
OA
≥ V
CCA
–0.1V
V
OB
≤ 0.1V
or V
OB
≥ V
CCB
–0.1V
V
OA
≤ 0.1V
or V
OA
≥ V
CCA
–0.1V
V
OA
≤ 0.1V
or V
OA
≥ V
CCA
–0.1V,
or V
OB
≤ 0.1V
or V
OB
≥ V
CCB
–0.1V
V
OA
≤ 0.1V
or V
OA
≥ V
CCA
–0.1V,
or V
OB
≤ 0.1V
or V
OB
≥ V
CCB
–0.1V
2.7V
3.0V
3.6V
2.7V
3.0V
3.6V
2.7V
3.0V
3.6V
2.7V
3.0V
3.6V
2.7V
3.0V
3.6V
2.7V
3.0V
3.6V
3V
3.6V
5.5V
3V
3.6V
5.5V
3V
3.6V
5.5V
3V
3.6V
5.5V
3V
3.6V
5.5V
3V
3.6V
5.5V
0
0
0
0
2.7V
3.3V
2.7V
3.3V
2.7V
3.3V
2.7V
3.3V
3V
3V
3.3V
3V
3V
3V
3.3V
3V
2
2
2
0.8
0.8
0.8
V
CCA
V
CCB
V
CCA
V
CCB
–12
–24
–12
–24
12
24
12
24
10
–40
85
ns/v
°C
mA
V
CCA
V
CCB
Min.
2.7
3
2
2
2
2
2
3.85
0.8
0.8
0.8
0.8
0.8
1.65
V
Nom.
3.3
5
Max.
3.6
5.5
Units
V
IHB
High-Level Input Voltage
V
ILA
Low-Level Input Voltage
V
ILB
Low-Level Input Voltage
V
IH
High-Level Input Voltage
(Control Pins)
V
IL
V
IA
V
IB
V
OA
V
OB
I
OHA
I
OHB
I
OLA
I
OLB
∆t/∆v
T
A
Low-Level Input Voltage
(Control Pins)
Input Voltage
Input Voltage
Output Voltage
Output Voltage
High-level output Current
High-level output Current
Low-level output Current
Low-level output Current
Input transition Rise or Fall
Rate
Operating Free-Air Tem-
perature
Note:
4. All unused inputs of the device must be held at the associated V
CC
or GND to ensure proper device operation.
3
PS8702A
09/10/03
PI74LVCC3245A
8-Bit Dual Supply Bus Transceiver with
Configurable Output Voltage and 3-State Outputs
DC Electrical Characteristics
(Over the Operating Range, T
A
= –40°C to +85°C)
Parameters Description
Test Conditions
I
OH
= –100µA
V
OHA
Minimum High Level
Output Voltage (Port A)
I
OH
= –12mA
I
OH
= –24mA
I
OH
= –100µA
V
OHB
Minimum High Level
Output Voltage (Port B)
I
OH
= –12mA
I
OH
= –24mA
I
OL
= 100µA
V
OLA
Maximum Low Level
Output Voltage (Port A)
I
OL
= 12mA
I
OL
= 24mA
I
OL
= 100µA
V
OLB
Maximum Low Level
Output Voltage (Port B)
Maximum Input Leakage
Current (Control Inputs)
(5)
V
CCA
3V
2.7V
3V
3V
2.7V
3V
2.7V
3V
2.7V
3V
2.7V
3V
2.7V
3V
2.7V
3V
3.6V
V
CCB
3V
3V
3V
3V
4.5V
3V
3V
3V
4.5V
3V
3V
3V
4.5V
3V
3V
3V
4.5V
3.6V
5.5V
Min. Typ.
2.9
2.2
2.4
2.2
2
2.9
2.4
2.2
3.2
3
2.5
2.8
2.6
2.4
3
2.8
2.6
4.2
Max. Units
V
0.1
0.5
0.5
0.5
0.1
0.5
0.5
0.5
±1
±1
±5
10
10
10
10
10
50
µA
0.1
0.2
0.2
0.1
0.2
0.2
I
OL =
12mA
I
OL
= 24mA
V
I
= V
CCA
or GND
V
I
= V
IL
or V
IH
,
OE = V
CCA
V
O
= V
CCA/B
or GND
A port = V
CCA
or GND,
I
O
= 0
B to A, B-Port = V
CCB
or GND, I
O
(A port) = 0
A to B, A port = V
CCA
or GND, I
O
(B port) = 0
One input V
I
= V
CCA
–0.6V, other
inputs = V
CCA
or GND, OE = GND
and DIR = V
CCA
V
I
= V
CCA
–0.6V,
other inputs =V
CCA
or GND, DIR = V
CCA
V
I
= V
CCA
–0.6V,
other inputs = V
CCA
or GND,
OE = GND
One Input V
I
= V
CCB
–2.1V,
other inputs = V
CCB
or GND,
OE = GND and DIR = GND
I
I
I
OZ
Maximum 3-State
Output Leakage Current
(A or B ports)
Quiescent V
CCA
Supply Current
Quiescent V
CCB
Supply Current
I
CC
per input (A port)
3.6V
3.6V
3.6V
3.6V
3.6V
Open
3.6V
5.5V
3.6V
5.5V
I
CCA
I
CCB
3.6V
3.6V
I
CC(6)
I
CC
per input (OE)
3.6V
3.6V
50
µA
I
CC
per input (DIR)
3.6V
3.6V
50
I
CC
per input (B Port)
3.6V
5.5V
0.7
1.5
mA
Notes:
5. For I/O ports, the parameter I
OZ
includes the input leakage current.
6. This is the increase in supply current for each input that is at one of the specified voltage levels, rather than 0V or the associated V
CC
.
4
PS8702A
09/10/03
PI74LVCC3245A
8-Bit Dual Supply Bus Transceiver with
Configurable Output Voltage and 3-State Outputs
Capacitance
(T
A
= 25°C)
Parameters
C
IN
C
I/O
C
PD
Description
Control Input Capacitance
Input/Output Capacitance
(A or B port)
Power Dissipation Capaci-
tance
(7)
Test Conditions
V
I
= V
CCA
or GND, V
CCA
= Open, V
CCB
=Open
V
I/O
= V
CCA/B
or GND, V
CCA
= 3.3V, V
CCB
= 5V
Outputs Enabled
Outputs Disabled
V
CCA
= 3.3V, V
CCB
= 5V
C
L
= 0pF, f = 10MHz
Typ.
2.6
9
22
2.4
pF
Units
Notes:
7. C
PD
is defined as the value of the internal equivalent capacitance which is derived from dynamic operating current consumption (I
CCD
) at no
output loading and operating at 50% duty cycle, C
PD
is related to I
CCD
dynamic operating current by the expression: I
CCD =
(C
PD
)(V
CC
)(f
IN
)
+(I
CC
static)
AC Electrical Characteristics
(Over Operating Range, T
A
= –40°C to +85°C)
Parameters
t
PHL
t
PLH
t
PHL
t
PLH
t
PZL
t
PZH
t
PZL
t
PZH
t
PLZ
t
PHZ
t
PLZ
t
PHZ
t
SK(O)
From
(Input)
To
(Output)
V
CCA
= 2.7V to 3.6V,
V
CCB
= 5V ±0.5V
C
L
= 50pF, R
L
= 500Ω
Min.
A
B
OE
OE
OE
OE
B
A
A
B
A
B
1
1
1
1
1
1
1
1
1
1
1
1
Max.
5.6
5.3
5.0
5.2
8.0
7.8
8.1
8.4
7.1
7.3
7
7
1.5
V
CCA
= 2.7V to 3.6V,
V
CCB
= 3.3V ±0.3V
C
L
= 50pF, R
L
= 500Ω
Min.
1
1
1
1
1
1
1
1
1
1
1
1
Max.
7.1
7.2
6.4
6.6
9.0
8.8
9.1
8.8
7.3
7.5
7.5
7.6
1.5
ns
Units
Output-to-Output
Skew
(8)
Note:
8. Skew between any two outputs of the same device, switching in the same direction. Parameter guaranteed by design.
5
PS8702A
09/10/03
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