PERICOM PI74LVC3245A

ADVANCE INFORMATION
PI74LVC3245A
8-Bit Dual Supply Bus Transceiver
with 3-State Outputs
Product Features
Product Description
Pericom Semiconductor’s PI74LVC series of logic circuits are
produced using the Company’s advanced submicron CMOS technology, achieving industry leading speed.
•
•
•
•
2.7V to 3.6V on A-port and 4.5V to 5.5V on B-port
TTL Compatible Inputs
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
• Available Packages:
24-pin 173-mil wide plastic TSSOP (L)
24-pin 150-mil wide plastic QSOP (Q)
24-pin 300-mil wide plastic SOIC (S)
The PI74LVC3245A is a non-inverting 8-bit Bidirectional Transceiver that uses two seperate power supply rails. A-port (VCCA)
is set to operate at 3.3V and B-port (VCCB) is set to operate at 5V.
This allows for translation from a 3.3V to a 5Venvironment 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 condition.
Product Pin Configuration
Logic Block Diagram
DIR 2
22
A1 3
OE
(3.3V) VCCA
1
24
VCCB (5V)
DIR
2
23
NC
A1
3
22
OE
A2
4
21
B1
A3
5
20
B2
A4
6
19
B3
7
18
B4
21 B1
A2 4
20 B2
A3 5
A4 6
A5 7
A6 8
19
B3
A5
A6
8
17
B5
18
B4
A7
9
16
B6
17
B5
A8
10
15
B7
GND
11
14
B8
GND
12
13
GND
16
A7 9
B6
15 B7
A8 10
14 B8
Product Pin Description
Truth Table(1)
Inputs
Outputs
Pin Name
Description
OE
3-State Output Enable Inputs (Active LOW)
DIR
Direction Control Input
Ax
Side A Inputs or 3-State Outputs
OE
DIR
L
L
Bus B Data to Bus A
Bx
Side B Inputs or 3-State Outputs
L
H
Bus A Data to Bus B
NC
NO Internal Connect
H
X
Z (Isolation)
GND
Ground
VCCA,VCCB
Power
Note:
1. H = High Signal Level
X = Don’t Care or Irrelevant
L = Low Signal Level
Z = High Impedance
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P-0.3
08/05/03
ADVANCE INFORMATION
PI74LVC3245A
8-Bit Dual Supply Bus Transceiver
with 3-State Outputs
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
Supply voltage range, VCCA and VCCB ............................ –0.5V to +7V
Input voltage range, VI(2) : I/O ports (A-port) .... –0.5V to VCCA +0.5V
I/O ports (B-port) ........... –0.5V to VCCB+0.5V
Control Pins ................. –0.5V to VCCA +0.5V
Input clamp current, IIK (VI <0)................................................–50mA
Output clamp current, IOK (VO <0)...........................................–50mA
Continous Output Current IO ..................................................±50mA
Continous Current through each VCC or GND pin .....................±100mA
Package thermal impedance, θJA(3): package L...................... 84°C/W
package Q...................... 98°C/W
package S ...................... 79°C/W
Storage Temperature range, Tstg ................................–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 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.
2. This value is limited to 7V maximum.
3. The package thermal impedance is calculated in accordance with JESD
51.
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P-0.3
08/05/03
ADVANCE INFORMATION
PI74LVC3245A
8-Bit Dual Supply Bus Transceiver
with 3-State Outputs
Recommended Operating Conditions(4)
Parameters
Description
VCCA
VCCB
Min.
Typ.
Max.
VCCA
Supply Voltage
2.7
3.3
3.6
VCCB
Supply Voltage
4.5
5
5.5
VIHA
High-Level Input Voltage
VOB ≤ 0.1v or
VOB ≥ VCCB -0.1V
2.7V
5.0V
2
3.6V
5.0V
2
VIHB
High-Level Input Voltage
VOA ≤ 0.1V or
VOA ≥ VCCA -0.1V
3.3V
4.5V
2
3.3V
5.5V
2
VILA
Low-Level Input Voltage
VOB ≤ 0.1V or
VOB ≥ VCCB -0.1V
2.7V
5.0V
0.8
3.6V
5.0V
0.8
VILB
Low-Level Input Voltage
VOA ≤ 0.1V or
VOA ≥ VCCA -0.1V
3.3V
4.5V
0.8
3.3V
5.5V
0.8
High-Level Input Voltage
(Control Pins)
2.7V
4.5V
2
VIH
VOA ≤ 0.1V or
VOA ≥ VCCA -0.1V,
VOB ≤ 0.1V or
VOB ≥ VCCB -0.1V
3.6V
5.5V
2
VOA ≤ 0.1V or
VOA ≥ VCCA -0.1V,
VOB ≤ 0.1V or
VOB ≥ VCCB -0.1V
2.7V
4.5V
0.8
VIL
Low-Level Input Voltage
(Control Pins)
3.6V
5.5V
0.8
VIA
Input Voltage
0
VCCA
VIB
Input Voltage
0
VCCB
VOA
Output Voltage
0
VCCA
VOB
Output Voltage
0
VCCB
IOHA
High-Level Output Current
IOHB
High-Level Output Current
IOLA
Low-Level Output Current
IOLB
Low-Level Output Current
∆t/∆v
Input transition Rise or Fall
Rate
TA
Operating Free-Air Temp.
2.7V
4.5V
-12
3V
4.5V
-24
3V
4.5V
-24
2.7V
4.5V
12
3V
4.5V
24
3V
4.5V
24
-40
Units
V
mA
10
ns/v
85
ºC
Note: 4. All unused inputs of the device must be held at the associated VCC or GND to ensure proper device operation.
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P-0.3
08/05/03
ADVANCE INFORMATION
PI74LVC3245A
8-Bit Dual Supply Bus Transceiver
with 3-State Outputs
DC Electrical Characteristics (Over the Operating Range, TA = –40°C +85°C)
Parameters
Test Conditions
VCCA
VCCB
Min.
Typ.
IOH = –100µA
3V
4.5V
2.9
3
2.7V
4.5V
2.2
2.55
3V
4.5V
2.4
2.8
2.7V
4.5V
2
2.4
3V
4.5V
2.25
2.7
IOH = –100µA
3V
4.5V
4.4
4.5
IOH = –24mA
3V
4.5V
3.76
4.21
IOL = 100µA
3V
4.5V
0.01
0.1
IOL = 12mA
2.7V
4.5V
0.09
0.44
2.7V
4.5V
0.18
0.5
3V
4.5V
0.18
0.44
IOL = 100µA
3V
4.5V
0.01
0.1
IOL = 24mA
3V
4.5V
0.18
0.44
VI = VCCA or GND
3.6V
5.5V
±1
Maximum 3-State Output
Leakage Current (A or B
ports)
VI = VIL or VIH, OE = VCCA
VO = VCCA/B or GND
3.6V
5.5V
±5
ICCA
Quiescent VCCA
Supply Current
B to A, B-Port = VCCB or
GND, IO (A port) = 0
3.6V
5.5V
10
ICCB
Quiescent VCCB
Supply Current
A to B, A port = VCCA or
GND, IO (B port) = 0
3.6V
5.5V
10
ICC per input (A port)
One input VI = VCCA –0.6V,
other inputs = VCCA or GND,
OE = GND and DIR = VCCA
3.6V
5.5V
50
ICC per input (OE)
One input VI = VCCA –0.6V,
other inputs = VCCA or GND,
DIR = VCCA
3.6V
5.5V
50
ICC per input (DIR)
VI = VCCA –0.6V, other
inputs = VCCA or GND, OE
= GND
3.6V
5.5V
50
ICC per input (B Port)
One Input VI = VCCB –2.1V,
other inputs = VCCB or
GND, OE = GND and DIR
= GND
3.6V
5.5V
VOHA
Description
Minimum High Level
Output Voltage (Port A)
IOH = –12mA
IOH = –24mA
VOHB
VOLA
Minimum High Level
Output Voltage (Port B)
Maximum Low Level
Output Voltage (Port A)
VOLB
Maximum Low Level
Output Voltage (Port B)
II
Maximum Input Leakage
Current (Control Inputs)
IOZ
(5)
∆ICC(6)
IOL = 24mA
Max. Units
V
µA
0.7
1.5
uA
mA
Notes:
5. For I/O ports, the parameter IOZ 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 VCC.
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P-0.3
08/05/03
ADVANCE INFORMATION
PI74LVC3245A
8-Bit Dual Supply Bus Transceiver
with 3-State Outputs
Capacitance (TA = 25°C)
Parameters
Description
Test Conditions
Typ.
CIN
Control Input Capacitance
VI = VCCA or GND, VCCA = Open, VCCB =Open
2.8
CI/O
Input/Output Capacitance
(A or B port)
VI/O = VCCA/B or GND, VCCA = 3.3V, VCCB = 5V
9
Outputs Enabled
22
CPD
Power Dissipation
Capacitance (7)
Outputs Disabled
VCCA = 3.3V, VCCB = 5V
CL = 0pF, f = 10MHz
Units
pF
2.2
Notes:
7. CPD is defined as the value of the internal equivalent capacitance which is derived from dynamic operating current consumption (ICCD) at no output loading and operating at 50% duty cycle, CPD is related to ICCD dynamic operating current
by the expression: ICCD = (CPD)(VCC)(fIN) +(ICC static)
AC Electrical Characteristics (Over Operating Range, TA = –40°C to +85°C)
VCCA = 2.7V to 3.6V, VCCB = 5V ±0.5V
Parameters
tPHL
tPLH
tPHL
tPLH
tPZL
tPZH
tPZL
tPZH
tPLZ
tPHZ
tPLZ
tPHZ
tSK(O)
From (Input)
To (Output)
A
B
B
A
OE
A
OE
B
OE
A
OE
B
Output-to-Output
CL = 50pF, RL = 500Ω
Skew(8)
Units
Min.
Max.
1.0
6.3
1.0
6.0
1.0
5.7
1.0
6.0
1.0
7.8
1.0
7.5
1.0
7.8
1.0
7.6
1.0
7.0
1.0
7.5
1.0
7.0
1.0
7.3
ns
1.5
Note:
8. Skew between any two outputs of the same device, switching in the same direction. Parameter guaranteed by design.
5
P-0.3
08/05/03
ADVANCE INFORMATION
PI74LVC3245A
8-Bit Dual Supply Bus Transceiver
with 3-State Outputs
Power- Up Considerations
To avoid excessive supply current, bus contention or oscillation during power-up, the following guidelines should be followed:
1. Connect ground first before any supply voltage is applied.
2. Power up VCCA, which is the control side of the device.
3. Ramp OE ahead of or with VCCA to help prevent bus contention
4. Ramp DIR with VCCA if DIR high is needed (A bus to B bus). Otherwise keep DIR Low.
PARAMETER MEASUREMENT INFORMATION FOR A TO B PORT
VCCA =2.7V TO 3.6V and VCCB = 5V ± 0.5V
500Ω
500Ω
From Output
Under Test
CL = 50
50pF
S1
2xVCCB
Open
GND
500Ω
500Ω
(See Note A)
Load Circuit
Input
1.5V
tPHL
50% VCCB
Open
tPLZ/tPZL
2 x VCCB
tPHZ/tPZH
GND
1.5V
VOH
50% VCCB
VOL
Output
Waveform 2
S1 at GND
(see Note B)
Voltage Waveforms
Propagation Delay Times
1.5V
0V
tPLZ
Output
Waveform 1
S1 at 2 x VCCB 50% VCCB
(see Note B) t
PZH
0V
B-Port
Output
tPLH/tPHL
tPZL
1.5V
tPLH
S1
2.7V
Output
Control
2.7V
Test
VCCB
VOL +0.3V
VOL
tPHZ
50% VCCB
VOH –0.3V
VOH
0V
Voltage Waveforms
Enable and Disable Times
Figure 1. Load Circuit and Voltage Waveforms
Notes:
A. CL includes probe and jig capacitance.
B. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control.
Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control.
C. All input impulses are supplied by generators having the following characteristics: PRR ≤ 10 MHz, ZO = 50Ω, tR ≤ 2.5ns, tF ≤ 2.5ns.
D. The outputs are measured one at a time with one transition per measurement.
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P-0.3
08/05/03
ADVANCE INFORMATION
PI74LVC3245A
8-Bit Dual Supply Bus Transceiver
with 3-State Outputs
PARAMETER MEASUREMENT INFORMATION FOR B TO A PORT
VCCA =2.7V TO 3.6V and VCCB = 5V ± 0.5V
6V
500Ω
500Ω
From Output
Under Test
CL = 50
50pF
S1
Open
GND
500Ω
500Ω
(See Note A)
Load Circuit
B Port
Input
1.5V
A-Port
Output
0V
tPHL
VOH
1.5V
tPLH/tPHL
Open
tPLZ/tPZL
6V
tPHZ/tPZH
GND
1.5V
1.5V
VOL
Voltage Waveforms
Propagation Delay Times
1.5V
0V
tPZL
1.5V
tPLH
S1
2.7V
Output
Control
3V
Test
tPLZ
Output
Waveform 1
S1 at 6V
(see Note B) t
PZH
1.5V
Output
Waveform 2
S1 at GND
(see Note B)
1.5V
3V
VOL +0.3V
VOL
tPHZ
VOH –0.3V
VOH
0V
Voltage Waveforms
Enable and Disable Times
Figure 2. Load Circuit and Voltage Waveforms
Notes:
A. CL includes probe and jig capacitance.
B. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control.
Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control.
C. All input impulses are supplied by generators having the following characteristics: PRR ≤ 10 MHz, ZO = 50Ω, tR ≤ 2.5ns, tF ≤ 2.5ns.
D. The outputs are measured one at a time with one transition per measurement.
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P-0.3
08/05/03
ADVANCE INFORMATION
PI74LVC3245A
8-Bit Dual Supply Bus Transceiver
with 3-State Outputs
Packaging Mechanical: 24-pin TSSOP (L)
24
.169
.177
4.3
4.5
.004
.008
1
.303
.311
7.7
7.9
0.45
0.75
.047
1.20
Max
.007
.012
0.19
0.30
.0256
BSC
0.65
.002
.006
0.09
0.20
.018
.030
.252
BSC
6.4
SEATING
PLANE
0.05
0.15
X.XX DENOTES CONTROLLING
X.XX DIMENSIONS IN MILLIMETERS
Packaging Mechanical: 24-pin QSOP (Q)
24
.008
0.20
MIN.
.150
.157
3.81
3.99
Guage Plane
.010
0.254
.016
.035
0.41
0.89
Detail A
1
.337
.344
.053
.069
.015 x 45˚
0.38
1.35
1.75
Detail A
SEATING
PLANE
.025
typical
0.635
0˚-6˚
.041
1.04
REF
8.56
8.74
.033
0.84
.008
.013
0.20
0.33
.008 0.203
.012 0.305
.004 0.101
.010 0.254
.007
.010
.016
.050
0.178
0.254
0.406
1.27
.228
.244
5.79
6.20
X.XX DENOTES DIMENSIONS
X.XX IN MILLIMETERS
8
P-0.3
08/05/03
ADVANCE INFORMATION
PI74LVC3245A
8-Bit Dual Supply Bus Transceiver
with 3-State Outputs
Packaging Mechanical: 24-pin SOIC (S)
24
.2914
.2992
7.40
7.60
0.254
x 45˚
0.737
.010
.029
1
.0091
.0125
0-8˚
.5985 15.20
.6141 15.60
0.23
0.32
0.41 .016
1.27 .050
.021 0.533
.031 0.787
.0926 2.35
.1043 2.65
SEATING
PLANE
.050
BSC
.013
.020
0.33
0.51
1.27
.0040
.0118
.394
.419
10.00
10.65
0.10
0.30
X.XX DENOTES DIMENSIONS
X.XX IN MILLIMETERS
Ordering Information
Ordering Code
Package Code
Package Type
PI74LVC3245AL
L
24-pin, 173-mil wide plastic TSSOP
PI74LVC3245AQ
Q
24-pin, 150-mil wide plastic QSOP
PI74LVC3245AS
S
24-pin, 300-mil wide plastic SOIC
Notes:
1. Thermal characteristics can be found on the company web site at http://www.pericom.com/packaging/mechanicals.php
Pericom Semiconductor Corporation
2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com
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