IDT74AUC32245
1.8V CMOS 32-BIT BUS TRANSCEIVER WITH 3-STATE OUTPUTS
INDUSTRIAL TEMPERATURE RANGE
1.8V CMOS 32-BIT BUS
TRANSCEIVER WITH
3-STATE OUTPUTS
FEATURES:
DESCRIPTION:
IDT74AUC32245
• ESD > 2000V per MIL-STD-883, Method 3015; > 200V using
machine model (C = 200pF, R = 0)
• 1.8V Optimized
• 0.8V to 2.7V Operating Range
• Inputs/outputs tolerant up to 3.6V
• Output drivers: ±8mA @ V
DD
= 1.8V
• Supports hot insertion
• Available in 96-ball LFBGA package
APPLICATIONS:
• High performance, low voltage communications systems
• High performance, low voltage computing systems
This 32-bit bus transceiver is built using advanced CMOS technology. The
AUC32245 is designed specifically for asynchronous communications between
data buses. The control function implementation minimizes external timing
requirements.
This device can be used as one 32-bit transceiver, two 16-bit transceivers,
or four 8-bit transceivers. It allows data transmission from A bus to B bus or from
B bus to A bus, depending on the logic level at the direction-control (DIR) input.
The output-enable (OE) input can be used to disable the device so that the buses
are effectively isolated.
This device is fully specified for partial power-down applications using I
OFF
.
The I
OFF
circuitry disables the outputs, preventing damaging current backflow
through the device when it is powered down.
The AUC32245 is designed with a ±9mA output driver. This driver is capable
of driving a moderate load while maintaining speed performance.
To ensure the high-impedance state during power up or power down,
OE
should be tied to V
DD
through a pull-up resistor; the minimum value of the resistor
is determined by the current-sinking capability of the driver.
FUNCTIONAL BLOCK DIAGRAM
1
DIR
A3
A4
3
DIR
1
OE
J3
J4
3
OE
1
A
1
A5
A2
3
A
1
1
B
1
J5
J2
3
B
1
TO SEVEN OTHER CHANNELS
TO SEVEN OTHER CHANNELS
2
DIR
H3
H4
4
DIR
2
OE
T3
T4
4
OE
4
A
1
N5
N2
2
A
1
E5
E2
2
B
1
4
B
1
TO SEVEN OTHER CHANNELS
TO SEVEN OTHER CHANNELS
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
1
© 2003 Integrated Device Technology, Inc.
MARCH 2003
DSC-6374/1
IDT74AUC32245
1.8V CMOS 32-BIT BUS TRANSCEIVER WITH 3-STATE OUTPUTS
INDUSTRIAL TEMPERATURE RANGE
PINOUT CONFIGURATION
6
1
A
2
1
A
4
1
A
6
1
A
8
2
A
2
2
A
4
2
A
6
2
A
7
3
A
2
3
A
4
3
A
6
3
A
8
4
A
2
4
A
4
4
A
6
4
A
7
5
1
A
1
1
A
3
1
A
5
1
A
7
2
A
1
2
A
3
2
A
5
2
A
8
3
A
1
3
A
3
3
A
5
3
A
7
4
A
1
4
A
3
4
A
5
4
A
8
4 1
OE
GND
GND
1
B
3
V
CC
V
CC
GND
GND
V
CC
V
CC
GND
GND
2
OE
3
OE
GND
GND
3
B
3
V
CC
V
CC
3
B
5
GND
GND
3
B
7
GND
GND
4
B
1
V
CC
V
CC
4
B
3
GND
GND
4
B
5
4
OE
3 1
DIR
GND
1
B
7
GND
2
B
1
2
DIR
3
DIR
4
DIR
2
1
B
1
1
B
5
2
B
3
2
B
5
2
B
8
3
B
1
4
B
8
1
1
B
2
A
1
B
4
B
1
B
6
C
1
B
8
D
2
B
2
E
2
B
4
F
2
B
6
G
2
B
7
H
3
B
2
J
3
B
4
K
3
B
6
L
3
B
8
M
4
B
2
N
4
B
4
P
4
B
6
R
4
B
7
T
LFBGA
TOP VIEW
96 BALL LFBGA PACKAGE ATTRIBUTES
1.5mm Max.
1.4mm Nom.
1.3mm Min.
0.8mm
6
5
4
3
2
1
A
B
C
D
E
F
G
H
J
K
L
M
N
P
R
T
TOP VIEW
A
1
2
3
B
C
D
E
F
G
H
J
K
L
M
N
P
R
T
5.5mm
4
5
6
13.5mm
2
IDT74AUC32245
1.8V CMOS 32-BIT BUS TRANSCEIVER WITH 3-STATE OUTPUTS
INDUSTRIAL TEMPERATURE RANGE
ABSOLUTE MAXIMUM RATINGS
(1)
Symbol
V
TERM
V
TERM
Description
Terminal Voltage with Respect to GND
(all input and V
DD
terminals)
Terminal Voltage with Respect to GND
(any I/O or Output terminals in high-
impedance or power-off state)
V
TERM
Terminal Voltage with Respect to GND
(any I/O or Output terminals in high or
low state)
T
STG
I
OUT
I
IK
I
OK
I
DD
I
SS
Storage Temperature
Continuous DC Output Current
Continuous Clamp Current
V
I
> V
DD
V
I
< 0
Continuous Clamp Current, V
O
< 0
Continuous Current through
each V
DD
or GND
–65 to +150
±20
+50
–50
–50
±100
mA
mA
°C
mA
mA
–0.5 to +3.6
V
–0.5 to +3.6
V
Max
–0.5 to +3.6
Unit
V
CAPACITANCE
(T
A
= +25°C, f = 1.0MHz, V
DD
= 2.5V)
Symbol
C
IN
C
I/O
Parameter
Input Capacitance
(1)
Conditions
V
IN
= V
DD
or GND
Typ.
3
7
Max. Unit
pF
pF
I/O Port Capacitance
(2)
V
I/O
= V
DD
or GND
NOTES:
1. Applies to the Control Inputs.
2. Applies to ports A and B.
PIN DESCRIPTION
Pin Names
xOE
xDIR
xAx
xBx
Description
3-State Output Enable Inputs (Active Low)
Direction Control Inputs
A Side Inputs or 3-State Outputs
B Side Inputs or 3-State Outputs
FUNCTION TABLE
(EACH 8-BIT SECTION)
(1)
Inputs
xOE
L
L
H
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don't Care
Z = High-Impedance
NOTE:
1. Stresses greater than those listed under ABSOLUTE 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.
xDIR
L
H
X
Outputs
Bus B Data to Bus A
Bus A Data to Bus B
Z
3
IDT74AUC32245
1.8V CMOS 32-BIT BUS TRANSCEIVER WITH 3-STATE OUTPUTS
INDUSTRIAL TEMPERATURE RANGE
RECOMMENDED OPERATING CHARACTERISTICS
(1)
Symbol
V
DD
Parameter
Supply Voltage
V
DD
= 0.8V
V
DD
= 1.1V to 1.3V
V
IH
Input HIGH Voltage Level
V
DD
= 1.4V to 1.6V
V
DD
= 1.65V to 1.95V
V
DD
= 2.3V to 2.7V
V
DD
= 0.8V
V
DD
= 1.1V to 1.3V
V
IL
Input LOW Voltage Level
V
DD
= 1.4V to 1.6V
V
DD
= 1.65V to 1.95V
V
DD
= 2.3V to 2.7V
V
I
V
O
Input Voltage
Output Voltage
Active State
3-State
V
DD
= 0.8V
V
DD
= 1.1V
I
OH
HIGH Level Output Current
V
DD
= 1.4V
V
DD
= 1.65V
V
DD
= 2.3V
V
DD
= 0.8V
V
DD
= 1.1V
I
OL
LOW Level Output Current
V
DD
= 1.4V
V
DD
= 1.65V
V
DD
= 2.3V
∆t/∆v
T
A
Input Transition Rise or Fall Time
Operating Free-Air Temperature
Test Conditions
Min.
0.8
V
DD
0.65 x V
DD
0.65 x V
DD
0.65 x V
DD
1.7
—
—
—
—
—
0
0
0
—
—
—
—
—
—
—
—
—
—
—
–40
Max.
2.7
—
—
—
—
—
0
0.35 x V
DD
0.35 x V
DD
0.35 x V
DD
0.7
2.7
V
DD
2.7
–0.7
–3
–5
–8
–9
0.7
3
5
8
9
5
+85
ns/V
°C
mA
mA
V
V
V
V
Unit
V
NOTE:
1. All unused inputs of the device must be held at V
DD
or GND to ensure proper operation.
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
(1)
Following Conditions Apply Unless Otherwise Specified:
Operating Conditions: T
A
= –40°C to +85°C
Symbol
I
IH
I
IL
I
OFF
I
OZH
(2)
I
OZL
(2)
I
DDL
I
DDH
I
DDZ
NOTES:
1. All unused inputs of the device must be held at V
DD
or GND to ensure proper operation.
2. For the I/O ports, the parameters I
OZH
and I
OZL
include the input leakage current.
Parameter
Input HIGH or LOW Current Data Inputs
Control Inputs
Input/Output Power Off Leakage
High Impedance Output Current
(3-State Output Pins)
Quiescent Power Supply Current
Test Conditions
V
DD
= 2.7V, V
I
= V
DD
or GND
V
DD =
0V, V
IN or
V
O
≤
2.7V
V
DD
= 2.7V
V
DD
= 0.8V to 2.7V
V
IN
= GND or V
DD
V
O
= V
DD
V
O
= GND
Min.
—
—
—
—
—
—
Typ.
—
—
—
—
—
—
Max.
±10
±5
±10
±10
±10
40
Unit
µA
µA
µA
µA
4
IDT74AUC32245
1.8V CMOS 32-BIT BUS TRANSCEIVER WITH 3-STATE OUTPUTS
INDUSTRIAL TEMPERATURE RANGE
OUTPUT DRIVE CHARACTERISTICS
Symbol
Parameter
Test Conditions
(1)
I
OH
= –100µA
V
DD
= 0.8V - 2.7V
V
DD
= 0.8V
I
OH
= –0.7mA
V
DD
= 1.1V
(2)
I
OH
= –3mA
(3)
I
OH
= –5mA
V
DD
= 1.4V
V
DD
= 1.65V
(4)
I
OH
= –8mA
(5)
V
DD
= 2.3V
I
OH
= –9mA
I
OH
= 100µA
V
DD
= 0.8V - 2.7V
V
DD
= 0.8V
I
OL
= 0.7mA
(2)
V
DD
= 1.1V
I
OL
= 3mA
I
OL
= 5mA
V
DD
= 1.4V
(3)
(4)
V
DD
= 1.65V
I
OL
= 8mA
I
OH
= 9mA
V
DD
= 2.3V
(5)
Min.
V
DD
- 0.1
—
0.8
1
1.2
1.8
—
—
—
—
—
—
Typ.
—
0.55
—
—
—
—
—
0.25
—
—
—
—
Max.
—
—
—
—
—
—
0.2
—
0.3
0.4
0.45
0.6
Unit
V
OH
Output HIGH Voltage
V
V
OL
Output LOW Voltage
V
NOTES:
1. V
IL
and V
IH
must be within
2. Demonstrates operation for
3. Demonstrates operation for
4. Demonstrates operation for
5. Demonstrates operation for
the min. or max. range shown in the DC ELECTRICAL CHARACTERISTICS table for the appropriate V
DD
range. T
A
= -40°C to +85°C.
nominal V
DD
= 1.2V.
nominal V
DD
= 1.5V.
nominal V
DD
= 1.8V.
nominal V
DD
= 2.5V.
OPERATING CHARACTERISTICS, T
A
= 25°C
Symbol
C
PD
C
PD
Parameter
Power Dissipation Capacitance
per Output, Outputs Enabled
Power Dissipation Capacitance
per Output, Outputs Disabled
Test Conditions
C
L
= 0pF
f = 10MHz
V
DD
= 0.8V
22
1
V
DD
= 1.2V
23
1
V
DD
= 1.5V
24
1
V
DD
= 1.8V
25
1
V
DD
= 2.5V
29
1
Unit
pF
pF
SWITCHING CHARACTERISTICS
(1)
V
DD
= 0.8V V
DD
= 1.2V±0.1V
Symbol
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
Parameter
Propagation Delay
xAx to xBx or xBx to xAx
Output Enable Time
xOE to xAx or xBx
Output Disable Time
xOE to xAx or xBx
Typ.
5.6
10
12.8
Min.
0.5
0.7
0.8
Max.
3.1
4.6
6.8
V
DD
= 1.5V±0.1V
Min.
0.5
0.7
0.8
Max.
2
3.1
5
V
DD
= 1.8V±0.15V
Min.
0.5
0.7
0.8
Typ.
1.5
2.1
3.4
Max.
2
3.1
4.8
V
DD
= 2.5V±0.2V
Min.
0.4
0.7
0.5
Max.
1.9
2.6
2.9
Unit
ns
ns
ns
NOTE:
1. See TEST CIRCUITS AND WAVEFORMS. T
A
= -40°C to +85°C.
5
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