IDT74LVCH32245A
3.3V CMOS 32-BIT BUS TRANSCEIVER W/ 3-STATE OUTPUTS
EXTENDED COMMERCIAL TEMPERATURE RANGE
IDT74LVCH32245A
3.3V CMOS 32-BIT
BUS TRANSCEIVER
WITH 3-STATE OUTPUTS,
5 VOLT TOLERANT I/O, BUS-HOLD
FEATURES:
–
–
–
–
–
–
–
–
–
Typical t
SK
(o) (Output Skew) < 250ps
ESD > 2000V per MIL-STD-883, Method 3015;
> 200V using machine model (C = 200pF, R = 0)
0.8mm pitch LFBGA package, 96 balls
Extended commercial range of -40°C to +85°C
V
CC
= 3.3V ±0.3V, Normal Range
V
CC
= 2.7V to 3.6V, Extended Range
CMOS power levels (0.4µ W typ. static)
All inputs, outputs and I/O are 5 Volt tolerant
Supports hot insertion
DESCRIPTION:
This 32-bit bus transceiver is built using advanced dual metal CMOS
technology. This high-speed, low power transceiver is ideal for asynchro-
nous communication between two busses (A and B). The Direction and
Output Enable controls are designed to operate the device as either four
independent 8-bit transceivers or one 32-bit transceiver. The direction
control pins (DIR) control the direction of data flow. The output enable pins
(OE) override the direction control and disable both ports. All inputs are
designed with hysteresis for improved noise margin.
All pins can be driven from either 3.3V or 5V devices. This feature allows
the use of this device as a translator in a mixed 3.3V/5V supply system.
The LVCH32245A has been designed with a
±
24mA output driver. This
driver is capable of driving a moderate to heavy load while maintaining
speed performance
The LVCH32245A has “bus-hold” which retains the inputs’ last state
whenever the input goes to a high impedance. This prevents floating inputs
and eliminates the need for pull-up/down resistors.
Drive Features for LVCH32245A:
– Balanced Output Drivers: ±24mA
– Reduced system switching noise
APPLICATIONS:
• 5V and 3.3V mixed voltage systems
• Data communication and telecommunication systems
FUNCTIONAL BLOCK DIAGRAM
1
D IR
A3
A4
3
D IR
1
OE
J3
J4
3
OE
3
A
1
J5
J2
1
A
1
A5
A2
1
B
1
3
B
1
TO SEVEN OTHER CHANNNELS
TO SEVEN OTHER CHANNNELS
2
D IR
H3
4
D IR
H4
T3
T4
2
OE
2
A
1
E5
E2
4
OE
4
A
1
N5
N2
2
B
1
4
B
1
TO SEVEN OTHER CHANNNELS
TO SEVEN OTHER CHANNNELS
EXTENDED COMMERCIAL TEMPERATURE RANGE
1
c
1999 Integrated Device Technology, Inc.
FEBRUARY 2000
DSC-4767/-
IDT74LVCH32245A
3.3V CMOS 32-BIT BUS TRANSCEIVER W/ 3-STATE OUTPUTS
EXTENDED COMMERCIAL TEMPERATURE RANGE
PIN CONFIGURATION
3
A
6
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
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
GN D
V
CC
GN D
GN D
V
CC
GN D
2
OE
3
OE
GN D
V
CC
GN D
GN D
V
CC
GN D
4
OE
3
1
D IR
GN D
V
CC
GN D
GN D
V
CC
GN D
2
D IR
3
D IR
GN D
V
CC
GN D
GN D
V
CC
GN D
4
D IR
2
1
B
1
1
B
3
1
B
5
1
B
7
2
B
1
2
B
3
2
B
5
2
B
8
3
B
1
3
B
3
3
B
5
3
B
7
4
B
1
4
B
3
4
B
5
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
32245
LFBGA
TOP VIEW
96 BALL LFBGA PACKAGE LAYOUT
1.5 mm Max.
1.4 mm Nom.
1.3 mm 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
c
2
IDT74LVCH32245A
3.3V CMOS 32-BIT BUS TRANSCEIVER W/ 3-STATE OUTPUTS
EXTENDED COMMERCIAL TEMPERATURE RANGE
ABSOLUTE MAXIMUM RATINGS
Symbol
V
TERM
T
STG
I
OUT
I
IK
I
OK
I
CC
I
SS
Description
Terminal Voltage with Respect to GND
Storage Temperature
DC Output Current
Continuous Clamp Current,
V
I
< 0 or V
O
< 0
Continuous Current through
each V
CC
or GND
(1)
Unit
V
°C
mA
mA
mA
LVC Link
PIN DESCRIPTION
Pin Names
xOE
xDIR
xAx
xBx
Description
Output Enable Input (Active LOW)
Direction Control Input
Side A Inputs or 3-State Outputs
(1)
Side B Inputs or 3-State Outputs
(1)
Max.
– 0.5 to +6.5
– 65 to +150
– 50 to +50
– 50
±100
NOTE:
1. These pins have “Bus-hold”. All other pins are standard inputs,
outputs, or I/Os.
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.
FUNCTION TABLE
(1)
Inputs
xOE
L
L
H
xDIR
L
H
X
Outputs
Bus B Data to Bus A
Bus A Data to Bus B
High Z State
CAPACITANCE
(T
A
= +25 C, f = 1.0MHz)
o
Symbol
C
IN
C
OUT
C
I/O
Parameter
(1)
Input Capacitance
Output
Capacitance
I/O Port
Capacitance
Conditions
V
IN
= 0V
V
OUT
= 0V
V
IN
= 0V
Typ.
4.5
6.5
6.5
Max.
6
8
8
Unit
pF
pF
pF
LVC Link
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don’t Care
Z = High-Impedance
NOTE:
1. As applicable to the device type.
BUS-HOLD CHARACTERISTICS
Symbol
I
BHH
I
BHL
I
BHH
I
BHL
I
BHHO
I
BHLO
LVC Link
Parameter
(1)
Bus-Hold Input Sustain Current
Bus-Hold Input Sustain Current
Bus-Hold Input Overdrive Current
V
CC
= 3.0V
V
CC
= 2.3V
V
CC
= 3.6V
Test Conditions
V
I
= 2.0V
V
I
= 0.8V
V
I
= 1.7V
V
I
= 0.7V
V
I
= 0 to 3.6V
Min.
– 75
75
—
—
—
Typ.
(2)
—
—
—
—
—
Max.
—
—
—
—
± 500
Unit
µA
µA
µA
NOTES:
1. Pins with Bus-hold are identified in the pin description.
2. Typical values are at V
CC
= 3.3V, +25°C ambient.
3
IDT74LVCH32245A
3.3V CMOS 32-BIT BUS TRANSCEIVER W/ 3-STATE OUTPUTS
EXTENDED COMMERCIAL TEMPERATURE RANGE
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Operating Condition: T
A
= –40
O
C to +85
O
C
Symbol
V
IH
V
IL
I
IH
I
IL
I
OZH
I
OZL
I
OFF
V
IK
V
H
I
CCL
I
CCH
I
CCZ
∆I
CC
Parameter
Input HIGH Voltage Level
Input LOW Voltage Level
Input Leakage Current
High Impedance Output Current
(3-State Output pins)
Input/Output Power Off Leakage
Clamp Diode Voltage
Input Hysteresis
Quiescent Power Supply Current
V
CC
= 0V, V
IN
or V
O
≤
5.5V
V
CC
= 2.3V, I
IN
= – 18mA
V
CC
= 3.3V
V
CC
= 3.6V
V
IN
= GND or V
CC
3.6
≤
V
IN
≤
5.5V
(2)
Quiescent Power Supply
Current Variation
One input at V
CC
- 0.6V
other inputs at V
CC
or GND
—
—
—
—
—
—
—
– 0.7
100
—
—
—
±50
– 1.2
—
10
10
500
µA
LVC Link
Test Conditions
V
CC
= 2.3V to 2.7V
V
CC
= 2.7V to 3.6V
V
CC
= 2.3V to 2.7V
V
CC
= 2.7V to 3.6V
V
CC
= 3.6V
V
CC
= 3.6V
V
I
= 0 to 5.5V
V
O
= 0 to 5.5V
Min.
1.7
2
—
—
—
—
Typ.
(1)
—
—
—
—
—
—
Max.
—
—
0.7
0.8
±5
±10
Unit
V
V
µA
µA
µA
V
mV
µA
NOTES:
1. Typical values are at V
CC
= 3.3V, +25°C ambient.
2. This applies in the disabled state only.
OUTPUT DRIVE CHARACTERISTICS
Symbol
V
OH
Parameter
Output HIGH Voltage
V
CC
Test Conditions
(1)
= 2.3V to 3.6V
I
OH
= – 0.1mA
I
OH
= – 6mA
I
OH
= – 12mA
Min.
V
CC
– 0.2
2
1.7
2.2
2.4
I
OH
= – 24mA
I
OL
= 0.1mA
I
OL
= 6mA
I
OL
= 12mA
V
CC
= 2.7V
V
CC
= 3.0V
I
OL
= 12mA
I
OL
= 24mA
2.2
—
—
—
—
—
Max.
—
—
—
—
—
—
0.2
0.4
0.7
0.4
0.55
LVC Link
Unit
V
V
CC
= 2.3V
V
CC
= 2.3V
V
CC
= 2.7V
V
CC
= 3.0V
V
CC
= 3.0V
V
OL
Output LOW Voltage
V
CC
= 2.3V to 3.6V
V
CC
= 2.3V
V
NOTE:
1. V
IH
and V
IL
must be within the min. or max. range shown in the DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE table for the
appropriate V
CC
range. T
A
= – 40°C to +85°C.
4
IDT74LVCH32245A
3.3V CMOS 32-BIT BUS TRANSCEIVER W/ 3-STATE OUTPUTS
EXTENDED COMMERCIAL TEMPERATURE RANGE
OPERATING CHARACTERISTICS, VCC = 3.3V
±
0.3V, TA = 25°C
Symbol
C
PD
C
PD
Parameter
Power Dissipation Capacitance per Transceiver Outputs enabled
Power Dissipation Capacitance per Transceiver Outputs disabled
(1)
V
CC
= 2.7V
Symbol
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
t
PZH
t
PZL
t
PHZ
t
PLZ
t
SK
(o)
Parameter
Propagation Delay
xAx to xBx, xBx to xAx
Output Enable Time
xOE to xAx or xBx
Output Disable Time
xOE to xAx or xBx
Output Enable Time
xDIR to xAx or xBx
Output Disable Time
xDIR to xAx or xBx
Output Skew
(2)
Min.
1.5
1.5
1.5
1.5
1.5
—
Max.
4.7
6.7
7.1
7
7.4
—
V
CC
= 3.3V±0.3V
Min.
1
1.5
1.5
1.5
1.5
—
Max.
4
5.5
6.6
5.5
6.6
500
Unit
ns
ns
ns
ns
ns
ps
Test Conditions
C
L
= 0pF, f = 10Mhz
Typical
76
8
Unit
pF
pF
SWITCHING CHARACTERISTICS
NOTES:
1. See test circuits and waveforms. T
A
= – 40°C to + 85°C.
2. Skew between any two outputs of the same package and switching in the same direction.
5
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