Preliminary
74LCXH322245 Low Voltage 32-Bit Bidirectional Transceiver with 5V Tolerant Inputs and Outputs and 26Ω Series
Resistors in A Outputs (Preliminary)
August 2001
Revised August 2001
74LCXH322245
Low Voltage 32-Bit Bidirectional Transceiver
with 5V Tolerant Inputs and Outputs
and 26
Ω
Series Resistors in A Outputs (Preliminary)
General Description
The LCXH322245 contains thirty-two non-inverting bidirec-
tional buffers with 3-STATE outputs and is intended for bus
oriented applications. The device is designed for low volt-
age (2.5V or 3.3V) V
CC
applications with capability of inter-
facing to a 5V signal environment. The device is byte
controlled. Each byte has separate control inputs which
could be shorted together for full 32-bit operation. The T/R
inputs determine the direction of data flow through the
device. The OE inputs disable both the A and B ports by
placing them in a high impedance state. The 26
Ω
series
resistor in the A Port output helps reduce output overshoot
and undershoot.
The LCXH322245 is fabricated with an advanced CMOS
technology to achieve high speed operation while maintain-
ing CMOS low power dissipation.
Features
s
5V tolerant control inputs
s
2.3V–3.6V V
CC
specifications provided
s
4.5 ns t
PD
max (V
CC
=
3.3V), 20
µ
A I
CC
max
s
Power down high impedance outputs
s
Equivalent 26
Ω
series resistor on A Port outputs
s
Bushold on inputs eliminates the need for external
pull-up/pull-down resistors
s
±
24 mA output drive B Port (V
CC
=
3.0V)
s
Implements patented noise/EMI reduction circuitry
s
Latch-up performance exceeds 500 mA
s
ESD performance:
Human body model
>
2000V
Machine model
>
200V
s
Packaged in plastic Fine-Pitch Ball Grid Array (FBGA)
(Preliminary)
Ordering Code:
Order Number
74LCXH322245GX
(Note 1)
Package
Number
BGA96A
(Preliminary)
Package Description
96-Ball Fine-Pitch Ball Grid Array (FBGA), JEDEC MO-205, 5.5mm Wide
[TAPE and REEL]
Note 1:
BGA package available in Tape and Reel only.
Logic Symbol
© 2001 Fairchild Semiconductor Corporation
DS500593
www.fairchildsemi.com
Preliminary
74LCXH322245
Functional Description
The LCXH322245 contain thirty-two non-inverting bidirectional buffers with 3-STATE outputs. The device is byte controlled
with each byte functioning identically, but independent of the other. The control pins can be shorted together to obtain 16-bit
or full 32-bit operation.
Logic Diagrams
Byte 1
Byte 3
Byte 2
Byte 4
V
CC1
is associated with Bytes 1 and 2.
V
CC2
is associated with Bytes 3 and 4.
Note:
Please note that these diagrams are provided only for the understanding of logic operations and should not be used to estimate propagation delays.
3
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Preliminary
74LCXH322245
Absolute Maximum Ratings
(Note 2)
Symbol
V
CC
V
I
V
O
I
IK
I
OK
I
O
I
CC
I
GND
T
STG
Parameter
Supply Voltage
T/R, OE
I/O Ports
DC Output Voltage
DC Input Diode Current
DC Output Diode Current
DC Output Source/Sink Current
DC Supply Current per Supply Pin
DC Ground Current per Ground Pin
Storage Temperature
Value
Conditions
Units
V
V
Output in HIGH or LOW State (Note 3)
V
I
<
GND
V
O
<
GND
V
O
>
V
CC
V
mA
mA
mA
mA
mA
−
0.5 to
+
7.0
−
0.5 to
+
7.0
−
0.5 to V
CC
+
0.5
−
0.5 to V
CC
+
0.5
−
50
−
50
+
50
±
50
±
100
±
100
−
65 to
+
150
°
C
Recommended Operating Conditions
(Note 4)
Symbol
V
CC
V
I
V
O
I
OH
/I
OL
Supply Voltage
Input Voltage
Output Voltage
Output Current – B Outputs
HIGH or LOW State
3-STATE
V
CC
=
3.0V
−
3.6V
V
CC
=
2.7V
−
3.0V
V
CC
=
2.3V
−
2.7V
Output Current in I
OH
/I
OL
– A Outputs
V
CC
=
3.0V
−
3.6V
V
CC
=
2.7V
−
3.0V
V
CC
=
2.3V
−
2.7V
T
A
Free-Air Operating Temperature
Input Edge Rate, V
IN
=
0.8V–2.0V, V
CC
=
3.0V
Parameter
Operating
Data Retention
Min
2.0
1.5
0
0
0
Max
3.6
3.6
V
CC
V
CC
5.5
Units
V
V
V
±
24
±
12
±
8
±
12
±
8
±
4
−
40
0
85
10
mA
°
C
ns/V
∆
t/
∆
V
Note 2:
The Absolute Maximum Ratings are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated
at these limits. The parametric values defined in the Electrical Characteristics tables are not guaranteed at the Absolute Maximum Ratings. The “Recom-
mended Operating Conditions” table will define the conditions for actual device operation.
Note 3:
I
O
Absolute Maximum Rating must be observed.
Note 4:
Floating or unused control inputs must be HIGH or LOW.
Note:
An external driver must source at least the specified current to switch from LOW-to-HIGH.
Note:
An external driver must sink at least the specified current to switch from HIGH-to-LOW.
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