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Спецификация 74LCX32245 изготовлена «Fairchild Semiconductor» и имеет функцию, называемую «Low Voltage 32-Bit Bidirectional Transceiver with 5V Tolerant Inputs and Outputs». |
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Детали детали
Номер произв | 74LCX32245 |
Описание | Low Voltage 32-Bit Bidirectional Transceiver with 5V Tolerant Inputs and Outputs |
Производители | Fairchild Semiconductor |
логотип |
8 Pages
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November 2001
Revised June 2002
74LCX32245
Low Voltage 32-Bit Bidirectional Transceiver
with 5V Tolerant Inputs and Outputs
General Description
The LCX32245 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) VCC 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 LCX32245 is fabricated with an advanced CMOS tech-
nology to achieve high speed operation while maintaining
CMOS low power dissipation.
Features
s 5V tolerant inputs and outputs
s 2.3V–3.6V VCC specifications provided
s 4.5 ns tPD max (VCC = 3.3V), 20 µA ICC max
s Power down high impedance inputs and outputs
s Supports live insertion/withdrawal (Note 1)
s ±24 mA output drive (VCC = 3.0V)
s Uses 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)
Note 1: To ensure the high-impedance state during power up or down, OE
should be tied to VCC through a pull-up resistor: the minimum value or the
resistor is determined by the current-sourcing capability of the driver.
Ordering Code:
Order Number Package Number
Package Description
74LCX32245G
(Note 2)(Note 3)
BGA96A
96-Ball Fine-Pitch Ball Grid Array (FBGA), JEDEC MO-205, 5.5mm Wide
Note 2: Ordering code “G” indicates Trays.
Note 3: Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Logic Symbol
© 2002 Fairchild Semiconductor Corporation DS500428
www.fairchildsemi.com
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Connection Diagram
(Top Thru View)
Truth Tables
Inputs
OE1
L
L
H
T/R1
L
H
X
Outputs
Bus B0–B7 Data to Bus A0–A7
Bus A0–A7 Data to Bus B0–B7
HIGH Z State on A0–A7, B0–B7
Pin Descriptions
Pin Names
Description
OEn
T/Rn
A0–A31
B0–B31
Output Enable Input (Active LOW)
Transmit/Receive Input
Side A Inputs or 3-STATE Outputs
Side B Inputs or 3-STATE Outputs
FBGA Pin Assignments
123456
A B1 B0 T/R1 OE1 A0 A1
B B3 B2 GND GND A2 A3
C B5 B4 VCC VCC A4 A5
D B7 B6 GND GND A6 A7
E B9 B8 GND GND A8 A9
F B11 B10 VCC VCC A10 A11
G B13 B12 GND GND A12 A13
H B14 B15 T/R2 OE2 A15 A14
J B17 B16 T/R3 OE3 A16 A17
K B19 B18 GND GND A18 A19
L B21 B20 VCC VCC A20 A21
M B23 B22 GND GND A22 A23
N B25 B24 GND GND A24 A25
P B27 B26 VCC VCC A26 A27
R B29 B28 GND GND A28 A29
T B30 B31 T/R4 OE4 A31 A30
Inputs
OE2
L
L
H
T/R2
L
H
X
Outputs
Bus B8–B15 Data to Bus A8–A15
Bus A8–A15 Data to Bus B8–B15
HIGH Z State on A8–A15, B8–B15
Inputs
OE3
T/R3
LL
LH
HX
H = HIGH Voltage Level
L = LOW Voltage Level
Outputs
Bus B16–B23 Data to Bus A16–A23
Bus A16–A23 Data to Bus B16–B23
HIGH Z State on A16–A23, B16–B23
Inputs
OE4
T/R4
Outputs
L L Bus B24–B31 Data to Bus A24–A31
L H Bus A24–A31 Data to Bus B24–B31
H X HIGH Z State on A24–A31, B24–B31
X = Immaterial (HIGH or LOW, inputs and I/O’s may not float)
Z = High Impedance
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Logic Diagrams
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Номер в каталоге | Описание | Производители |
74LCX32244 | Low Voltage 32-Bit Buffer/Line Driver with 5V Tolerant Inputs and Outputs | Fairchild Semiconductor |
74LCX32244G | Low Voltage 32-Bit Buffer/Line Driver with 5V Tolerant Inputs and Outputs | Fairchild Semiconductor |
74LCX32245 | Low Voltage 32-Bit Bidirectional Transceiver with 5V Tolerant Inputs and Outputs | Fairchild Semiconductor |
74LCX32245G | Low Voltage 32-Bit Bidirectional Transceiver with 5V Tolerant Inputs and Outputs | Fairchild Semiconductor |
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