74LCXH32245 PDF даташит
Спецификация 74LCXH32245 изготовлена «Fairchild Semiconductor» и имеет функцию, называемую «Low Voltage 32-Bit Bidirectional Transceiver with 5V Tolerant Inputs and Outputs with Bushold». |
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Детали детали
Номер произв | 74LCXH32245 |
Описание | Low Voltage 32-Bit Bidirectional Transceiver with 5V Tolerant Inputs and Outputs with Bushold |
Производители | Fairchild Semiconductor |
логотип |
8 Pages
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April 2002
Revised August 2003
74LCXH32245
Low Voltage 32-Bit Bidirectional Transceiver
with 5V Tolerant Inputs and Outputs with Bushold
General Description
The LCXH32245 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 LCXH32245 data inputs include bushold, eliminating
the need for external pull-up/down resistors to hold unused
inputs.
The LCXH32245 is fabricated with an advanced CMOS
technology to achieve high speed operation while maintain-
ing CMOS low power dissipation.
Features
s 5V tolerant inputs and outputs
s 2.3V to 3.6V VCC specifications provided
s 4.5 ns tPD max (VCC = 3.3V), 20 µA ICC max
s Power-off high impedance inputs and outputs
s Bushold on inputs eliminates the need for external
pull-up/down resistors
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
74LCXH32245G
(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
© 2003 Fairchild Semiconductor Corporation DS500727
www.fairchildsemi.com
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Connection Diagram
(Top Thru View)
Truth Tables
Inputs
OE1
L
L
H
T/R1
L
H
X
Inputs
OE2
T/R2
LL
LH
HX
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = High Impedance
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
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
Pin Descriptions
Pin Names
Description
OEn
T/Rn
A0–A31
B0–B31
Output Enable Input (Active LOW)
Transmit/Receive Input
Side A Inputs/3-STATE Outputs
Side B Inputs/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 VCC1 VCC1 A4 A5
D B7 B6 GND GND A6 A7
E B9 B8 GND GND A8 A9
F B11 B10 VCC1 VCC1 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 VCC2 VCC2 A20 A21
M B23 B22 GND GND A22 A23
N B25 B24 GND GND A24 A25
P B27 B26 VCC2 VCC2 A26 A27
R B29 B28 GND GND A28 A29
T B30 B31 T/R4 OE4 A31 A30
Inputs
OE3
L
L
H
T/R3
L
H
X
Inputs
OE4
L
L
H
T/R4
L
H
X
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
Outputs
Bus B24–B31 Data to Bus A24–A31
Bus B24–A31 Data to Bus B24–B31
HIGH–Z State on A24–A31,B24–B31
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Logic Diagrams
Note: Please note that these diagrams are provided only for the understanding of logic operations and should not be used to estimate propagation delays.
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Номер в каталоге | Описание | Производители |
74LCXH32245 | Low Voltage 32-Bit Bidirectional Transceiver with 5V Tolerant Inputs and Outputs with Bushold | Fairchild Semiconductor |
74LCXH32245G | Low Voltage 32-Bit Bidirectional Transceiver with 5V Tolerant Inputs and Outputs with Bushold | Fairchild Semiconductor |
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