74LVT2245MSA PDF даташит
Спецификация 74LVT2245MSA изготовлена «Fairchild Semiconductor» и имеет функцию, называемую «Low Voltage Octal Bidirectional Transceiver with 3-STATE Inputs/Outputs and 25 Series Resistors in the B Port Outputs». |
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Детали детали
Номер произв | 74LVT2245MSA |
Описание | Low Voltage Octal Bidirectional Transceiver with 3-STATE Inputs/Outputs and 25 Series Resistors in the B Port Outputs |
Производители | Fairchild Semiconductor |
логотип |
9 Pages
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November 1999
Revised January 2000
74LVT2245 • 74LVTH2245
Low Voltage Octal Bidirectional Transceiver with
3-STATE Inputs/Outputs and 25Ω Series Resistors
in the B Port Outputs
General Description
The LVT2245 and LVTH2245 contain eight non-inverting
bidirectional buffers with 3-STATE outputs and are
intended for bus-oriented applications. The Transmit/
Receive (T/R) input determines the direction of data flow
through the bidirectional transceiver. Transmit (active-
HIGH) enables data from A Ports to B Ports; Receive
(active-LOW) enables data from B Ports to A Ports. The
Output Enable input, when HIGH, disables both A and B
Ports by placing them in a high impedance state. The
equivalent 25Ω-series resistor in the B Port helps reduce
output overshoot and undershoot.
The LVTH2245 data inputs include bushold, eliminating the
need for external pull-up resistors to hold unused inputs.
These transceivers are designed for low voltage (3.3V)
VCC applications, but with the capability to provide a TTL
interface to a 5V environment. The LVT2245 and
LVTH2245 are fabricated with an advanced BiCMOS tech-
nology to achieve high speed operation similar to 5V ABT
while maintaining low power dissipation.
Features
s Input and output interface capability to systems at
5V VCC
s Equivalent 25Ω series resistor on B Port outputs
s Bushold data inputs eliminate the need for external pull-
up resistors to hold unused inputs (74LVTH2245), also
available without bushold feature (74LVT2245)
s Live insertion/extraction permitted
s Power Up/Down high impedance provides glitch-free
bus loading
s Outputs source/sink −12 mA/+12 mA on B Port,
−32 mA/+64 mA on A Port
s Latch-up performance exceeds 500 mA
Ordering Code:
Order Number Package Number
Package Description
74LVT2245WM
74LVT2245SJ
M20B
M20D
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide
20-Lead Small Outline Package (SOP), EIAJ TYPE II 5.3mm Wide
74LVT2245MSA
MSA20
20-Lead Shrink Small Outline Package (SSOP), EIAJ TYPE II, 5.3mm Wide
74LVT2245MTC
MTC20
20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
74LVTH2245WM
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide
74LVTH2245SJ
M20D
20-Lead Small Outline Package (SOP), EIAJ TYPE II 5.3mm Wide
74LVTH2245MSA
74LVTH2245MTC
MSA20
MTC20
20-Lead Shrink Small Outline Package (SSOP), EIAJ TYPE II, 5.3mm Wide
20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
© 2000 Fairchild Semiconductor Corporation DS012173
www.fairchildsemi.com
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Logic Symbols
IEEE/IEC
Connection Diagram
Pin Descriptions
Pin Names
Description
OE Output Enable Input
T/R Transmit/Receive Input
A0–A7
B0–B7
Side A Inputs or 3-STATE Outputs
Side B Inputs or 3-STATE Outputs
Truth Table
Inputs
OE T/R
LL
LH
HX
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Outputs
Bus B Data to Bus A
Bus A Data to Bus B
HIGH-Z State
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Absolute Maximum Ratings (Note 1)
Symbol
Parameter
VCC Supply Voltage
VI DC Input Voltage
VO Output Voltage
IIK DC Input Diode Current
IOK DC Output Diode Current
IO DC Output Current
ICC
IGND
TSTG
DC Supply Current per Supply Pin
DC Ground Current per Ground Pin
Storage Temperature
Value
−0.5 to +4.6
−0.5 to +7.0
−0.5 to +7.0
−0.5 to +7.0
−50
−50
64
128
±64
±128
−65 to +150
Conditions
Output in 3-STATE
Output in HIGH or LOW State (Note 2)
VI < GND
VO < GND
VO > VCC Output at HIGH State
VO > VCC Output at LOW State
Units
V
V
V
mA
mA
mA
mA
mA
°C
Recommended Operating Conditions
Symbol
Parameter
Min Max Units
VCC Supply Voltage
VI Input Voltage
IOH HIGH-Level Output Current
2.7 3.6
V
0 5.5 V
A Port
B Port
−32
mA
−12
IOL LOW-Level Output Current
A Port
B Port
64
mA
12
TA Free Air Operating Temperature
−40 +85
°C
∆t/∆V
Input Edge Rate, VIN = 0.8V–2.0V, VCC = 3.0V
0 10 ns/V
Note 1: Absolute Maximum continuous ratings are those values beyond which damage to the device may occur. Exposure to these conditions or conditions
beyond those indicated may adversely affect device reliability. Functional operation under absolute maximum rated conditions is not implied.
Note 2: IO Absolute Maximum Rating must be observed.
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Номер в каталоге | Описание | Производители |
74LVT2245MSA | Low Voltage Octal Bidirectional Transceiver with 3-STATE Inputs/Outputs and 25 Series Resistors in the B Port Outputs | Fairchild Semiconductor |
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