74LVTH16245MEA PDF даташит
Спецификация 74LVTH16245MEA изготовлена «Fairchild Semiconductor» и имеет функцию, называемую «Low Voltage 16-Bit Transceiver with 3-STATE Outputs». |
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Детали детали
Номер произв | 74LVTH16245MEA |
Описание | Low Voltage 16-Bit Transceiver with 3-STATE Outputs |
Производители | Fairchild Semiconductor |
логотип |
6 Pages
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January 1999
Revised November 1999
74LVT16245 • 74LVTH16245
Low Voltage 16-Bit Transceiver with 3-STATE Outputs
General Description
The LVT16245 and LVTH16245 contain sixteen non-invert-
ing bidirectional buffers with 3-STATE outputs and is
intended for bus oriented applications. The device is byte
controlled. Each byte has separate control inputs which
can be shorted together for full 16-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 LVTH16245 data inputs include bushold, eliminating
the need for external pull-up resistors to hold unused
inputs.
These non-inverting transceivers are designed for low-volt-
age (3.3V) VCC applications, but with the capability to pro-
vide a TTL interface to a 5V environment. The LVT16245
and LVTH16245 are fabricated with an advanced BiCMOS
technology 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 Bushold data inputs eliminate the need for external pull-
up resistors to hold unused inputs (74LVTH16245), also
available without bushold feature (74LVT16245).
s Live insertion/extraction permitted
s Power Up/Down high impedance provides glitch-free
bus loading
s Outputs source/sink −32 mA/+64 mA
s Functionally compatible with the 74 series 16245
s Latch-up performance exceeds 500 mA
Ordering Code:
Order Number
Package
Number
Package Description
74LVT16245MEA
MS48A
48-Lead Small Shrink Outline Package (SSOP), JEDEC MO-118, 0.300” Wide
74LVT16245MTD
MTD48
48-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide
74LVTH16245MEA
MS48A
48-Lead Small Shrink Outline Package (SSOP), JEDEC MO-118, 0.300” Wide
74LVTH16245MTD
MTD48
48-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide
Devices also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
Logic Symbol
© 1999 Fairchild Semiconductor Corporation DS500152
www.fairchildsemi.com
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Connection Diagram
Pin Descriptions
Pin Names
Description
OEn
T/Rn
A0–A15
B0–B15
Output Enable Input (Active LOW)
Transmit/Receive Input
Side A Inputs/3-STATE Outputs
Side B Inputs/3-STATE Outputs
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
Inputs
OE2
T/R2
LL
LH
HX
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = High Impedance
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
Functional Description
The LVT16245 and LVTH16245 contain sixteen 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 full 16-bit operation.
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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Absolute Maximum Ratings(Note 1)
Symbol
VCC
VI
VO
Parameter
Supply Voltage
DC Input Voltage
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 Range
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
Recommended Operating Conditions
Conditions
Output in 3-STATE
Output in HIGH or LOW State (Note 2)
VI < GND
VO < GND
Output at HIGH State, VO > VCC
Output at LOW State, VO > VCC
Units
V
V
V
mA
mA
mA
mA
mA
°C
Symbol
Parameter
Min Max Units
VCC Supply Voltage
2.7 3.6
V
VI Input Voltage
0 5.5
V
IOH HIGH-Level Output Current
−32 mA
IOL LOW-Level Output Current
64 mA
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 Ratings must be observed.
DC Electrical Characteristics
Symbol
VIK
VIH
VIL
VOH
VOL
II(HOLD)
(Note 3)
II(OD)
(Note 3)
II
Parameter
Input Clamp Diode Voltage
Input HIGH Voltage
Input LOW Voltage
Output HIGH Voltage
Output LOW Voltage
Bushold Input Minimum Drive
Bushold Input Over-Drive
Current to Change State
Input Current
Control Pins
Data Pins
VCC
(V)
2.7
2.7–3.6
2.7–3.6
2.7–3.6
2.7
3.0
2.7
2.7
3.0
3.0
3.0
3.0
3.0
3.6
3.6
3.6
IOFF
IPU/PD
Power Off Leakage Current
Power Up/Down 3-STATE
Output Current
IOZL
IOZL (Note 3)
IOZH
3-STATE Output Leakage Current
3-STATE Output Leakage Current
3-STATE Output Leakage Current
0
0–1.5
3.6
3.6
3.6
TA = −40°C to +85°C
Min Max
−1.2
2.0
0.8
VCC − 0.2
2.4
2.0
0.2
0.5
0.4
0.5
0.55
75
−75
500
−500
10
±1
−5
1
±100
±100
−5
−5
5
Units
V
V
V
V
V
µA
µA
µA
µA
µA
µA
µA
µA
Conditions
II = −18 mA
VO ≤ 0.1V or
VO ≥ VCC − 0.1V
IOH = −100 µA
IOH = −8 mA
IOH = −32 mA
IOL = 100 µA
IOL = 24 mA
IOL = 16 mA
IOL = 32 mA
IOL = 64 mA
VI = 0.8V
VI = 2.0V
(Note 4)
(Note 5)
VI = 5.5V
VI = 0V or VCC
VI = 0V
VI = VCC
0V ≤ VI or VO ≤ 5.5V
VO = 0.5V to 3.0V
VI = GND or VCC
VO = 0.5V
VO = 0.0V
VO = 3.0V
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