74LVT245BB Datasheet PDF - Diodes
| Part Number | 74LVT245BB | |
| Description | 3.3 V OCTAL BUS TRANSCEIVER | |
| Manufacturers | Diodes | |
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74LVT245BB
3.3 V OCTAL BUS TRANSCEIVER WITH 3 STATE OUTPUTS
Description
The 74LVT245BB is an octal transceiver designed for asynchronous
communication between data buses. The device transmits data from
the A bus to the B bus or from the B bus to the A bus, depending on
the logic level at the direction-control (DIR) input. The output-enable
(OE) Pin can be used to disable the device so the buses effectively
are isolated.
The device is designed for operation with a power supply range of
2.7V to 3.6V.
The inputs are tolerant to 5.5V allowing this device to be used in a
mixed voltage environment. The device is fully specified for partial
power down applications using IOFF. The IOFF circuitry disables the
output preventing damaging current backflow when the device is
powered down.
Features
Supply Voltage Range from 2.7V to 3.6V
Outputs Sink 64mA or Source 32mA
CMOS Low Power Consumption
IOFF Supports Partial Power-Down Operation
Inputs or Outputs Accept Up to 5.5V
Inputs Include Bus-Hold – No Resistors on Unused Inputs.
Inputs can be Driven by 3.3V or 5V Allowing for Mixed Voltage
Applications
Schmitt Trigger Action at All Inputs
Outputs in 3-State During Power Up – Allows for Hot Insertion
Outputs Have Less than 125µA Leakage when Forced to 5.5V
ESD Protection Tested per JESD 22
Exceeds 200-V Machine Model (A115)
Exceeds 2000-V Human Body Model (A114)
Exceeds 1000-V Charged Device Model (C101)
Latch-Up Exceeds 500mA per JESD 78, Class II
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Pin Assignments
DIR
A0
A1
A2
A3
A4
A5
A6
A7
GND
( Top View )
1 20
2 19
3 18
4 17
5 16
6 15
7 14
8 13
9 12
10 11
TSSOP-20
Vcc
OE
B0
B1
B2
B3
B4
B5
B6
B7
( Top Transparent View)
terminal 1
index area
A0 2
A1 3
A2 4
A3 5
A4 6
A5 7
A6 8
A7 9
19 OE
18 B0
17 B1
16 B2
15 B3
14 B4
13 B5
12 B6
QFN-20
Applications
General Purpose Logic
Bus Driving
Power Down Signal Isolation
Wide Array of Products such as:
Servers, PCs, Notebooks, Netbooks, Ultrabooks
Networking Computer Peripherals, Hard Drives, CD/DVD
ROM
TVs, DVDs, DVRs, Set Top Boxes
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen and Antimony free,
"Green" and Lead-Free.
3. Halogen and Antimony free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
74LVT245BB
Document number: DS37550 Rev. 1 - 2
1 of 10
www.diodes.com
June 2016
© Diodes Incorporated
|
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74LVT245BB
Switching Characteristics (Figure 1)
Symbol
Parameter
tPLH LOW to HIGH Propagation Delay AN to BN or BN to AN
tPHL HIGH to LOW Propagation Delay AN to BN or BN to AN
tPZH Z-State to HIGH Enable Time OE to AN or OE to BN
tPZL Z-State to LOW Enable Time OE to AN or OE to BN
tPHZ HIGH to Z-State Disable Time OE to AN or OE to BN
tPLZ LOW to Z-State Disable Time OE to AN or OE to BN
VCC
2.7V
3.3V ± 0.3
2.7V
3.3V ± 0.3
2.7V
3.3V ± 0.3
2.7V
3.3V ± 0.3
2.7V
3.3V ± 0.3
2.7V
3.3V ± 0.3
TA = -40°C to +85°C
Min Typ Max
— — 5.5
1.2 2.4 4.8
— — 4.7
1.2 2.4 4.4
— — 8.9
1.3 3.3 7.7
— — 6.9
1.7 3.2 6.4
— — 6.5
2.2 3.6 6.0
— — 5.5
2.2 3.4 5.5
Unit
ns
ns
ns
Package Characteristics
Symbol
θJA
θJC
θJA
θJC
Parameter
Thermal Resistance
Junction-to-Ambient
Thermal Resistance
Junction-to-Case
Thermal Resistance
Junction-to-Ambient
Thermal Resistance
Junction-to-Case
Package
TSSOP-20
TSSOP-20
V-QFN4525-20
V-QFN4525-20
Test Conditions
Min
Typ.
Max
(Note 10)
— 74 —
(Note 10)
— 15 —
(Note 10)
— 67 —
(Note 10)
— 20 —
Unit
°C/W
°C/W
°C/W
°C/W
Note:
10. Test conditions for TSSOP-20 and V-QFN4525-20: Devices mounted on 4 layer FR-4 substrate PC board, 2oz copper, with minimum recommended
pad layout per JESD 51-7.
74LVT245BB
Document number: DS37550 Rev. 1 - 2
5 of 10
www.diodes.com
June 2016
© Diodes Incorporated
Preview 5 Page |
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| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ 74LVT245BB.PDF Datasheet ] | |
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