SN74ABT18245ADLG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
SN74ABT18245ADLG4 is an 18-bit non-inverting bidirectional bus transceiver with dual scan test support from Texas Instruments in an SSOP-56 package. Operates at 5 V with direction control and boundary scan for board-level testing. Available worldwide with fast shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 56
- Lifecycle
- OBSOLETE
- Datasheet
- SN74ABT18245ADLG4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of SN74ABT18245ADLG4?
- 18-bit bidirectional bus transceiver with common direction control for high-density data bus implementations
- Integrated boundary scan (JTAG) dual scan test device enables board-level fault isolation without physical probing
- 5 V ABT family logic with 50 pF load drive capability for robust backplane and PCB bus driving
- SSOP-56 package integrates 18 transceiver channels in a compact surface-mount footprint
What is SN74ABT18245ADLG4 used for?
The SN74ABT18245ADLG4 is designed for high-density digital backplanes and multi-board systems where 18-bit data buses require buffering and level-matched driving between subsystems at 5 V logic levels. Its boundary scan support makes it valuable in complex PCB assemblies requiring IEEE 1149.1 JTAG test access for automated board-level diagnostics. Embedded computing platforms, industrial controllers, and networking equipment benefit from its ABT-family speed and robust bus drive capability.
What are the specifications of SN74ABT18245ADLG4?
| Pbfree Code | Yes |
| YTEOL | 0 |
| Additional Feature | WITH DIRECTION CONTROL |
| Control Type | COMMON CONTROL |
| Count Direction | BIDIRECTIONAL |
| Family | ABT |
| JESD-30 Code | R-PDSO-G56 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | BOUNDARY SCAN BUS TRANSCEIVER |
| Max I(ol) | 0.064A |
| Number of Bits | 9 |
| Number of Functions | 2 |
| Number of Ports | 2 |
| Output Characteristics | 3-STATE |
| Output Polarity | TRUE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SSOP56,.4 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, SHRINK PITCH |
| Packing Method | TUBE |
| Peak Reflow Temperature (Cel) | 260 |
| Power Supply Current-Max (ICC) | 38mA |
| Prop. Delay@Nom-Sup | 5.4ns |
| Propagation Delay (tpd) | 5.4ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 4.5V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | BICMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.635mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| HTS Code | 8542.39.00.60 |
Where can I find the SN74ABT18245ADLG4 datasheet?
SN74ABT18245ADLG4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for SN74ABT18245ADLG4?
Compatible alternatives and drop-in replacements for SN74ABT18245ADLG4:
Bus Transceiver, ABT Series, 18-Func, 9-Bit, True Output, BICMOS, PDSO56
Frequently Asked Questions
How does the boundary scan feature of the SN74ABT18245ADLG4 simplify board-level testing compared to a standard transceiver?
The dual scan test capability implements IEEE 1149.1 JTAG boundary scan, allowing automated testers to drive and sample all 18 data bus lines through the TAP interface without physical bed-of-nails probing. This reduces test fixture cost and enables in-circuit testing even after soldering in dense SSOP-56 assemblies.
What load capacitance does the SN74ABT18245ADLG4 support, and how does this affect bus propagation delay?
The device is specified with a 50 pF load capacitance. At this load, the ABT family typically achieves propagation delays below 4 ns, enabling reliable data transfers on 5 V buses running at clock frequencies up to 100 MHz in backplane environments with multiple transceiver loads.
For a design requiring 36-bit bus width, how many SN74ABT18245ADLG4 devices are needed and how does that fit an SSOP board layout?
Two SN74ABT18245ADLG4 devices cover a 36-bit bus, with each handling 18 bits. Each SSOP-56 package occupies approximately 10 mm × 8 mm, so both devices together require roughly 160 mm² of PCB area — far less than equivalent DIP or SOIC packages for the same channel count.
How does the direction control pin function in bidirectional bus applications using the SN74ABT18245ADLG4?
A single DIR pin controls data flow direction for all 18 channels simultaneously (common control). Pulling DIR high enables bus-A to bus-B transmission, while pulling it low reverses the path. This common control reduces GPIO overhead compared to per-channel direction control on simple 8-bit transceivers.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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