SN74ALS645A-1DWIn StockTexas Instruments
Texas Instruments SN74ALS645A-1DW is an 8-bit non-inverting bidirectional bus transceiver with ALS TTL logic, 5V supply, 50pF load capacitance, and 20-pin SOIC package. From $0.44 in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Other
- Pin Count
- 20
- Lifecycle
- OBSOLETE
- Datasheet
- SN74ALS645A-1DW Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.4419(MOQ 1)
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 8-bit non-inverting bidirectional bus transceiver with common direction control
- Advanced Low-power Schottky (ALS) TTL logic family for reliable 5V operation
- 20-pin SOIC (R-PDSO-G20) surface-mount package for compact PCB integration
- Supports 24mA output sink current (I_OL) for robust bus driving capability
- Designed for high-speed data transfer between two bidirectional data buses
Applications
The SN74ALS645A-1DW is widely used in microprocessor and microcontroller systems to interface between data buses operating at different drive strengths. It is suitable for memory bus buffering, backplane data transfer, and industrial control systems where bidirectional 8-bit data transmission with direction control is required. Its ALS TTL technology makes it a reliable choice for high-speed digital communication in computing and embedded systems.
Specifications
| YTEOL | 0 |
| Additional Feature | WITH DIRECTION CONTROL |
| Control Type | COMMON CONTROL |
| Count Direction | BIDIRECTIONAL |
| Family | ALS |
| JESD-30 Code | R-PDSO-G20 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | BUS TRANSCEIVER |
| Max I(ol) | 0.024A |
| Number of Bits | 8 |
| Number of Functions | 8 |
| Number of Ports | 2 |
| Output Characteristics | 3-STATE |
| Output Polarity | TRUE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP20,.4 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Packing Method | TUBE |
| Peak Reflow Temperature (Cel) | 260 |
| Power Supply Current-Max (ICC) | 58mA |
| Prop. Delay@Nom-Sup | 10ns |
| Propagation Delay (tpd) | 10ns |
| Qualification Status | Not Qualified |
| Schmitt Trigger | NO |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 4.5V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | TTL |
| Temperature Grade | COMMERCIAL |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
| Country of Origin | Malaysia |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for SN74ALS645A-1DW:
Frequently Asked Questions
What is the operating voltage and logic family of the SN74ALS645A-1DW?
The SN74ALS645A-1DW operates at 5V and belongs to the Advanced Low-power Schottky (ALS) TTL logic family, offering a good balance of speed and power consumption for bus transceiver applications.
How many bits does the SN74ALS645A-1DW support and what is its direction control?
The SN74ALS645A-1DW is an 8-bit bus transceiver with bidirectional data flow controlled by a common direction control input, allowing data to be transferred in either direction between two buses.
What package type is the SN74ALS645A-1DW available in?
The SN74ALS645A-1DW comes in a 20-pin SOIC (Small Outline IC) surface-mount package, JESD-30 code R-PDSO-G20, making it suitable for compact PCB designs with standard SMT assembly processes.
What are typical applications for the SN74ALS645A-1DW?
Typical applications include microprocessor data bus buffering, memory interface circuits, backplane communication systems, and industrial control equipment where reliable 8-bit bidirectional data transfer at 5V TTL logic levels is needed.
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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.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $2.5200 | $2.52 |
| 3+ | $1.9740 | $5.92 |
| 10+ | $1.8770 | $18.77 |
| 500+ | $1.4900 | $745.00 |
| 1000+ | $0.4426 | $442.60 |
| 2500+ | $0.4419 | $1104.75 |
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