SN74ALS623ADWRE4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The SN74ALS623ADWRE4 is an octal bidirectional bus transceiver from Texas Instruments in the ALS logic family. It features independent output enable control for each direction and supports 50 pF load capacitance in a 20-pin SOIC package. Available from stock worldwide for reliable data bus interface applications.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 20
- Lifecycle
- OBSOLETE
- Datasheet
- SN74ALS623ADWRE4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Independent output enable for each direction allows full directional control of bidirectional 8-bit data buses
- ALS (Advanced Low-power Schottky) technology delivers high-speed switching with lower power than standard TTL bus transceivers
- 20-pin SOIC (R-PDSO-G20) package with 50 pF load rating supports standard backplane and PCB bus driving
Applications
The SN74ALS623ADWRE4 is designed for bidirectional data bus interfaces in microprocessor systems, memory boards, and industrial control backplanes where independent directional control of 8-bit data is required. Its ALS logic family provides improved speed and lower power consumption compared to standard TTL, making it suitable for legacy and retrofit designs in embedded controllers and programmable logic systems. Independent enable signals for each direction also support multiplexed bus architectures in multi-processor and FPGA-based digital systems.
Specifications
| Pbfree Code | Yes |
| YTEOL | 0 |
| Additional Feature | WITH INDEPENDENT OUTPUT ENABLE FOR EACH DIRECTION |
| Control Type | INDEPENDENT CONTROL |
| Count Direction | BIDIRECTIONAL |
| Family | ALS |
| JESD-30 Code | R-PDSO-G20 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | BUS TRANSCEIVER |
| Max I(ol) | 0.015A |
| Number of Bits | 8 |
| Number of Functions | 1 |
| 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 | TR |
| Peak Reflow Temperature (Cel) | NOT SPECIFIED |
| Power Supply Current-Max (ICC) | 50mA |
| Prop. Delay@Nom-Sup | 13ns |
| Propagation Delay (tpd) | 11ns |
| 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 | TTL |
| Temperature Grade | COMMERCIAL |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for SN74ALS623ADWRE4:
Frequently Asked Questions
What is the SN74ALS623ADWRE4 and what logic family does it belong to?
The SN74ALS623ADWRE4 is an octal bidirectional bus transceiver from Texas Instruments belonging to the ALS (Advanced Low-power Schottky) logic family. It buffers and drives 8 bidirectional data lines with independent output enable control for each direction, commonly used in microprocessor and memory bus interfaces.
What makes the SN74ALS623ADWRE4 different from a standard bus transceiver?
The SN74ALS623ADWRE4 features independent output enable signals for both the A-to-B and B-to-A data directions, giving designers full separate control over each transfer direction. This is particularly useful in complex bus architectures where one direction needs to be enabled while the other is held in a high-impedance state.
What is the rated load capacitance and output current of the SN74ALS623ADWRE4?
The SN74ALS623ADWRE4 is rated for a 50 pF load capacitance and a maximum low-level output current (I_OL) of 15 mA. These specifications make it suitable for driving standard PCB traces and backplane bus lines in industrial and embedded computing environments.
What package does the SN74ALS623ADWRE4 come in?
The SN74ALS623ADWRE4 is housed in a 20-pin Small Outline Integrated Circuit (SOIC) package, identified by JESD-30 code R-PDSO-G20. The SOIC format offers a compact footprint with good solderability for surface-mount PCB assembly in industrial and computing applications.
Is the SN74ALS623ADWRE4 lead-free and RoHS compliant?
Yes, the SN74ALS623ADWRE4 is fully lead-free (Pb-free code: Yes) and RoHS compliant, meeting current environmental regulations for electronics sold in Europe, Asia, and globally. It is compatible with standard lead-free reflow and wave soldering processes used in modern SMT production lines.
Related Guides
How to Choose a Panasonic FT SMD Aluminum Electrolytic Capacitor for 35 V Control Rails
Selection guide for EEEFT1V101AP and related Panasonic FT/FK SMD aluminum electrolytic capacitors on 35 V and lower control rails.
Jul 8, 2026
EEEFK1E470P Design Guide for 24 V Control-Board Hold-Up
Design EEEFK1E470P into 12 V and 24 V control boards with correct voltage derating, ripple checks, layout, and sourcing alternatives.
Jul 8, 2026
EEEFK1E470P Selection Guide for 47 uF SMD Aluminum Electrolytic Capacitors
Selection guidance for EEEFK1E470P and nearby Panasonic FK or FT SMD aluminum electrolytic capacitors for power-rail bulk decoupling.
Jul 7, 2026
EEEFT1V101AP Design Guide for SMD Aluminum Electrolytic Bulk Decoupling
Design guidance for using EEEFT1V101AP as an SMD aluminum electrolytic bulk capacitor in power-rail decoupling and hold-up networks.
Jul 7, 2026
Why Buy from FindMyChip
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.
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“Their engineering team helped us find a pin-compatible alternative when our original MCU went EOL.”