SN74ALS996DWG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
SN74ALS996DWG4 is an 8-bit transparent D-type latch with 3-state outputs from Texas Instruments in the ALS logic family, featuring read-back and master control in a 24-pin SOIC package. Designed for high-speed bus interface and data buffering applications. From $2.00 in stock, worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 24
- Lifecycle
- OBSOLETE
- Datasheet
- SN74ALS996DWG4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of SN74ALS996DWG4?
- 8-bit transparent D-type latch with 3-state bus driver outputs supporting 50 pF load capacitance for standard TTL bus driving
- Read-back capability with master control for clock and read inputs enabling diagnostic verification of latched data states
- ALS (Advanced Low-power Schottky) logic family delivering faster switching speeds than standard LS TTL with reduced power
- 24-pin SOIC (R-PDSO-G24) RoHS-compliant package for space-efficient high-speed digital bus interface designs
What is SN74ALS996DWG4 used for?
The SN74ALS996DWG4 is used in data bus interface circuits, address latching, and output port expansion in microprocessor and DSP systems requiring 8-bit parallel data buffering with tri-state isolation. Its read-back feature makes it suitable for self-diagnostic digital systems and test equipment where verifying latched output states without external probing is required. The ALS family speed and 3-state outputs also suit memory interface and I/O bus expansion designs in industrial embedded control applications.
What are the specifications of SN74ALS996DWG4?
| Pbfree Code | Yes |
| YTEOL | 0 |
| Additional Feature | WITH READ-BACK; WITH MASTER CONTROL FOR CLOCK AND READ INPUT |
| Control Type | INDEPENDENT CONTROL |
| Count Direction | UNIDIRECTIONAL |
| Family | ALS |
| JESD-30 Code | R-PDSO-G24 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | BUS DRIVER |
| Max I(ol) | 0.024A |
| Number of Bits | 8 |
| Number of Functions | 1 |
| Number of Ports | 2 |
| Output Characteristics | 3-STATE |
| Output Polarity | CONFIGURABLE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP24,.4 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Packing Method | TUBE |
| Peak Reflow Temperature (Cel) | 260 |
| Power Supply Current-Max (ICC) | 85mA |
| Prop. Delay@Nom-Sup | 28ns |
| Propagation Delay (tpd) | 28ns |
| 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 Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| 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 SN74ALS996DWG4 datasheet?
SN74ALS996DWG4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for SN74ALS996DWG4?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does the read-back feature of the SN74ALS996DWG4 simplify fault diagnosis in a digital bus system?
The SN74ALS996DWG4's read-back capability allows the system to read the currently latched 8-bit data state directly through the device without requiring external measurement, supporting self-diagnostic routines at board level. This is particularly useful in 3-state bus architectures where verifying that each of the 8 outputs drives the expected logic level reduces debug time during bring-up.
What load capacitance does the SN74ALS996DWG4 support, and how does the ALS family compare to standard LS TTL in bus driving speed?
The SN74ALS996DWG4 is rated for a load capacitance of 50 pF per output, which is compatible with standard PCB traces in high-speed bus designs. The ALS logic family achieves propagation delays typically below 10 ns, significantly faster than the 15–20 ns typical for standard LS TTL, enabling higher bus clock rates in address latch and data buffer applications.
For an 8-bit microprocessor address bus, how does the 3-state output of the SN74ALS996DWG4 enable multiple devices to share a common bus?
The 3-state outputs of the SN74ALS996DWG4 enter a high-impedance state when disabled via the output enable control, allowing multiple bus driver devices to share the same 8-bit bus without contention. Only one device drives the bus at a time, controlled by the master control inputs, making the SN74ALS996DWG4 suitable for DMA, multi-master, and memory-mapped I/O architectures.
When is SN74ALS996DWG4 a preferable choice over a standard 74HC573 octal latch in an industrial controller design?
The SN74ALS996DWG4's ALS logic family is preferable in 5 V TTL-level systems where propagation delay below 10 ns and direct TTL input compatibility are required, while the 74HC573 is optimized for CMOS voltage levels (2 V to 6 V) and lower quiescent power. Additionally, the SN74ALS996DWG4's built-in read-back and master control features provide functionality not available in the simpler 74HC573, reducing external glue logic in diagnostic-capable designs.
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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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