My Inquiry
My Account
Texas Instruments SN74ALS880ADWR
- Part No.:
- SN74ALS880ADWR
- Manufacturer:
- Texas Instruments
- Package:
- -
- Datasheet:
-
SN74ALS880ADWR.pdf
- Description:
- BUS DRIVER, ALS SERIES
- Quantity:
- Payment:
- Shipping:
Inventory:1,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74ALS880ADWR from Texas Instruments is a dual 4-bit transparent D-type latch with 3-state outputs, designed for bus driving in TTL-compatible systems. It features inverted output logic, independent latch enable (C) and output control (OC) inputs per section, and operates from 4.5 V to 5.5 V at 0°C to 70°C. Used in I/O port buffering and bidirectional bus interfacing.
For engineers reviewing the SN74ALS880ADWR datasheet, SN74ALS880ADWR pinout, SN74ALS880ADWR application, or SN74ALS880ADWR equivalent, key selection criteria include 3-state drive capability (24 mA sink), inverted output polarity, bus-structured 24-pin SOIC package, and ALS family propagation delay (≤24 ns).
Technical Context
This device implements two independent 4-bit latches with separate clock (C) and output control (OC) signals per section. Each latch operates in transparent mode when C is high (Q follows inverted D), latches on C falling edge, and enters high-impedance state when OC is high.
It uses bipolar ALS (Advanced Low-Power Schottky) technology, delivering lower power than standard TTL while maintaining compatible voltage thresholds (VIH = 2 V, VIL = 0.8 V) and higher noise immunity. PRE input forces Q low asynchronously, independent of C or OC status.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | ALS (Advanced Low-Power Schottky) - enables TTL-compatible operation with reduced power vs. standard TTL |
| Supply Voltage | 4.5 V to 5.5 V - supports standard 5 V rail with ±10% tolerance |
| Output Drive | 24 mA sink / –2.6 mA source - sufficient to directly drive standard TTL loads and 50 pF buses |
| Propagation Delay | tPLH/tPHL ≤ 24 ns (C→Q) - ensures timing compatibility in 20–25 MHz bus systems |
| Operating Temperature | 0°C to 70°C - commercial-grade rating suitable for industrial and computing environments |
| 3-State Enable Time | tPZH/tPLZ ≤ 18 ns - fast output disable/enable critical for time-multiplexed bus arbitration |
| Input Thresholds | VIH = 2.0 V, VIL = 0.8 V - matches TTL logic levels for seamless interface with legacy systems |
Pinout & Package
SN74ALS880ADWR is supplied in a 24-pin SOIC (DW) package with 300-mil width and gull-wing leads. Pin spacing is 0.050 inch (1.27 mm), body width 0.300 inch (7.62 mm), and total length 0.600 inch (15.24 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | Section 1 data inputs (1D1–1D4), latch enable (1C), preset (1PRE), output control (1OC) | Inputs for first 4-bit latch group; 1C controls transparency/latch, 1OC enables/disables outputs |
| 9, 10, 11, 12, 13, 14, 15, 16 | Section 2 data inputs (2D1–2D4), latch enable (2C), preset (2PRE), output control (2OC) | Inputs for second 4-bit latch group; identical function and timing to Section 1 |
| 17–20, 21–24 | Section 1 and Section 2 inverted outputs (1Q1–1Q4, 2Q1–2Q4) | Active-low, 3-state outputs - high-impedance when corresponding OC is high |
| 12, 24 | VCC and GND | Power supply pins - decoupling capacitor placement near these pins required for noise suppression |
Key Features
| Feature | Design Value |
|---|---|
| Inverted Output Logic | Q outputs are inverted relative to D inputs - simplifies design where negative logic is required without external inverters |
| Independent Output Control | Dedicated OC pin per section allows selective bus isolation without affecting latch state - essential for multi-master bus arbitration |
| Asynchronous Preset | PRE input forces Q low regardless of C or OC state - enables hardware reset of latch contents without clock dependency |
| Bus-Structured Pinout | Input/output grouping minimizes trace crossing on PCB - reduces layout complexity and signal crosstalk in dense bus designs |
| ALS Technology | Combines Schottky clamping with low-power design - achieves 20 mW typical power per latch at 5 V, versus 40+ mW for standard TTL |
Applications
| Microprocessor I/O Port Expansion | Parallel Bus Isolation |
|---|---|
Use Scenario: Expanding GPIO capability of an 8-bit microcontroller by adding two 4-bit bidirectional data ports. IC Role / Device Role / Timing Role: Acts as buffered, latch-controlled I/O register - holds data stable during CPU read/write cycles and isolates peripheral timing from bus activity. Use Value: Enables reliable handshaking with slow peripherals using PRE and OC for synchronous reset and bus release, reducing software overhead. | Use Scenario: Isolating two subsystems sharing a common 8-bit data bus, such as a CPU and DMA controller. IC Role / Device Role / Timing Role: Functions as a directionally controlled bus transceiver - one section drives bus while other is tri-stated, preventing contention. Use Value: Eliminates need for discrete bus buffers; 24 mA drive strength ensures signal integrity across 10+ TTL loads at ≤20 MHz. |
| Legacy System Data Latching | Industrial Control Register Bank |
Use Scenario: Capturing sensor data from parallel-output ADCs in older instrumentation systems using TTL-level interfaces. IC Role / Device Role / Timing Role: Serves as a transparent latch - samples analog-to-digital conversion results on C high, holds value stable during digital processing. Use Value: Inverted outputs match legacy decoder logic; tsu/th = 10 ns meets timing margins of 8085/8088-based controllers. | Use Scenario: Storing configuration bits for PLC I/O modules where registers must retain state during hot-swap events. IC Role / Device Role / Timing Role: Provides nonvolatile-holding register bank - PRE resets all outputs to known low state on power-up or fault condition. Use Value: Asynchronous PRE ensures deterministic initialization without requiring clock sequencing, improving system reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual 4-bit latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ALS873BDWR | Non-inverting outputs; otherwise identical pinout, timing, and drive specs | Used where positive-logic data path is required without external inversion | Select SN74ALS873BDWR if system logic requires true (non-inverted) Q outputs; no PCB change needed |
| SN74AS880DWR | Faster propagation (≤11.5 ns C→Q), higher drive (48 mA sink), but increased ICC (118 mA max) | Suitable for high-speed bus backplanes requiring tighter timing margins | Choose SN74AS880DWR only when speed >25 MHz or load >20 TTL units is required; verify thermal dissipation |
Compared with SN74ALS880ADWR, SN74ALS873BDWR provides functional equivalence with output polarity reversal, while SN74AS880DWR trades higher power for significantly improved speed - making the ALS version optimal for cost-sensitive, thermally constrained commercial systems requiring proven reliability and moderate performance.
Availability
SN74ALS880ADWR is available at Aetrix Electronics and suitable for microprocessor I/O expansion, parallel bus isolation, and legacy system data latching requiring stable component supply, long-term obsolescence management, and full traceability.
Supply support for SN74ALS880ADWR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a U.S.-based semiconductor company founded in 1930, specializing in analog, embedded processing, and logic solutions with broad industrial and automotive reach.
The SN74ALS880ADWR belongs to TI's legacy ALS logic family, engineered for backward compatibility with TTL systems while delivering improved speed-power trade-offs for mid-1980s computing and industrial control platforms.
FAQ
What logic family does SN74ALS880ADWR belong to, and how does it differ from standard TTL?
SN74ALS880ADWR belongs to the Advanced Low-Power Schottky (ALS) logic family. It differs from standard TTL by integrating Schottky diodes to prevent transistor saturation, reducing propagation delay (≤24 ns vs. ~35 ns for 74LS) and power consumption (~20 mW per latch vs. ~30 mW for 74LS). Input thresholds (VIH = 2.0 V, VIL = 0.8 V) remain fully TTL-compatible, ensuring drop-in replacement in most legacy designs without logic level translation.
Does SN74ALS880ADWR support true bidirectional bus operation?
SN74ALS880ADWR does not provide automatic bidirectional control like transceivers; however, its dual independent 3-state sections enable manual bidirectional bus use. One section drives data onto the bus while the other is tri-stated via its OC input, and vice versa - requiring external control logic to coordinate direction. This architecture avoids bus contention and is widely used in CPU-to-peripheral interfaces where direction is determined by control signals such as RD/WR.
What is the function of the PRE pin on SN74ALS880ADWR, and how is it typically used?
The PRE (Preset) pin on SN74ALS880ADWR asynchronously forces all Q outputs low, independent of latch enable (C) or output control (OC) states. It is typically used for hardware-initiated reset of latch contents during power-up, fault recovery, or system initialization. Because PRE overrides normal latch behavior, it ensures deterministic output states before clock or data signals stabilize - critical in safety-critical or synchronized startup sequences.
Can SN74ALS880ADWR be operated at 3.3 V?
No, SN74ALS880ADWR is not rated for 3.3 V operation. Its absolute maximum supply voltage is 7 V, but recommended operating range is strictly 4.5 V to 5.5 V. At 3.3 V, input thresholds (VIH = 2.0 V) would exceed 60% of VCC, causing unreliable logic recognition, and output drive capability collapses below specification. For 3.3 V systems, consider modern alternatives like SN74LVC880A or level-shifting interfaces.
Is SN74ALS880ADWR pin-compatible with SN74AS880DWR?
Yes, SN74ALS880ADWR and SN74AS880DWR share identical 24-pin SOIC (DW) packaging, pinout, and terminal functions - including matching assignments for D, C, OC, PRE, Q, VCC, and GND. However, they differ electrically: AS offers faster timing (≤11.5 ns vs. ≤24 ns) and higher drive (48 mA vs. 24 mA), but draws more current (118 mA vs. 31 mA). Substitution is possible in space-constrained layouts, but thermal and timing validation is required.
SN74ALS880ADWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- -
- Number of Elements:
- -
- Number of Bits per Element:
- -
- Input Type:
- -
- Output Type:
- -
- Current - Output High, Low:
- -
- Voltage - Supply:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
SN74ALS880ADWR FAQ
1.How can I place an order for SN74ALS880ADWR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ALS880ADWR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SN74ALS880ADWR reliable?
The price and inventory of SN74ALS880ADWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALS880ADWR is usually 5 days.
3.What payment methods are accepted for SN74ALS880ADWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ALS880ADWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ALS880ADWR?
SN74ALS880ADWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ALS880ADWR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SN74ALS880ADWR?
For technical support, including SN74ALS880ADWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALS880ADWR requirements.
6.How does Aetrix verify that SN74ALS880ADWR is sourced from the original manufacturer or authorized distributors?
All SN74ALS880ADWR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SN74ALS880ADWR meets industry standards.
7.What is the process for return or replacement of SN74ALS880ADWR?
All SN74ALS880ADWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALS880ADWR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SN74ALS880ADWR part is unused and in its original packaging.
Return procedure for SN74ALS880ADWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74ALS880ADWR Tags
-
SN74LVC1G17DBVR
Texas Instruments
-
SN74LVC1G07DCKR
Texas Instruments
-
SN74LVC1G17DCKR
Texas Instruments
-
SN74LVC1G07DBVR
Texas Instruments
-
SN74LVC1G125DCKR
Texas Instruments
-
SN74AHCT1G126DBVR
Texas Instruments
-
SN74LVC1G125DBVR
Texas Instruments
-
SN74AHCT1G125DBVR
Texas Instruments
-
SN74LVC2G17DBVR
Texas Instruments
-
SN74LVC2G07DCKR
Texas Instruments
-
SN74LVC1G34DCKR
Texas Instruments
-
SN74LVC2G17DCKR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
