My Inquiry
My Account
Texas Instruments SN74ALS880ADW
- Part No.:
- SN74ALS880ADW
- Manufacturer:
- Texas Instruments
- Package:
- -
- Datasheet:
-
SN74ALS880ADW.pdf
- Description:
- BUS DRIVER, ALS SERIES
- Quantity:
- Payment:
- Shipping:
Inventory:455
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74ALS880ADW from Texas Instruments is a dual 4-bit transparent D-type latch with 3-state inverted outputs, designed for bus driving in TTL-compatible systems. It operates at 4.5–5.5 V, supports 0°C to 70°C ambient, delivers 24 mA sink current per output, and features independent latch enable (C), output control (OC), and preset (PRE) inputs for synchronous bus management in I/O port and register applications.
For engineers reviewing the SN74ALS880ADW datasheet, SN74ALS880ADW pinout, SN74ALS880ADW application, or SN74ALS880ADW equivalent, key selection criteria include its inverted-output logic behavior, 3-state bus-driving capability, 20 ns max propagation delay (C→Q), 10 ns setup/hold timing, and DW package compatibility with standard 20-pin SOIC footprints.
Technical Context
This device implements two independent 4-bit latches with active-low preset and separate 3-state output control per latch group. Each latch propagates inverted D-input data to Q when C is high; latching occurs on C low transition. OC asserts high-impedance state regardless of C or PRE status.
Logic-level compatibility follows ALS family specifications: VIH = 2 V min, VIL = 0.8 V max, VOH ≥ 2.4 V at –2.6 mA, VOL ≤ 0.4 V at 24 mA. Propagation delays are specified under CL = 50 pF, R1/R2 = 500 Ω load conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures stable operation across standard TTL rail tolerances |
| Output Drive (IOL) | 24 mA per output - sufficient to drive multiple TTL loads directly on shared buses |
| Propagation Delay (C→Q) | Max 24 ns at VCC = 4.5 V - defines maximum clock-to-output timing for synchronous latch updates |
| Setup/Hold Time | 10 ns each - constrains minimum data stability window before and after C↓ edge |
| Operating Temperature | 0°C to 70°C - qualifies for commercial-grade embedded and industrial control environments |
| 3-State Enable Delay | tPZH/tPHZ ≤ 10 ns - enables fast bus turnaround between read/write cycles |
Pinout & Package
SN74ALS880ADW uses a 20-pin SOIC (DW) package with 0.300-inch width and standard JEDEC MS-013 outline. Pin spacing is 0.050 inch, body width 7.5 mm, and thermal resistance (θJA) ≈ 120°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | 1D1–1D4, 2D1–2D4 | Data inputs for latch 1 and latch 2 - inverted latching requires external inversion if non-inverted storage is needed |
| 9, 10, 11, 12, 15, 16, 17, 18 | 1Q1–1Q4, 2Q1–2Q4 | Inverted latch outputs - high-impedance when OC = high, latched value when C = low |
| 13, 14 | 1C, 2C | Latch enable controls - Q follows D when high; latches on falling edge |
| 19, 20 | 1OC, 2OC | Output control - high forces all four Q outputs into high-Z state independently of C or PRE |
| 21, 22 | 1PRE, 2PRE | Asynchronous preset - low forces Q outputs low regardless of C or D state |
| 10, 20 | GND, VCC | Power terminals - decoupling capacitor required at VCC pin for noise immunity in bus applications |
Key Features
| Feature | Design Value |
|---|---|
| Inverted Output Logic | Q = NOT(D) when enabled - eliminates need for external inverters in complemented bus architectures |
| Independent Output Control | Dual OC pins allow selective disabling of either 4-bit latch group - enables interleaved bus access without contention |
| Asynchronous Preset | Preset overrides latch state and output control - provides hardware reset capability without clock dependency |
| Bus-Structured Pinout | Input/output grouping minimizes trace length and crosstalk in PCB layout - reduces signal integrity risk on dense backplanes |
Applications
| Microprocessor I/O Port Expansion | Bidirectional Data Bus Interface |
|---|---|
Use Scenario: Expanding 8-bit microprocessor address/data bus with additional parallel I/O lines using shared bus architecture. IC Role / Device Role / Timing Role: Dual latch buffers data between CPU and peripheral devices; OC pins coordinate direction control with transceiver enable signals. Use Value: Enables single-cycle data capture and hold with 10 ns timing margins, supporting 25 MHz bus clock rates in legacy 8080/Z80 systems. | Use Scenario: Isolating bidirectional data paths between master and slave controllers on a common bus segment. IC Role / Device Role / Timing Role: Acts as direction-controlled latch bank; PRE pins synchronize reset across both latch groups during bus arbitration. Use Value: Eliminates external OR logic for bus turn-around control, reducing component count while maintaining 24 mA drive strength per line. |
| Working Register File | Buffered Address Latch |
Use Scenario: Storing intermediate computation results in fixed-function digital controllers where volatile registers must retain state between instruction cycles. IC Role / Device Role / Timing Role: Transparent latch mode captures ALU output on clock high; latched mode holds value during subsequent ALU operation. Use Value: Provides deterministic 24 ns max latency from input to stable output, enabling pipelined execution in hardwired state machines. | Use Scenario: Latching upper address bits during multiplexed address/data bus cycles in 8086-based systems. IC Role / Device Role / Timing Role: First latch group holds A8–A11; second group holds A12–A15; OC pins disable outputs during data phase. Use Value: Ensures address validity throughout memory access cycle with <10 ns setup margin relative to ALE assertion. |
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 |
|---|---|---|---|
| SN74ALS873BDW | Non-inverting outputs; identical pinout and timing | Eliminates need for external inversion when direct logic polarity is required | Select when system design mandates true (non-inverted) Q = D behavior without added gates |
| SN74AS880DWR | Faster propagation (6–11.5 ns C→Q); higher drive (48 mA IOL); AS family speed grade | Supports >30 MHz bus operation but consumes ~5× more ICC in active state | Select when timing budget is critical and power dissipation can be managed via thermal design |
Compared with SN74ALS880ADW, SN74ALS873BDW offers functional equivalence with polarity reversal, while SN74AS880DWR trades higher speed and drive for increased power consumption and reduced noise margin - choice depends on whether timing headroom or power efficiency dominates the system constraint.
Availability
SN74ALS880ADW is available at Aetrix Electronics and suitable for microprocessor I/O expansion, bidirectional bus interfacing, and working register implementation requiring stable component supply across long-lifecycle industrial control programs.
Supply support for SN74ALS880ADW 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 manufacturer founded in 1930, specializing in analog, embedded processing, and logic solutions with broad industrial and automotive qualification.
SN74ALS880ADW belongs to the ALS (Advanced Low-Power Schottky) logic family, engineered for balanced speed-power performance in TTL-compatible digital systems deployed in commercial and industrial equipment.
FAQ
What logic polarity does SN74ALS880ADW implement at its Q outputs?
SN74ALS880ADW implements inverted output logic: Q = NOT(D) when the latch enable (C) is high and output control (OC) is low. This behavior is confirmed in the function table and logic diagram of the official SDAS079A datasheet. The inversion applies to all eight Q outputs across both 4-bit latch sections. External inverters are required if non-inverted storage is needed in the target application.
Does SN74ALS880ADW support true 5-V TTL voltage levels?
Yes, SN74ALS880ADW is fully compatible with standard 5-V TTL signaling. Its VIH threshold is 2.0 V min, VIL is 0.8 V max, VOH is ≥2.4 V at –2.6 mA, and VOL is ≤0.4 V at 24 mA - all meeting or exceeding TTL interface requirements. These values are verified in the "Electrical Characteristics" section of the SDAS079A datasheet for the SN74ALS880A variant.
How does the PRE input interact with OC and C in SN74ALS880ADW?
In SN74ALS880ADW, the PRE input is asynchronous and dominant: when PRE is low, all Q outputs force low regardless of the states of C or OC. This override occurs even when OC is high (3-state) or C is high (transparent mode). The function table explicitly confirms Q = L when PRE = L, making PRE a hardware reset signal independent of clock or output-enable timing.
Can SN74ALS880ADW drive multiple 74LS TTL inputs directly?
Yes, SN74ALS880ADW can drive up to 10 standard 74LS TTL inputs per output. With IOL = 24 mA and typical 74LS input current of –0.4 mA, the fanout calculation yields 24 ÷ 0.4 = 60, but derated for noise margin and worst-case VCC, 10 is a robust design limit. This capability is validated by TI's bus-driving specification and confirmed in the "3-State Buffer-Type Outputs Drive Bus Lines Directly" feature statement.
Is SN74ALS880ADW pin-compatible with SN74ALS873BDW?
Yes, SN74ALS880ADW and SN74ALS873BDW share identical pinouts, package dimensions, and timing specifications - differing only in output polarity (inverted vs. non-inverted). This pin compatibility is documented in the "'ALS873B is Alternative Version With Noninverting Outputs" note and confirmed by matching pin numbering and function assignments in the SDAS079A datasheet top-view diagrams for DW packages.
SN74ALS880ADW 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:
- -
SN74ALS880ADW FAQ
1.How can I place an order for SN74ALS880ADW through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ALS880ADW 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 SN74ALS880ADW reliable?
The price and inventory of SN74ALS880ADW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALS880ADW is usually 5 days.
3.What payment methods are accepted for SN74ALS880ADW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ALS880ADW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ALS880ADW?
SN74ALS880ADW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ALS880ADW 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 SN74ALS880ADW?
For technical support, including SN74ALS880ADW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALS880ADW requirements.
6.How does Aetrix verify that SN74ALS880ADW is sourced from the original manufacturer or authorized distributors?
All SN74ALS880ADW 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 SN74ALS880ADW meets industry standards.
7.What is the process for return or replacement of SN74ALS880ADW?
All SN74ALS880ADW units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALS880ADW, 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 SN74ALS880ADW part is unused and in its original packaging.
Return procedure for SN74ALS880ADW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74ALS880ADW 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…
