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onsemi DM74ALS1005M
- Part No.:
- DM74ALS1005M
- Manufacturer:
- onsemi
- Category:
- Gates and Inverters
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DM74ALS1005M.pdf
- Description:
- IC INVERTER 6CH 1-INP 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,027
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Product details
Overview
DM74ALS1005M from Fairchild Semiconductor is a hex inverting driver IC with six independent open-collector outputs, designed for level translation and wired-OR logic interfacing in TTL systems. It operates at VCC = 4.5–5.5 V, delivers IOL = 24 mA per output, supports tPLH/tPHL ≤ 30/10 ns (CL = 50 pF), and is rated for 0°C to +70°C industrial temperature range.
For engineers reviewing the DM74ALS1005M datasheet, pinout, applications, or equivalent options, key selection criteria include open-collector drive strength, propagation delay under 50 pF load, guaranteed AC performance across full VCC and temperature range, and compatibility with legacy Schottky TTL bus interfaces.
Technical Context
The DM74ALS1005M implements six identical inverting buffer stages, each with an open-collector NPN output requiring external pull-up resistors. Its logic function is strictly Y = A̅, with no internal termination or biasing - all high-level output states depend entirely on external circuitry.
It uses an advanced oxide-isolated, ion-implanted Schottky TTL process, enabling improved AC performance over standard LS and ALS families. Switching characteristics are fully specified at CL = 50 pF and guaranteed across VCC = 4.5–5.5 V and TA = 0–70°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - ensures stable operation with standard TTL power rails and tolerance for supply ripple |
| IOL (per output) | 24 mA - supports direct driving of multiple TTL inputs or low-impedance loads without buffering |
| tPLH / tPHL | ≤30 ns / ≤10 ns at CL = 50 pF - enables reliable use in 30 MHz+ clock distribution or address strobe paths |
| VIL / VIH | 0.8 V / 2.0 V - compatible with standard TTL input thresholds for seamless integration into existing 5 V logic systems |
| Operating Temp | 0°C to +70°C - qualified for commercial and industrial ambient environments without derating |
| Output Type | Open-collector - allows wired-AND/wired-OR bus configurations and level translation to higher voltages |
Pinout & Package
DM74ALS1005M is housed in a 14-lead SOIC package (JEDEC MS-012, 0.150" narrow body, Package Number M14A), with θJA = 106.5°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 5, 9, 11, 13 | Input (A1–A6) | Independent TTL-compatible digital inputs; each drives one inverter stage |
| 2, 4, 6, 10, 12, 14 | Output (Y1–Y6) | Open-collector NPN outputs; require external pull-up for HIGH state; sink up to 24 mA |
| 7 | GND | Ground reference for all inputs, outputs, and internal circuitry |
| 14 | VCC | Positive supply terminal (4.5–5.5 V); powers all six driver stages |
Key Features
| Feature | Design Value |
|---|---|
| Open-collector outputs | Enables wired-OR bus arbitration and interface to mixed-voltage systems (e.g., 5 V logic driving 12 V peripheral enable lines) |
| Guaranteed AC specs at 50 pF | Ensures predictable timing in real-world PCB traces and fanout scenarios without margin loss |
| Pin-for-pin compatibility | Direct replacement for DM74ALS05A and standard Schottky TTL hex inverters (e.g., 74S05) without layout change |
| Oxide-isolated Schottky process | Reduces leakage and improves noise immunity vs. bipolar-only TTL, especially at elevated temperatures |
Applications
| Bus Interface Logic | LED Driver Interface |
|---|---|
Use Scenario: Driving shared data/address buses with multiple receivers using wired-AND configuration. IC Role / Device Role / Timing Role: Hex inverting driver providing level-shifted, current-sinking bus drivers with controlled rise/fall times. Use Value: Enables robust multi-drop TTL bus signaling with single-device fanout control and noise-resistant open-collector arbitration. | Use Scenario: Directly sinking current for up to six discrete LEDs in panel indicator or status display circuits. IC Role / Device Role / Timing Role: Inverting current sink driver converting logic-high control signals into LED-on states. Use Value: Eliminates need for discrete transistors; supports 24 mA per LED at full brightness with verified VOL ≤ 0.5 V. |
| Relay/Driver Control | Legacy System Glue Logic |
Use Scenario: Controlling low-side relay coils or small solenoids via microcontroller GPIO outputs. IC Role / Device Role / Timing Role: Inverting interface buffer translating 5 V logic levels into switched ground paths for inductive loads. Use Value: Provides 24 mA sink capability sufficient for most 5 V/12 V relay coils; open-collector output isolates MCU from back-EMF. | Use Scenario: Replacing obsolete 74S05 or 74LS05 in aging industrial control backplanes. IC Role / Device Role / Timing Role: Pin-compatible hex inverter restoring signal integrity and timing margins in legacy TTL subsystems. Use Value: Maintains original PCB layout while improving propagation delay consistency and temperature stability over vintage parts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar hex inverting driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ALS05N | Same ALS family, identical pinout and DC specs; tPLH/tPHL slightly slower (max 35/12 ns at 50 pF) | Valid for cost-sensitive designs where <5 ns timing margin is acceptable | Select when legacy stock availability or dual-sourcing is required without layout change |
| 74HC05PW | CMOS-based, rail-to-rail VOH/VOL, but non-inverting inputs and push-pull outputs - requires redesign for open-collector use | Only suitable where wired-OR is not needed and supply voltage may vary (2–6 V) | Choose only if system redesign permits removal of external pull-ups and accepts non-inverting logic polarity |
Compared with SN74ALS05N and 74HC05PW, the DM74ALS1005M uniquely combines guaranteed 30 ns max tPLH, true open-collector outputs, and pin compatibility with legacy Schottky TTL - making it irreplaceable in bus arbitration and legacy upgrade scenarios without hardware modification.
Availability
DM74ALS1005M is available at Aetrix Electronics and suitable for industrial control backplanes, legacy system upgrades, and discrete LED/relay interface circuits requiring stable component supply and long-term obsolescence management.
Supply support for DM74ALS1005M 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
Fairchild Semiconductor was a leading US-based analog and discrete semiconductor manufacturer, acquired by ON Semiconductor in 2016; its legacy logic portfolio remains widely deployed in industrial and telecom infrastructure.
The DM74ALS1005M belongs to Fairchild's advanced low-power Schottky (ALS) TTL logic family, engineered specifically for high-speed, low-power replacements of standard TTL in space-constrained and thermally demanding board-level applications.
FAQ
What is the maximum sink current per output of the DM74ALS1005M?
The DM74ALS1005M guarantees a minimum LOW-level output current (IOL) of 24 mA per channel under VCC = 4.5 V and VOL ≤ 0.5 V conditions. This rating is validated across the full operating temperature range (0°C to +70°C) and supports direct driving of TTL inputs, LEDs, or small relays without external amplification. The DM74ALS1005M maintains this drive strength even with simultaneous switching of multiple outputs.
Does the DM74ALS1005M require external pull-up resistors?
Yes, the DM74ALS1005M has open-collector outputs and absolutely requires external pull-up resistors for HIGH-level logic operation. Without them, outputs remain floating in the HIGH state. Pull-up values must be selected based on total IOH, IIH, and IIL of connected loads - typical values range from 1.0 kΩ to 10 kΩ depending on speed and fanout requirements. The DM74ALS1005M datasheet provides explicit equations for calculating optimal resistor values.
Is the DM74ALS1005M pin-compatible with the 74LS05?
Yes, the DM74ALS1005M is pin-for-pin compatible with the 74LS05 and 74S05 hex inverters, sharing identical 14-pin SOIC (M14A) and PDIP (N14A) footprints and input/output assignments. However, the DM74ALS1005M offers faster propagation delays (≤30 ns vs. ≤35 ns) and lower power consumption than LS variants. This makes the DM74ALS1005M a drop-in performance upgrade in existing 74LS05 layouts.
What is the recommended operating voltage range for the DM74ALS1005M?
The DM74ALS1005M is specified for reliable operation at VCC = 4.5 V to 5.5 V, with all electrical characteristics guaranteed across this range and over the full 0°C to +70°C temperature span. Operation below 4.5 V may cause marginal VIH/VIL margins or increased propagation delay; above 5.5 V violates recommended conditions and risks reliability degradation. The DM74ALS1005M absolute maximum VCC is 7 V, but sustained operation above 5.5 V is not advised.
Can the DM74ALS1005M be used in wired-OR configurations?
Yes, the DM74ALS1005M is explicitly designed for wired-OR applications due to its open-collector outputs. Multiple outputs can be tied together with a single pull-up resistor to implement active-low OR logic (e.g., interrupt request aggregation). The DM74ALS1005M's guaranteed IOL = 24 mA per output ensures robust bus contention handling, and its Schottky-clamped inputs prevent latch-up during bus conflicts.
DM74ALS1005M Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74ALS
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Logic Type:
- Inverter
- Number of Circuits:
- 6
- Number of Inputs:
- 1
- Features:
- Open Collector
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Max):
- -
- Current - Output High, Low:
- -, 24mA
- Input Logic Level - Low:
- 0.8V
- Input Logic Level - High:
- 2V
- Max Propagation Delay @ V, Max CL:
- 30ns @ 5V, 50pF
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
DM74ALS1005M FAQ
1.How can I place an order for DM74ALS1005M through Aetrix?
Please submit a Request for Quotation (RFQ) for DM74ALS1005M 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 DM74ALS1005M reliable?
The price and inventory of DM74ALS1005M are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DM74ALS1005M is usually 5 days.
3.What payment methods are accepted for DM74ALS1005M?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DM74ALS1005M transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DM74ALS1005M?
DM74ALS1005M orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DM74ALS1005M 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 DM74ALS1005M?
For technical support, including DM74ALS1005M datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DM74ALS1005M requirements.
6.How does Aetrix verify that DM74ALS1005M is sourced from the original manufacturer or authorized distributors?
All DM74ALS1005M 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 DM74ALS1005M meets industry standards.
7.What is the process for return or replacement of DM74ALS1005M?
All DM74ALS1005M units undergo pre-shipment inspection (PSI). If there is an issue with DM74ALS1005M, 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 DM74ALS1005M part is unused and in its original packaging.
Return procedure for DM74ALS1005M:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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