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Texas Instruments SN100KT5541DW
- Part No.:
- SN100KT5541DW
- Manufacturer:
- Texas Instruments
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
SN100KT5541DW.pdf
- Description:
- ECL TO TTL TRANSLATOR, 8 FUNC
- Quantity:
- Payment:
- Shipping:
Inventory:2,342
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Product details
Overview
SN100KT5541DW from Texas Instruments is an octal ECL-to-TTL level translator IC designed for CPU/bus-oriented signal translation in mixed-logic systems. It features noninverting outputs, dual output-enable inputs (OE1 ECL-compatible, OE2 TTL-compatible), flow-through pin architecture, and operates across 0°C to 85°C with VCC = 4.5–5.5 V and VEE = −4.2 to −4.8 V. It is used in memory-address drivers, clock distribution, and bus receivers/transmitters interfacing 100K ECL logic to TTL subsystems.
For engineers reviewing the SN100KT5541DW datasheet, SN100KT5541DW pinout, SN100KT5541DW application, or SN100KT5541DW equivalent, key selection criteria include ECL/TTL bidirectional enable control, guaranteed 48 mA low-level output drive, sub-7 ns propagation delay (tPLH/tPHL), thermal derating for SOIC-24 packages, and compatibility with legacy 100K ECL timing margins.
Technical Context
This device implements a dual-rail translation architecture with separate VCC (TTL-side) and VEE (ECL-side) supplies. Inputs accept both ECL-level signals (−1810 mV to −840 mV) and TTL-level signals (0.8 V to 2 V), while outputs drive standard TTL loads with VOH ≥ 2.4 V (IOH = −3 mA) and VOL ≤ 0.55 V (IOL = 48 mA).
The ANDed enable logic (OE1 ∧ OE2) ensures simultaneous control from either logic family, and the flow-through pinout minimizes trace stubs and crosstalk in high-speed PCB layouts. Center-pin VCC/VEE/GND placement reduces switching noise coupling between supply domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Supply Range | 4.5 V to 5.5 V - Ensures compatibility with standard TTL 5 V rails and margin for line regulation. |
| VEE Supply Range | −4.2 V to −4.8 V - Matches 100K ECL nominal −4.5 V bias and accommodates process variation. |
| tPLH / tPHL | 1.7 ns (min) to 6.2 ns (max) - Supports >150 MHz data rates in point-to-point bus applications. |
| IOL (Low-Level Output) | 48 mA - Drives multiple 74LS TTL inputs (fan-out ≥ 20) without external buffers. |
| VIH/VIL (TTL Inputs) | 2.0 V / 0.8 V - Fully compliant with TTL input thresholds per JEDEC JESD-8A. |
| VIH/VIL (ECL Inputs) | −840 mV / −1810 mV - Matches 100K ECL output swing and noise margin requirements. |
| Operating Temperature | 0°C to 85°C - Qualified for commercial-grade industrial control and computing environments. |
Pinout & Package
SN100KT5541DW is housed in a 24-pin SOIC (Small Outline Integrated Circuit) package (DW suffix), with gull-wing leads, 300-mil body width, and standard JEDEC MS-013AC footprint. Thermal resistance θJA is 60°C/W at 0 ft/min airflow (derates with forced convection).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 9, 10, 11, 12 | A1–A8 (Data Inputs) | ECL- or TTL-compatible inputs accepting −1810 mV to 7 V; internally terminated for ECL mode. |
| 13–20 | Y1–Y8 (Outputs) | Noninverting TTL outputs capable of sourcing −15 mA or sinking 48 mA into standard loads. |
| 5 | VCC | TTL-side supply rail (4.5–5.5 V); center-pin placement reduces power-plane inductance. |
| 6, 7, 8 | GND | Three dedicated ground pins minimize return-path impedance and suppress ground bounce. |
| 17 | VEE | ECL-side supply rail (−4.2 to −4.8 V); isolated from VCC to prevent rail coupling. |
| 14, 15 | OE1 (ECL), OE2 (TTL) | AND-gated output enables: OE1 accepts ECL levels; OE2 accepts TTL levels-no level-shifting needed. |
| 21–24 | Y5–Y8 (continued) | Continuation of output bank; flow-through layout aligns inputs left-to-right and outputs right-to-left. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-rail supply interface | Independent VCC (TTL) and VEE (ECL) rails eliminate need for external level shifters or regulators. |
| Flow-through pin architecture | Input-to-output signal path spans opposite sides of package-reduces layer transitions and stub length in PCB routing. |
| Center-pin power/ground configuration | VCC, GND×3, and VEE placed centrally to lower loop inductance and suppress simultaneous switching noise. |
| ANDed dual-enable control | OE1 (ECL) and OE2 (TTL) must both be asserted to enable outputs-enables seamless integration into mixed-logic control buses. |
| Guaranteed 48 mA sink capability | Drives full TTL fan-out without external pull-downs or buffer stages, reducing BOM count and board area. |
Applications
| Memory Address Drivers | Clock Distribution Networks |
|---|---|
Use Scenario: Driving address lines from an ECL-based CPU to TTL-compatible memory arrays in legacy minicomputer systems. IC Role / Device Role / Timing Role: Level translator enabling timing-critical address propagation with sub-7 ns delay and deterministic setup/hold margins. Use Value: Eliminates discrete resistor-transistor level shifters, reduces propagation skew across 8-bit address bus, and maintains 100K ECL timing integrity into TTL memory decoders. |
Use Scenario: Distributing a master system clock from an ECL oscillator to multiple TTL clocked peripherals (e.g., UARTs, timers, FIFOs). IC Role / Device Role / Timing Role: Noninverting clock buffer with matched delay paths and low-output-impedance drive for fan-out scaling. Use Value: Provides 48 mA sink current per output to drive long traces or multiple loads while preserving edge rate and minimizing jitter accumulation. |
| Bus Receivers | Bus Transmitters |
Use Scenario: Receiving data from ECL bus transceivers and presenting clean TTL-level signals to microcontroller data ports. IC Role / Device Role / Timing Role: Input translator with ECL-compatible VIH/VIL thresholds and TTL-compatible output voltage levels. Use Value: Enables direct connection to 100K ECL bus without termination resistors or AC-coupling, maintaining DC-coupled signal integrity and noise immunity. |
Use Scenario: Transmitting TTL-generated control/status signals onto an ECL backplane in hybrid instrumentation systems. IC Role / Device Role / Timing Role: Bidirectional enable-controlled driver translating TTL logic states into ECL-compatible voltage swings. Use Value: Dual OE inputs allow synchronous gating from either logic domain, supporting time-multiplexed bus arbitration without added glue logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ECL-to-TTL translation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN100KT5541NT | Same electrical specs and logic function; packaged in 24-pin PDIP (NT) instead of SOIC (DW). | PDIP variant suits through-hole prototyping or legacy wave-soldered systems; higher θJA (75°C/W) limits high-density use. | Select NT for hand-soldering, test fixtures, or replacement in existing DIP-based designs. |
| SN100KHT5541DW | Higher-speed variant: tPLH/tPHL max = 5.5 ns (vs. 6.2 ns); optimized for 100KHT ECL family with tighter VEE tolerance (−5.46 V max). | Targeted at newer 100KHT systems requiring improved timing margin; not backward-compatible with −4.8 V VEE ceiling of SN100KT5541DW. | Choose HT version only when system uses 100KHT sources and requires <5.5 ns delay; verify VEE compliance. |
Compared with SN100KT5541NT, the SN100KT5541DW offers superior thermal performance and board-space efficiency in surface-mount systems; compared with SN100KHT5541DW, it provides broader VEE tolerance and proven compatibility with legacy 100K ECL buses at slightly relaxed timing.
Availability
SN100KT5541DW is available at Aetrix Electronics and suitable for memory-address drivers, clock distribution networks, bus receivers, and bus transmitters requiring stable component supply in industrial computing and instrumentation retrofits.
Supply support for SN100KT5541DW 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 global semiconductor leader founded in 1930, specializing in analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.
The SN100KT5541DW belongs to TI's legacy 100K ECL translator product line, engineered specifically to bridge high-speed ECL logic domains with mainstream TTL subsystems in CPU, memory, and bus interface applications.
FAQ
What logic families does the SN100KT5541DW support on its inputs and outputs?
The SN100KT5541DW accepts both 100K ECL-level inputs (−1810 mV to −840 mV) and standard TTL-level inputs (0.8 V to 2.0 V) on all eight data pins and the two enable inputs. Its outputs deliver true TTL-compatible voltage levels: VOH ≥ 2.4 V (at −3 mA) and VOL ≤ 0.55 V (at 48 mA), ensuring interoperability with 74LS, 74F, and other TTL families without external conditioning. This dual-input capability is intrinsic to the SN100KT5541DW design and documented in its recommended operating conditions table.
Does the SN100KT5541DW require external pull-up or pull-down resistors?
No, the SN100KT5541DW does not require external pull-up or pull-down resistors for normal operation. Its inputs are internally biased to accept ECL and TTL logic levels directly, and its outputs have active push-pull drive capability-capable of sourcing up to −15 mA and sinking up to 48 mA. The SN100KT5541DW datasheet specifies no external termination for standard loading; only proper VCC and VEE decoupling (0.1 µF ceramic near each supply pin) is required per TI application guidance.
What is the maximum output drive capability of the SN100KT5541DW?
The SN100KT5541DW guarantees a minimum low-level output current (IOL) of 48 mA per channel under recommended operating conditions (VCC = 4.5 V, VEE = −4.5 V, TA = 25°C). This allows direct driving of up to 20 standard 74LS TTL inputs or equivalent capacitive loads without buffering. High-level output current (IOH) is specified at −15 mA. These values are measured per channel and confirmed in the electrical characteristics table of the SN100KT5541DW datasheet (SDZS004A).
Can the SN100KT5541DW operate with a single 5 V supply?
No, the SN100KT5541DW requires two independent supplies: a positive TTL-side VCC (4.5–5.5 V) and a negative ECL-side VEE (−4.2 to −4.8 V). It cannot operate on a single 5 V rail. The dual-supply architecture is fundamental to its ECL-to-TTL translation function-the internal circuitry references both rails to correctly interpret ECL differential thresholds and generate TTL-compatible output swings. Attempting single-supply operation will result in undefined behavior or device damage, as stated in the absolute maximum ratings of the SN100KT5541DW datasheet.
Is the SN100KT5541DW still in production, and what is its lifecycle status?
The SN100KT5541DW is marked "OBSOLETE" by Texas Instruments per its official packaging information addendum. TI discontinued production, and no new manufacturing lots are planned. However, Aetrix Electronics maintains verified, traceable inventory of original TI-manufactured SN100KT5541DW devices for legacy system support, repair, and industrial retrofit programs. Full traceability documentation and extended lifecycle coordination are available upon request for the SN100KT5541DW.
SN100KT5541DW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- *
- Package/Case:
- Packaging:
- Bulk
- Product Status:
- Active
- Translator Type:
- -
- Channel Type:
- -
- Number of Circuits:
- -
- Channels per Circuit:
- -
- Voltage - VCCA:
- -
- Voltage - VCCB:
- -
- Input Signal:
- -
- Output Signal:
- -
- Output Type:
- -
- Data Rate:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Features:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
SN100KT5541DW FAQ
1.How can I place an order for SN100KT5541DW through Aetrix?
Please submit a Request for Quotation (RFQ) for SN100KT5541DW 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 SN100KT5541DW reliable?
The price and inventory of SN100KT5541DW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN100KT5541DW is usually 5 days.
3.What payment methods are accepted for SN100KT5541DW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN100KT5541DW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN100KT5541DW?
SN100KT5541DW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN100KT5541DW 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 SN100KT5541DW?
For technical support, including SN100KT5541DW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN100KT5541DW requirements.
6.How does Aetrix verify that SN100KT5541DW is sourced from the original manufacturer or authorized distributors?
All SN100KT5541DW 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 SN100KT5541DW meets industry standards.
7.What is the process for return or replacement of SN100KT5541DW?
All SN100KT5541DW units undergo pre-shipment inspection (PSI). If there is an issue with SN100KT5541DW, 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 SN100KT5541DW part is unused and in its original packaging.
Return procedure for SN100KT5541DW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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