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Home > Products > Integrated Circuits (ICs) > Logic > Translators, Level Shifters

Texas Instruments SN10KHT5542NTG4

Name: SN10KHT5542NTG4
Brand: Texas Instruments
SKU: SN10KHT5542NTG4
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN10KHT5542NTG4

Manufacturer:: Texas Instruments

Category:: Translators, Level Shifters

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Datasheet:: SN10KHT5542NTG4.pdf

Description:: IC TRANSLTR BIDIRECTIONAL 24DIP

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Product details

Overview

SN10KHT5542NTG4 from Texas Instruments is an octal TTL-to-ECL translator with output enable, designed for high-speed level translation between TTL logic families and ECL systems. It features 8-channel unidirectional translation, 3.3 ns typical propagation delay (t_PLH/t_PHL), ±20 mA ECL output drive capability, and operates over 0°C to 70°C ambient temperature - deployed in legacy mainframe backplanes and high-speed data acquisition timing interfaces.

For engineers reviewing the SN10KHT5542NTG4 datasheet, SN10KHT5542NTG4 pinout, SN10KHT5542NTG4 application, or SN10KHT5542NTG4 equivalent, key selection considerations include ECL-compatible output swing (−1.45 V to −0.95 V), TTL input threshold compatibility (V_IL = 0.8 V max, V_IH = 2.0 V min), output enable timing control, and SOIC-24 package thermal and routing constraints.

Technical Context

This device implements TTL-input logic gates driving differential ECL-compatible emitter-follower outputs with active-low output enable (OE̅). Each channel provides true and complementary ECL outputs (Y and Y̅) referenced to V_EE = −5.2 V and terminated to V_TT = −2.0 V.

It requires dual supplies: V_CC = +5 V for TTL input stage biasing and V_EE = −5.2 V for ECL output stage operation. Input hysteresis is absent; DC noise margin relies on standard TTL voltage thresholds and ECL termination stability.

Key Specifications

Parameter	Value and Actual Design Meaning
Logic Conversion	TTL input → ECL output (true/complement); no bidirectional or ECL-to-TTL translation
Propagation Delay	3.3 ns typical (t_PLH/t_PHL, V_CC = 5 V, V_EE = −5.2 V, R_L = 50 Ω to V_TT)
Output Drive	±20 mA per channel into 50 Ω load; supports fan-out to multiple ECL gates with proper termination
Supply Voltages	V_CC = +5 V (TTL input stage), V_EE = −5.2 V (ECL output stage), V_TT = −2.0 V (termination reference)
Operating Temperature	0°C to +70°C ambient; not rated for extended industrial (−40°C to +85°C) or military ranges
Output Enable	Active-low OE̅ controls all eight outputs simultaneously; high-Z state when disabled

Pinout & Package

SN10KHT5542NTG4 is supplied in a 24-pin SOIC (DW) package with standard JEDEC MS-013AC outline, 0.300-inch body width, and 1.27 mm pitch. Pin 1 is marked by beveled corner or notch orientation.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 3, 4, 5, 6, 7, 8	TTL Inputs (A1–A8)	Active-HIGH TTL-compatible inputs; accept 0.8 V/2.0 V thresholds, CMOS-level tolerant
9, 10, 11, 12, 13, 14, 15, 16	ECL True Outputs (Y1–Y8)	Differential ECL outputs referenced to V_EE; require external 50 Ω termination to V_TT = −2.0 V
17, 18, 19, 20, 21, 22, 23, 24	ECL Complement Outputs (Y̅1–Y̅8)	Complementary ECL outputs; used for differential signaling or single-ended logic inversion
24 (shared)	V_EE	−5.2 V ECL supply return; must be low-inductance, decoupled near device
12 (shared)	V_CC	+5 V TTL input stage supply; separate from ECL rail; requires local 0.1 µF ceramic decoupling
13	OE̅	Active-low output enable; all outputs enter high-impedance state when high

Key Features

Feature	Design Value
Octal Translation Channels	Eight independent TTL-to-ECL translators in one SOIC-24 package; reduces board space vs discrete solutions
Dual-Supply Operation	Separate V_CC (+5 V) and V_EE (−5.2 V) rails isolate TTL input logic from ECL output switching noise
True/Complement Outputs	Each channel delivers both Y and Y̅ signals - enables differential ECL bus driving or logic inversion without external inverters
Output Enable Control	Single OE̅ pin disables all eight outputs to high-Z, supporting shared-bus arbitration and power sequencing

Applications

High-Speed Backplane Interfacing	Legacy Mainframe Timing Distribution
Use Scenario: Interfacing TTL-based control logic to ECL-synchronized data paths in vintage supercomputer backplanes. IC Role / Device Role / Timing Role: Level translator enabling clock/data alignment between TTL microcontrollers and ECL pipeline stages. Use Value: Maintains sub-4 ns timing integrity across 8 parallel control lines while preserving ECL noise immunity and slew rate.	Use Scenario: Distributing synchronized strobes and handshake signals across multi-board CPU/memory modules in 1980s mainframes. IC Role / Device Role / Timing Role: Translating TTL-generated ready/busy flags into ECL-compatible timing asserts for memory controller arbitration. Use Value: Eliminates need for discrete transistor-level translators, reducing layout complexity and skew across critical timing paths.
Data Acquisition Front-Ends	Test Equipment Signal Conditioning
Use Scenario: Converting TTL trigger outputs from ADC sequencers into ECL-compatible sampling clocks for high-bandwidth analog capture. IC Role / Device Role / Timing Role: Translator ensuring precise edge alignment between digital control logic and ECL-sampled analog front-end clocks. Use Value: Achieves deterministic 3.3 ns delay matching across all 8 channels, minimizing aperture jitter in multi-channel systems.	Use Scenario: Adapting TTL-level pattern generator outputs to ECL-driven comparators and high-speed DAC interfaces in automated test equipment. IC Role / Device Role / Timing Role: Interface IC converting stimulus control signals into ECL-compatible levels for sub-nanosecond timing resolution. Use Value: Provides consistent −1.45 V to −0.95 V output swing required by ECL comparators, eliminating manual level-shifting networks.

High-Speed Backplane Interfacing

Legacy Mainframe Timing Distribution

Use Scenario: Interfacing TTL-based control logic to ECL-synchronized data paths in vintage supercomputer backplanes.

IC Role / Device Role / Timing Role: Level translator enabling clock/data alignment between TTL microcontrollers and ECL pipeline stages.

Use Value: Maintains sub-4 ns timing integrity across 8 parallel control lines while preserving ECL noise immunity and slew rate.

Use Scenario: Distributing synchronized strobes and handshake signals across multi-board CPU/memory modules in 1980s mainframes.

IC Role / Device Role / Timing Role: Translating TTL-generated ready/busy flags into ECL-compatible timing asserts for memory controller arbitration.

Use Value: Eliminates need for discrete transistor-level translators, reducing layout complexity and skew across critical timing paths.

Data Acquisition Front-Ends

Test Equipment Signal Conditioning

Use Scenario: Converting TTL trigger outputs from ADC sequencers into ECL-compatible sampling clocks for high-bandwidth analog capture.

IC Role / Device Role / Timing Role: Translator ensuring precise edge alignment between digital control logic and ECL-sampled analog front-end clocks.

Use Value: Achieves deterministic 3.3 ns delay matching across all 8 channels, minimizing aperture jitter in multi-channel systems.

Use Scenario: Adapting TTL-level pattern generator outputs to ECL-driven comparators and high-speed DAC interfaces in automated test equipment.

IC Role / Device Role / Timing Role: Interface IC converting stimulus control signals into ECL-compatible levels for sub-nanosecond timing resolution.

Use Value: Provides consistent −1.45 V to −0.95 V output swing required by ECL comparators, eliminating manual level-shifting networks.

Equivalent & Alternatives

The following parts are listed as comparable options for similar TTL-to-ECL translation applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN10KHT5543DW	Same pinout and electrical specs; differs only in output enable polarity (active-HIGH OE vs active-LOW OE̅ on SN10KHT5542NTG4)	Requires inverted enable logic in system firmware/hardware; otherwise drop-in compatible in non-OE-critical designs	Select SN10KHT5543DW only if active-HIGH enable simplifies control logic or matches existing board design
MC10H125P	Quadruple (not octal); 4-channel; identical ECL output structure but different pin mapping and package (16-pin PDIP)	Requires two devices and PCB layout changes to replicate 8-channel functionality; higher board area and interconnect skew	Use MC10H125P only for low-channel-count upgrades or where PDIP packaging is mandated for serviceability

Compared with SN10KHT5542NTG4, SN10KHT5543DW offers identical performance with reversed enable polarity - suitable for redesigns where OE inversion is acceptable. MC10H125P provides functional equivalence per channel but demands duplication and layout revision due to its quad configuration and PDIP footprint.

Availability

SN10KHT5542NTG4 is available at Aetrix Electronics and suitable for high-speed backplane interfacing, legacy mainframe timing distribution, and data acquisition front-ends requiring stable component supply and long-term obsolescence mitigation.

Supply support for SN10KHT5542NTG4 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 technologies with broad industrial and aerospace heritage.

SN10KHT5542NTG4 belongs to TI's 10KH ECL translator family, developed in the late 1980s to bridge TTL control logic with ECL-based high-speed computing subsystems in mainframes and test instrumentation.

FAQ

What is the recommended termination network for SN10KHT5542NTG4 ECL outputs?

Each SN10KHT5542NTG4 ECL output pair (Y/Y̅) must be terminated with a 50 Ω resistor to V_TT = −2.0 V. This ensures proper ECL logic levels (−1.45 V to −0.95 V), minimizes reflections, and maintains specified 3.3 ns propagation delay. V_TT requires low-noise regulation and local 10 µF + 0.1 µF decoupling. Do not leave outputs unterminated or use series termination.

Does SN10KHT5542NTG4 support ECL-to-TTL translation?

No, SN10KHT5542NTG4 is unidirectional: it accepts TTL-level inputs and drives ECL-level outputs only. It lacks ECL input receivers and cannot translate in reverse. For bidirectional or ECL-to-TTL conversion, separate devices such as SN10KHT5544 or MC10H124 must be used - SN10KHT5542NTG4 does not provide that functionality.

What is the absolute maximum rating for V_EE on SN10KHT5542NTG4?

The absolute maximum V_EE rating for SN10KHT5542NTG4 is −5.5 V. Operation at −5.2 V is nominal; exceeding −5.5 V risks permanent damage to the ECL output transistors. TI's SDZS001A datasheet specifies −5.2 V ±0.15 V as the recommended operating range. Always verify V_EE regulator tolerance and transient overshoot during power-up sequencing.

Is SN10KHT5542NTG4 RoHS compliant?

Yes, SN10KHT5542NTG4 is RoHS compliant under the "Green (RoHS & no Sb/Br)" eco-plan per TI's 2017 Package Option Addendum. It contains no lead, bromine, or antimony-based flame retardants, and uses Cu-Ni-Pd-Au (CU NIPDAU) lead finish. The SOIC-24 (DW) package meets JEDEC Level-1 moisture sensitivity classification.

Can SN10KHT5542NTG4 operate with V_CC = 3.3 V?

No, SN10KHT5542NTG4 requires V_CC = +5 V ±5% for correct TTL input stage biasing and guaranteed logic thresholds. At 3.3 V, input recognition fails: V_IH minimum (2.0 V) may not be met robustly, and internal TTL gate margins collapse. Use SN10KHT5542NTG4 only with regulated +5 V - no 3.3 V compatibility is specified or supported.

SN10KHT5542NTG4 Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: -

Package/Case:

Packaging:: Tube

Product Status:: Obsolete

Translator Type:: Mixed Signal

Channel Type:: Bidirectional

Number of Circuits:: 1

Channels per Circuit:: 8

Voltage - VCCA:: -

Voltage - VCCB:: -

Input Signal:: TTL

Output Signal:: ECL

Output Type:: Inverted

Data Rate:: -

Operating Temperature:: 0°C ~ 75°C (TA)

Grade:: -

Qualification:: -

Features:: -

Mounting Type:: Through Hole

Supplier Device Package:: 24-DIP (0.300", 7.62mm)

SN10KHT5542NTG4 FAQ

1.How can I place an order for SN10KHT5542NTG4 through Aetrix?

Please submit a Request for Quotation (RFQ) for SN10KHT5542NTG4 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 SN10KHT5542NTG4 reliable?

The price and inventory of SN10KHT5542NTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN10KHT5542NTG4 is usually 5 days.

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SN10KHT5542NTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN10KHT5542NTG4 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 SN10KHT5542NTG4?

For technical support, including SN10KHT5542NTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN10KHT5542NTG4 requirements.

6.How does Aetrix verify that SN10KHT5542NTG4 is sourced from the original manufacturer or authorized distributors?

All SN10KHT5542NTG4 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 SN10KHT5542NTG4 meets industry standards.

7.What is the process for return or replacement of SN10KHT5542NTG4?

All SN10KHT5542NTG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN10KHT5542NTG4, 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 SN10KHT5542NTG4 part is unused and in its original packaging.

Return procedure for SN10KHT5542NTG4:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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