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

Texas Instruments SN65EPT22DGK

Name: SN65EPT22DGK
Brand: Texas Instruments
SKU: SN65EPT22DGK
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN65EPT22DGK

Manufacturer:: Texas Instruments

Category:: Translators, Level Shifters

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Datasheet:: SN65EPT22DGK.pdf

Description:: IC TRANSLATOR UNIDIR 8VSSOP

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Product details

Overview

SN65EPT22DGK from Texas Instruments is a dual 3.3 V LVTTL/LVCMOS-to-LVPECL buffer IC used for high-speed signaling level translation in clock and data paths. It delivers deterministic HIGH output during open-input conditions, supports up to 2.0 GHz switching frequency (typ), exhibits 420 ps typical propagation delay, and operates across –40°C to 85°C ambient temperature.

For engineers reviewing the SN65EPT22DGK datasheet, SN65EPT22DGK pinout, SN65EPT22DGK application, or SN65EPT22DGK equivalent, this device is selected for backplane clock distribution, differential timing interface design, and low-skew LVPECL signal generation where deterministic input handling and thermal-stable PECL output voltage compliance are required.

Technical Context

The SN65EPT22DGK implements two independent PNP-based single-ended TTL inputs driving complementary LVPECL outputs terminated to VCC – 2.0 V via external 50 Ω resistors. Its internal circuitry maintains known logic HIGH at outputs under open-input conditions without pull-up resistors.

It features built-in temperature compensation to stabilize output DC levels across –40°C to 85°C, and supports deterministic skew control: within-device skew ≤50 ps (max), device-to-device skew ≤200 ps (max), with random jitter as low as 0.2 ps RMS.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply voltage	3.0 V to 3.6 V - ensures compatibility with standard 3.3 V LVTTL/LVCMOS logic domains while maintaining LVPECL output compliance.
Max switching frequency	2.0 GHz (typ) - enables use in high-speed serial clock distribution and DDR memory timing interfaces.
Propagation delay	420 ps (typ) - provides predictable timing margin for sub-nanosecond synchronous systems.
Output voltage swing	VOH = 2224 mV, VOL = 1441 mV (typ, 50 Ω to VCC – 2.0 V) - meets LVPECL standard common-mode and differential amplitude requirements.
Input voltage thresholds	VIH = 2.0 V, VIL = 0.8 V - guarantees robust noise immunity against LVTTL/LVCMOS logic families.
Power supply current	45 mA (typ at 25°C) - enables low-power operation in multi-channel timing subsystems.
Operating temperature	–40°C to +85°C - supports industrial-grade deployment in embedded computing and communications equipment.

Pinout & Package

VSSOP-8 package (DGK), 3.00 mm × 3.00 mm body size, 1.1 mm max height, lead-free NIPDAU finish, MSL Level-1, RoHS compliant.

Pin/Terminal	Circuit Role	Design Meaning
D0	LVTTL/LVCMOS data input	Single-ended digital input referenced to GND; accepts 0.8 V/2.0 V logic thresholds.
D1	LVTTL/LVCMOS data input	Independent second input channel with identical DC/AC characteristics as D0.
Q0	LVPECL true output	Active-HIGH differential output pair leg; requires 50 Ω termination to VCC – 2.0 V.
Q0̅	LVPECL complement output	Complementary leg of first differential output; defines differential swing with Q0.
Q1	LVPECL true output	Second independent LVPECL output pair true leg; electrically isolated from Q0/Q0̅ path.
Q1̅	LVPECL complement output	Complement leg of second differential output; enables dual-channel PECL signaling.
VCC	Positive supply	3.3 V power rail shared by both channels; supplies internal bias and output drivers.
GND	Ground reference	Common return for inputs, internal circuitry, and output termination network reference.

Key Features

Feature	Design Value
Dual-channel LVTTL-to-LVPECL translation	Enables compact replacement of two discrete translators in clock fanout or data serialization paths.
Deterministic HIGH output on open input	Eliminates need for external pull-up resistors, reducing BOM count and layout complexity in unterminated stubs.
Built-in temperature compensation	Maintains stable VOH/VOL over –40°C to 85°C, avoiding manual calibration or external feedback loops.
Drop-in compatibility with MC100ELT23	Allows legacy design reuse without PCB revision when upgrading to TI's lower-power, wider-VCC-range solution.
PNP single-ended inputs	Minimizes capacitive loading on upstream LVTTL sources, preserving signal integrity in high-fanout clock trees.

Applications

Backplane Clock Distribution	Data Serialization Interface
Use Scenario: Distributing a single 1.25 GHz reference clock across multiple line cards in a telecom chassis via FR4 backplane traces. IC Role / Device Role / Timing Role: Translates local LVTTL clock into robust LVPECL differential signals for low-jitter, noise-immune transmission. Use Value: 420 ps propagation delay and ≤50 ps within-device skew ensure tight phase alignment across distributed endpoints.	Use Scenario: Driving parallel LVPECL inputs of a 10 Gbps serializer IC from an FPGA's LVTTL I/O bank. IC Role / Device Role / Timing Role: Bridges voltage-domain mismatch between FPGA core logic and high-speed serializer timing interface. Use Value: 2.0 GHz max frequency and 0.2 ps RMS jitter preserve eye opening and meet SerDes setup/hold timing budgets.
Industrial PLC Timing Module	Test Equipment Clock Synthesis
Use Scenario: Generating synchronized LVPECL clocks for ADC/DAC sampling in a ruggedized programmable logic controller. IC Role / Device Role / Timing Role: Provides thermally stable, open-input tolerant clock buffering in wide-temperature industrial environments. Use Value: Built-in temperature compensation and –40°C to 85°C operation eliminate drift-induced timing errors in closed-loop control systems.	Use Scenario: Converting arbitrary-frequency LVTTL test patterns into clean LVPECL waveforms for jitter tolerance testing of receiver ICs. IC Role / Device Role / Timing Role: Acts as a calibrated, low-skew stimulus source in ATE and lab validation setups. Use Value: Deterministic output behavior and <200 ps device-to-device skew enable repeatable inter-channel correlation measurements.

Backplane Clock Distribution

Data Serialization Interface

Use Scenario: Distributing a single 1.25 GHz reference clock across multiple line cards in a telecom chassis via FR4 backplane traces.

IC Role / Device Role / Timing Role: Translates local LVTTL clock into robust LVPECL differential signals for low-jitter, noise-immune transmission.

Use Value: 420 ps propagation delay and ≤50 ps within-device skew ensure tight phase alignment across distributed endpoints.

Use Scenario: Driving parallel LVPECL inputs of a 10 Gbps serializer IC from an FPGA's LVTTL I/O bank.

IC Role / Device Role / Timing Role: Bridges voltage-domain mismatch between FPGA core logic and high-speed serializer timing interface.

Use Value: 2.0 GHz max frequency and 0.2 ps RMS jitter preserve eye opening and meet SerDes setup/hold timing budgets.

Industrial PLC Timing Module

Test Equipment Clock Synthesis

Use Scenario: Generating synchronized LVPECL clocks for ADC/DAC sampling in a ruggedized programmable logic controller.

IC Role / Device Role / Timing Role: Provides thermally stable, open-input tolerant clock buffering in wide-temperature industrial environments.

Use Value: Built-in temperature compensation and –40°C to 85°C operation eliminate drift-induced timing errors in closed-loop control systems.

Use Scenario: Converting arbitrary-frequency LVTTL test patterns into clean LVPECL waveforms for jitter tolerance testing of receiver ICs.

IC Role / Device Role / Timing Role: Acts as a calibrated, low-skew stimulus source in ATE and lab validation setups.

Use Value: Deterministic output behavior and <200 ps device-to-device skew enable repeatable inter-channel correlation measurements.

Equivalent & Alternatives

The following parts are listed as comparable options for similar LVTTL-to-LVPECL translation applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MC100ELT23DG	Requires 5.0 V supply; no open-input HIGH default; higher ICC (65 mA typ); same SOIC-8 footprint only.	Legacy 5 V systems; lacks thermal compensation; not suitable for 3.3 V-only designs.	Choose only if maintaining 5 V infrastructure and backward compatibility with existing MC100ELT23 layouts.
SN65LVEP22DGK	Supports 2.5 V/3.3 V LVPECL outputs; wider input range (–0.5 V to VCC + 0.5 V); higher fMAX (3 GHz typ); same VSSOP-8 package.	Multi-voltage systems; higher-speed serial links; ESD-hardened (±8 kV HBM).	Prefer for new designs requiring >2 GHz operation, mixed-voltage support, or enhanced robustness in automated test environments.

Compared with MC100ELT23DG and SN65LVEP22DGK, the SN65EPT22DGK offers optimal balance of 3.3 V compatibility, open-input safety, and thermal stability for cost-sensitive industrial clocking-without demanding higher supply rails or advanced process nodes.

Availability

SN65EPT22DGK is available at Aetrix Electronics and suitable for backplane clock distribution, industrial PLC timing modules, and test equipment clock synthesis requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for SN65EPT22DGK 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 specializing in analog, embedded processing, and connectivity technologies, with decades of expertise in high-speed interface solutions.

The SN65EPT22DGK belongs to TI's precision clock translation portfolio, designed specifically for reliable, low-skew voltage-level conversion in industrial, communications, and test instrumentation systems.

FAQ

What is the recommended termination for SN65EPT22DGK LVPECL outputs?

The SN65EPT22DGK LVPECL outputs require 50 Ω resistive termination to VCC – 2.0 V, as specified in Figure 1 of the datasheet. This configuration establishes the correct common-mode voltage (~1.8 V at VCC = 3.3 V) and ensures full differential swing compliance. Using termination to ground or VCC alone will violate output DC specifications and degrade signal integrity.

Does SN65EPT22DGK support LVCMOS input levels in addition to LVTTL?

Yes, SN65EPT22DGK supports both LVTTL and LVCMOS input logic levels. Its VIH = 2.0 V and VIL = 0.8 V thresholds are compatible with 3.3 V LVCMOS I/O standards, and its PNP input structure presents minimal capacitive load (<3 pF), making it suitable for direct connection to FPGA or microcontroller GPIO banks operating at 3.3 V.

Can SN65EPT22DGK operate reliably at 3.0 V supply voltage?

Yes, SN65EPT22DGK is fully specified for VCC = 3.0 V to 3.6 V. At 3.0 V, output voltages shift proportionally (VOH ≈ 2000 mV, VOL ≈ 1250 mV), and AC performance remains functional up to 2.0 GHz, though propagation delay increases slightly to ~470 ps. All DC and AC parameters remain within guaranteed limits per datasheet Section 7.

Is SN65EPT22DGK pin-compatible with SN65EPT22D (SOIC-8)?

No, SN65EPT22DGK (VSSOP-8) and SN65EPT22D (SOIC-8) share identical pin functions but differ in physical layout, pad dimensions, and thermal characteristics. While electrical pin mapping matches (D0/D1, Q0/Q0̅, Q1/Q1̅, VCC, GND), the VSSOP-8 package has 0.65 mm lead pitch versus SOIC-8's 1.27 mm, requiring separate PCB footprints and reflow profiles.

What is the meaning of "deterministic HIGH output for open input" in SN65EPT22DGK?

This means that when either D0 or D1 input is left unconnected (floating), the corresponding LVPECL output pair (Q0/Q0̅ or Q1/Q1̅) defaults to a defined HIGH state - specifically, Qx = HIGH, Qx̅ = LOW - without external biasing. This prevents undefined logic states in unterminated or hot-plug scenarios, enhancing system reliability in modular backplane architectures.

SN65EPT22DGK Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 65EPT

Package/Case:

Packaging:: Bulk

Product Status:: Active

Translator Type:: Mixed Signal

Channel Type:: Unidirectional

Number of Circuits:: 1

Channels per Circuit:: 2

Voltage - VCCA:: -

Voltage - VCCB:: -

Input Signal:: LVCMOS, LVTTL

Output Signal:: LVPECL

Output Type:: Differential

Data Rate:: -

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Features:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)

SN65EPT22DGK FAQ

1.How can I place an order for SN65EPT22DGK through Aetrix?

Please submit a Request for Quotation (RFQ) for SN65EPT22DGK 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 SN65EPT22DGK reliable?

The price and inventory of SN65EPT22DGK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN65EPT22DGK is usually 5 days.

3.What payment methods are accepted for SN65EPT22DGK?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN65EPT22DGK transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SN65EPT22DGK?

SN65EPT22DGK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN65EPT22DGK 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 SN65EPT22DGK?

For technical support, including SN65EPT22DGK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN65EPT22DGK requirements.

6.How does Aetrix verify that SN65EPT22DGK is sourced from the original manufacturer or authorized distributors?

All SN65EPT22DGK 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 SN65EPT22DGK meets industry standards.

7.What is the process for return or replacement of SN65EPT22DGK?

All SN65EPT22DGK units undergo pre-shipment inspection (PSI). If there is an issue with SN65EPT22DGK, 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 SN65EPT22DGK part is unused and in its original packaging.

Return procedure for SN65EPT22DGK:

1.Submit a request within 90 days.

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

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