100ELT22M Mixed Signal Translator Equivalent & Substitute Parts

Part Overview

The 100ELT22M is a mixed signal translator IC manufactured by onsemi, designed for unidirectional signal translation between TTL input and PECL output logic families. This component operates across the industrial temperature range of -40°C to 85°C and is housed in an 8-SOIC surface mount package. The part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Key Parameters

Parameter	Value
Manufacturer Part Number	100ELT22M
Manufacturer	onsemi
Translator Type	Mixed Signal
Channel Type	Unidirectional
Number of Circuits	1
Channels per Circuit	2
Input Signal	TTL
Output Signal	PECL
Output Type	Differential
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Package / Case	8-SOIC (0.154", 3.90mm Width)
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the 100ELT22M is determined by the following critical parameters:

Primary Substitution Criteria:

Translator Type: Mixed Signal
Channel Type: Unidirectional
Number of Circuits: 1
Channels per Circuit: 2
Output Type: Differential
Operating Temperature Range: -40°C ~ 85°C (TA)
Mounting Type: Surface Mount
Moisture Sensitivity Level: 1 (Unlimited)

Package Compatibility Levels:

Direct Package Match: 8-SOIC (0.154", 3.90mm Width)
Alternative Package: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) or 8-VSSOP

Signal Translation Compatibility:

Direct Match: TTL input to PECL output
Compatible Alternative: LVTTL input to LVPECL or PECL output

Parts are classified as direct substitutes when they maintain identical package, signal translation, and electrical specifications. Parts with alternative packages or modified input signal specifications (LVTTL instead of TTL) are classified as similar substitutes, requiring PCB layout and signal integrity verification.

Parameter Comparison

Part Number	Manufacturer	Translator Type	Channel Type	Circuits	Channels/Circuit	Input Signal	Output Signal	Output Type	Operating Temp	Package	Product Status	RoHS Status
100ELT22M	onsemi	Mixed Signal	Unidirectional	1	2	TTL	PECL	Differential	-40°C ~ 85°C	8-SOIC	Obsolete	Not Specified
MC100ELT22DG	onsemi	Mixed Signal	Unidirectional	1	2	TTL	PECL	Differential	-40°C ~ 85°C	8-SOIC	Obsolete	ROHS3 Compliant
SN65ELT22DR	Texas Instruments	Mixed Signal	Unidirectional	1	2	TTL	PECL	Differential	-40°C ~ 85°C	8-SOIC	Active	ROHS3 Compliant
SY100ELT22ZG	Microchip Technology	Mixed Signal	Unidirectional	1	2	LVTTL	PECL	Differential	-40°C ~ 85°C	8-SOIC	Active	ROHS3 Compliant
SY100ELT22ZG-TR	Microchip Technology	Mixed Signal	Unidirectional	1	2	LVTTL	PECL	Differential	-40°C ~ 85°C	8-SOIC	Active	ROHS3 Compliant
MAX9372EUA+	Analog Devices Inc./Maxim Integrated	Mixed Signal	Unidirectional	1	2	LVTTL, TTL	LVPECL, PECL	Differential	-40°C ~ 85°C	8-TSSOP, 8-MSOP	Active	ROHS3 Compliant
SN65LVELT22DGK	Texas Instruments	Mixed Signal	Unidirectional	1	2	LVTTL	LVPECL	Differential	-40°C ~ 85°C	8-VSSOP	Active	ROHS3 Compliant
SN65LVELT22DR	Texas Instruments	Mixed Signal	Unidirectional	1	2	LVTTL	LVPECL	Differential	-40°C ~ 85°C	8-SOIC	Active	ROHS3 Compliant
SY100ELT22LZG	Microchip Technology	Mixed Signal	Unidirectional	1	2	LVTTL	PECL	Differential	-40°C ~ 85°C	8-SOIC	Active	ROHS3 Compliant
SY100ELT22LZG-TR	Microchip Technology	Mixed Signal	Unidirectional	1	2	LVTTL	PECL	Differential	-40°C ~ 85°C	8-SOIC	Active	ROHS3 Compliant

Engineering Selection Recommendations

Direct Substitutes (Identical Electrical and Package Specifications):

MC100ELT22DG from onsemi is the primary direct substitute for 100ELT22M. Both parts maintain TTL-to-PECL translation with identical 8-SOIC packaging and operating temperature range. MC100ELT22DG carries ROHS3 compliance certification, providing regulatory advantage over the original part. Inventory availability is significantly higher at 5049 units.

SN65ELT22DR from Texas Instruments is an active product direct substitute maintaining TTL-to-PECL translation in 8-SOIC packaging. This part is actively manufactured and supported, with 7950 units in stock. ROHS3 compliance and active product status provide long-term supply security.

Compatible Substitutes (Modified Input Signal Specification):

SY100ELT22ZG and SY100ELT22ZG-TR from Microchip Technology accept LVTTL input instead of TTL input while maintaining PECL output in 8-SOIC packaging. These parts are active products with ROHS3 compliance. The LVTTL input specification requires signal level verification in the target application but maintains functional equivalence for systems operating within LVTTL voltage thresholds.

SY100ELT22LZG and SY100ELT22LZG-TR from Microchip Technology provide identical functionality to the ZG variants with alternative packaging options (Tube vs. Cut Tape & Digi-Reel).

Alternative Package Substitutes:

MAX9372EUA+ from Analog Devices Inc./Maxim Integrated provides TTL and LVTTL input compatibility with LVPECL and PECL output in 8-TSSOP/8-MSOP packaging. This part is actively manufactured with ROHS3 compliance. PCB layout modification is required due to package size reduction from 8-SOIC to 8-TSSOP/8-MSOP.

SN65LVELT22DGK and SN65LVELT22DR from Texas Instruments provide LVTTL-to-LVPECL translation in alternative packages (8-VSSOP and 8-SOIC respectively). These parts are active products with ROHS3 compliance. Signal level compatibility must be verified for applications originally designed for TTL-to-PECL translation.

Frequently Asked Questions (FAQ)

Q: Can MC100ELT22DG directly replace 100ELT22M without PCB modification?

A: Yes. MC100ELT22DG maintains identical electrical specifications (TTL input, PECL output, differential output type), circuit configuration (1 circuit, 2 channels), and 8-SOIC package dimensions. No PCB layout changes are required.

Q: What is the difference between SY100ELT22ZG and SY100ELT22LZG?

A: Both parts accept LVTTL input and produce PECL output in 8-SOIC packaging. The primary difference is packaging format: ZG is supplied in Tube, while LZG is supplied in Tube. Both are functionally equivalent for circuit operation.

Q: Can SN65LVELT22DR replace 100ELT22M in existing designs?

A: SN65LVELT22DR maintains the 8-SOIC package and operating temperature range but translates LVTTL input to LVPECL output instead of TTL to PECL. This substitution requires signal level verification. If the original design operates with TTL-level input signals, LVTTL input compatibility must be confirmed. If PECL output levels are required, LVPECL output levels must be verified as acceptable.

Q: Why is MAX9372EUA+ listed as a similar substitute despite different packaging?

A: MAX9372EUA+ provides functional equivalence in mixed signal translation (1 circuit, 2 channels, unidirectional, differential output) with active product status and ROHS3 compliance. The 8-TSSOP/8-MSOP package is smaller than 8-SOIC, requiring PCB layout redesign. This part is included for applications where package size reduction is acceptable or beneficial.

Q: What does ROHS3 compliance mean for component selection?

A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead and other hazardous materials. Parts with ROHS3 certification are suitable for applications with environmental or regulatory compliance requirements. The original 100ELT22M does not specify RoHS status, while all listed substitutes carry ROHS3 compliance.

Q: Are there differences in moisture sensitivity between substitute parts?

A: All listed parts maintain Moisture Sensitivity Level (MSL) 1, indicating unlimited shelf life without moisture control requirements. No differences in moisture handling procedures are necessary when substituting between these parts.

Q: What is the significance of product status (Active vs. Obsolete)?

A: Active products are currently manufactured and supported by their respective manufacturers, ensuring long-term availability and technical support. Obsolete products have been discontinued. SN65ELT22DR, SY100ELT22ZG, SY100ELT22ZG-TR, MAX9372EUA+, SN65LVELT22DGK, SN65LVELT22DR, SY100ELT22LZG, and SY100ELT22LZG-TR are all active products, providing supply continuity advantages over the obsolete 100ELT22M.

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