LT1253CS8 Equivalent & Substitute Parts

Part Overview

The LT1253CS8 is a dual-channel current feedback video amplifier manufactured by Analog Devices Inc., housed in an 8-SOIC surface mount package. This linear amplifier is designed for high-speed current feedback applications requiring wide bandwidth and fast slew rate performance. The part is currently active in production with 4,820 units in stock.

Equivalent and substitute parts are necessary when the primary part number becomes unavailable, when alternative packaging formats are required for manufacturing processes, or when design flexibility permits the use of functionally compatible alternatives from different manufacturers or product lines.

Key Parameters

Parameter	Value
Manufacturer	Analog Devices Inc.
Part Number	LT1253CS8
Category	Linear, Amplifiers
Package / Case	8-SOIC (0.154", 3.90mm Width)
Number of Circuits	2
-3dB Bandwidth	270 MHz
Slew Rate	250 V/µs
Voltage - Supply, Single/Dual (±)	4V ~ 28V, ±2V ~ 14V
Current - Supply	6 mA
Current - Output / Channel	55 mA
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Active

Substitute Part Grouping Explanation

Substitution of the LT1253CS8 is determined by the following critical parameters:

Packaging Compatibility: All substitute parts must use the 8-SOIC (0.154", 3.90mm Width) surface mount package to ensure mechanical and electrical compatibility with existing PCB layouts.

Electrical Performance: The LT1253CS8 operates as a current feedback amplifier with 270 MHz bandwidth and 250 V/µs slew rate. Substitute parts are grouped into two categories:

Direct Equivalents (Identical Electrical Performance): Parts maintaining the same bandwidth, slew rate, and supply voltage specifications as the LT1253CS8.
Functional Alternatives (Different Electrical Performance): General-purpose operational amplifiers with lower bandwidth (700 kHz) and reduced slew rate (0.3 V/µs) that operate within compatible supply voltage ranges but do not match the high-speed performance characteristics of the original part.

Supply Voltage Compatibility: All substitute parts operate within overlapping supply voltage ranges (minimum 3V to 4V, maximum 26V to 32V), ensuring compatibility with existing power distribution designs.

Compliance Requirements: All substitute parts maintain ROHS3 compliance, MSL Level 1 rating, and EAR99 export classification, matching the regulatory status of the primary part.

Parameter Comparison

Part Number	Manufacturer	Package	Circuits	Bandwidth / GBW	Slew Rate	Supply Voltage (Min-Max)	Current - Supply	Current - Output / Channel	Product Status
LT1253CS8	Analog Devices	8-SOIC	2	270 MHz	250 V/µs	4V ~ 28V (±2V ~ 14V)	6 mA	55 mA	Active
LT1253CS8#PBF	Analog Devices	8-SOIC	2	270 MHz	250 V/µs	4V ~ 28V (±2V ~ 14V)	6 mA	55 mA	Active
LM2904AVQDR	Texas Instruments	8-SOIC	2	700 kHz	0.3 V/µs	3V ~ 30V	500 µA (x2)	40 mA	Active
LM2904AVQDRG4	Texas Instruments	8-SOIC	2	700 kHz	0.3 V/µs	3V ~ 30V	500 µA (x2)	40 mA	Discontinued at DiGi Electronics
LM2904DR	Rohm Semiconductor	8-SOIC	2	700 kHz	0.3 V/µs	3V ~ 26V	1 mA	40 mA	Not For New Designs
LM2904DRG3	Texas Instruments	8-SOIC	2	700 kHz	0.3 V/µs	3V ~ 26V	500 µA (x2)	40 mA	Last Time Buy
LM2904DRG4	Texas Instruments	8-SOIC	2	700 kHz	0.3 V/µs	3V ~ 26V	500 µA (x2)	40 mA	Obsolete
LM2904M/NOPB	Texas Instruments	8-SOIC	2	1 MHz	Not Specified	3V ~ 32V	1 mA	40 mA	Active
LM2904MX/NOPB	Texas Instruments	8-SOIC	2	1 MHz	Not Specified	3V ~ 32V	1 mA	40 mA	Active
LM2904QDR	Texas Instruments	8-SOIC	2	700 kHz	0.3 V/µs	3V ~ 26V	500 µA (x2)	40 mA	Active
LM2904QDRG4	Texas Instruments	8-SOIC	2	700 kHz	0.3 V/µs	3V ~ 26V	500 µA (x2)	40 mA	Last Time Buy

Engineering Selection Recommendations

Direct Equivalent Selection:

The LT1253CS8#PBF is the direct equivalent of the LT1253CS8, differing only in packaging format (Tube versus standard packaging). Both parts are manufactured by Analog Devices Inc., maintain identical electrical specifications, and carry Active product status. Selection between these two part numbers depends solely on manufacturing process requirements: use LT1253CS8#PBF when tube packaging is required for automated assembly equipment.

Functional Alternative Selection:

The LM2904 series from Texas Instruments provides functional alternatives when the high-speed performance of the LT1253CS8 is not required. These parts are general-purpose operational amplifiers with significantly lower bandwidth (700 kHz versus 270 MHz) and reduced slew rate (0.3 V/µs versus 250 V/µs).

Among the LM2904 variants, the following parts maintain Active product status and are suitable for new designs:

LM2904AVQDR: Active status, 700 kHz bandwidth, 0.3 V/µs slew rate, 3V to 30V supply range
LM2904M/NOPB: Active status, 1 MHz gain-bandwidth product, 3V to 32V supply range
LM2904MX/NOPB: Active status, 1 MHz gain-bandwidth product, 3V to 32V supply range, Cut Tape packaging
LM2904QDR: Active status, 700 kHz bandwidth, 0.3 V/µs slew rate, 3V to 26V supply range

Parts with Last Time Buy, Discontinued, Obsolete, or Not For New Designs status should not be selected for new product development. These include LM2904AVQDRG4, LM2904DR, LM2904DRG3, LM2904DRG4, and LM2904QDRG4.

Compliance Verification:

All listed substitute parts maintain ROHS3 compliance, MSL Level 1 rating, and EAR99 export classification, ensuring regulatory compatibility with the original LT1253CS8 specification.

Frequently Asked Questions (FAQ)

Q: Can the LM2904 series directly replace the LT1253CS8 in all applications?

A: No. The LM2904 series is a general-purpose operational amplifier with significantly different electrical performance. The LT1253CS8 is a current feedback amplifier with 270 MHz bandwidth and 250 V/µs slew rate, while the LM2904 series offers 700 kHz bandwidth and 0.3 V/µs slew rate. Direct substitution is only appropriate in applications where the lower bandwidth and slew rate of the LM2904 are acceptable. Applications requiring high-speed video amplification or fast transient response must use the LT1253CS8 or equivalent current feedback amplifiers.

Q: What is the difference between LT1253CS8 and LT1253CS8#PBF?

A: Both parts are electrically identical and manufactured by Analog Devices Inc. The primary difference is packaging format: LT1253CS8 uses standard packaging, while LT1253CS8#PBF uses Tube packaging. The #PBF designation indicates lead-free, RoHS-compliant construction. Selection depends on manufacturing equipment compatibility and assembly process requirements.

Q: Are all substitute parts available in the same 8-SOIC package?

A: Yes. All listed substitute parts use the 8-SOIC (0.154", 3.90mm Width) surface mount package, ensuring mechanical compatibility with existing PCB layouts and assembly equipment.

Q: Which substitute parts are recommended for new product designs?

A: For new designs requiring current feedback amplifier performance equivalent to the LT1253CS8, use LT1253CS8#PBF. For new designs where general-purpose operational amplifier performance is acceptable, use LM2904AVQDR, LM2904M/NOPB, LM2904MX/NOPB, or LM2904QDR, all of which carry Active product status. Avoid parts marked as Last Time Buy, Discontinued, Obsolete, or Not For New Designs.

Q: What are the supply voltage compatibility ranges for substitution?

A: The LT1253CS8 operates at 4V to 28V (single supply) or ±2V to ±14V (dual supply). The LM2904 series operates at 3V to 26V or 3V to 32V depending on the specific variant. All substitute parts operate within overlapping voltage ranges, but designs using the full 28V single-supply range of the LT1253CS8 must verify that the selected substitute part supports this maximum voltage.

Q: What is the significance of the product status field?

A: Product status indicates the manufacturing lifecycle stage. Active parts are in full production and recommended for new designs. Last Time Buy indicates limited remaining inventory with no future production. Discontinued at DiGi Electronics indicates the part is no longer available through this distributor. Obsolete and Not For New Designs indicate the part should not be used in new product development. Only Active status parts should be selected for new designs.

Q: How do the current consumption specifications differ between the LT1253CS8 and LM2904 alternatives?

A: The LT1253CS8 draws 6 mA supply current with 55 mA output current per channel. The LM2904 series draws significantly less supply current (500 µA to 1 mA) with 40 mA output current per channel. Applications with strict power budget constraints may benefit from the lower supply current of the LM2904 series, but this comes at the cost of reduced bandwidth and slew rate performance.

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