HFA1145IPZ Equivalent & Substitute Parts

Part Overview

The HFA1145IPZ is a current feedback video amplifier manufactured by Renesas Electronics Corporation, housed in an 8-DIP through-hole package. This linear amplifier is designed for high-speed current feedback applications with a -3dB bandwidth of 330 MHz and slew rate of 2100V/µs. The device is classified as obsolete, making identification of suitable substitute components necessary for ongoing system support, maintenance, and new design implementations where legacy compatibility is required.

Substiute Parts

HFA1145IPZ

Renesas Electronics CorporationIn Stock: 1123HFA1145IPZ Datasheet

Current PartRFQ

LT1227CN8#PBF

Analog Devices Inc.In Stock: 1886LT1227CN8#PBF Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the HFA1145IPZ is determined by compatibility across the following critical parameters:

Package and Mounting Compatibility: Both the main part and substitute must utilize the 8-DIP (0.300", 7.62mm) through-hole package format to ensure direct board-level compatibility without layout modifications.

Functional Classification: The substitute must operate as a current feedback amplifier with a single circuit configuration, maintaining the same functional application category.

Electrical Performance Envelope: The substitute must operate within the specified supply voltage ranges and deliver the required output current per channel (60 mA). Bandwidth and slew rate specifications define performance capability; substitutes with lower performance metrics may be acceptable for applications not requiring maximum performance, while higher performance substitutes provide enhanced capability.

Regulatory and Compliance Status: Both parts must maintain ROHS3 compliance, REACH unaffected status, and identical moisture sensitivity classification to ensure regulatory and environmental compatibility.

Supply Voltage Flexibility: The substitute voltage supply range must encompass or exceed the original part's operating range to ensure compatibility with existing power supply designs.

Parameter Comparison

Engineering Selection Recommendations

The LT1227CN8#PBF from Analog Devices Inc. is a direct substitute for the obsolete HFA1145IPZ. Both devices share identical package geometry (8-DIP), functional classification (current feedback amplifier), output current capability (60 mA per channel), and regulatory compliance status (ROHS3, REACH unaffected, MSL 1).

The LT1227CN8#PBF maintains active product status, ensuring long-term availability and supply chain continuity. The substitute's supply voltage range (4V ~ 30V single, ±2V ~ 15V dual) encompasses the original part's operating envelope (9V ~ 11V single, ±4.5V ~ 5.5V dual), providing enhanced flexibility for power supply design.

Performance differences exist in bandwidth (140 MHz versus 330 MHz) and slew rate (1100V/µs versus 2100V/µs). These differences reflect the substitute's lower performance specification. Applications requiring the full performance envelope of the HFA1145IPZ must evaluate whether the LT1227CN8#PBF meets specific bandwidth and slew rate requirements. The substitute's higher supply current (10 mA versus 5.8 mA) represents increased power consumption and must be considered in power budget calculations.

Frequently Asked Questions (FAQ)

Q: Can the LT1227CN8#PBF be used as a direct pin-for-pin replacement for the HFA1145IPZ?

A: Yes. Both devices utilize the 8-DIP (0.300", 7.62mm) through-hole package with identical pin configurations for current feedback amplifier applications. No board layout modifications are required for physical substitution.

Q: What are the key differences between these two parts?

A: The primary differences are bandwidth (HFA1145IPZ: 330 MHz; LT1227CN8#PBF: 140 MHz), slew rate (HFA1145IPZ: 2100V/µs; LT1227CN8#PBF: 1100V/µs), supply current (HFA1145IPZ: 5.8 mA; LT1227CN8#PBF: 10 mA), and product status (HFA1145IPZ: obsolete; LT1227CN8#PBF: active). Output current capability and package format are identical.

Q: Is the LT1227CN8#PBF suitable for all applications using the HFA1145IPZ?

A: The LT1227CN8#PBF is suitable for applications where the specified bandwidth (140 MHz) and slew rate (1100V/µs) meet system requirements. Applications requiring the full performance specification of the HFA1145IPZ must evaluate whether the lower performance metrics of the substitute are acceptable.

Q: What is the supply voltage compatibility between these parts?

A: The HFA1145IPZ operates at 9V ~ 11V (single) or ±4.5V ~ 5.5V (dual). The LT1227CN8#PBF operates at 4V ~ 30V (single) or ±2V ~ 15V (dual). The substitute's wider voltage range provides compatibility with the original part's operating envelope and additional flexibility for alternative power supply configurations.

Q: Are both parts compliant with current regulatory standards?

A: Yes. Both the HFA1145IPZ and LT1227CN8#PBF are ROHS3 compliant, REACH unaffected, and classified as MSL 1 (unlimited moisture sensitivity level). Both parts meet current environmental and regulatory requirements.

Q: Why is the HFA1145IPZ listed as obsolete?

A: The HFA1145IPZ is classified as obsolete by Renesas Electronics Corporation, indicating that the manufacturer has discontinued production and support. The LT1227CN8#PBF maintains active product status, ensuring continued availability and manufacturer support.

Q: What packaging format is used for the LT1227CN8#PBF?

A: The LT1227CN8#PBF is supplied in tube packaging. The device itself is housed in an 8-DIP (0.300", 7.62mm) through-hole package, identical to the HFA1145IPZ.