Year: 2025

4558D Datasheet, JRC NJM4558D PDF – Dual OP AMP

Posted on by pinout

The 4558D (also known as NJM4558D / JRC4558) is a dual operational amplifier consisting of two internally compensated, high-gain op-amps integrated on a single silicon die.

Part Number: JRC4558, NJM4558D

Function: DUAL OPERATIONAL AMPLIFIER

Package: DIP 8 Pin Type

Manufacturer: Japan Radio Corporation

Image

4558D datasheet pdf

Description

The 4558D, NJM4559 integrated circuit is a dual high-gain operational amplifier internally compensated and constructed on a single silicon chip using an advanced epitaxial process.

Combining the features of the NJM741 with the close parameter matching and tracking of a dual device on a monolithic chip results in unique performance characteristics. Excellent channel separation allows the use of the dual device in single NJM741 operational amplifier applications providing density. It is especially well suited for applications in differential-in, differential-out as well as in potentiometric amplifiers and where gain and phase matched channels are mandatory.

Features

  • Wide operating supply range: ±4V to ±18V
  • High open-loop voltage gain (~100 dB typical)
  • High input resistance (~5 MΩ typical)
  • Good channel separation and matching
  • Bipolar input stage (better noise than early general-purpose op-amps)
  • Stable without external compensation
  • Available in standard DIP and SOP packages

Pin Configuration (8-Pin Dual Op-Amp)

4558d datasheet

  • Pin 1: Output 1
  • Pin 2: Inverting Input 1 (-)
  • Pin 3: Non-inverting Input 1 (+)
  • Pin 4: V– (Negative supply or GND)
  • Pin 5: Non-inverting Input 2 (+)
  • Pin 6: Inverting Input 2 (-)
  • Pin 7: Output 2
  • Pin 8: V+ (Positive supply)

Key Electrical Characteristics (Typical)

  • Open-loop gain: ~100 dB
  • Input bias current: ~200 nA
  • Input offset voltage: ~1–5 mV
  • Slew rate: ~1 V/µs
  • Gain-bandwidth product: ~3 MHz

Typical Circuit Usage

  • Audio preamplifiers and tone control circuits
  • Active filters (low-pass, high-pass, band-pass)
  • Signal conditioning and buffering
  • Differential amplifier stages
  • Integrator and comparator (non-critical timing)

How to Choose This Part

  • Use when moderate performance and low cost are priorities
  • Ideal for audio-frequency applications (<100kHz)
  • Suitable when dual op-amp matching is required
  • Not recommended for precision low-offset or rail-to-rail designs
  • Consider modern CMOS op-amps for low-power or high-speed needs

Applications

  • Audio amplifiers and mixers
  • Instrumentation and signal processing
  • Industrial analog control circuits
  • Consumer electronics
  • General-purpose analog design

Alternative / Equivalent Products

  • LM358 (single-supply, lower power alternative)
  • TL072 (JFET input, lower noise for audio)
  • NE5532 (high-performance audio op-amp)
  • OPA2134 (audiophile-grade op-amp)
  • MC1458 (older equivalent dual op-amp)

Other data sheets are available within the file: JRC4558, JRC4559, NJM4558M, NJM4558L, NJM4558V

4558D Datasheet PDF Download

JRC4558 pdf

BDW53 Datasheet PDF – 45V, 4A, NPN Transistor, TO-220

Posted on by pinout

Part Number: BDW53

Function: 45V, 4A, NPN Silicon Power Darlington Transistor

Package: TO-220 Type

Manufacturer: Bourns, Inc

Image

BDW53 datasheet pdf

Description

The BDW53 is a 45V, 4A NPN Darlington power transistor designed for high-current switching and amplification applications, typically available in a TO-220 package. It features high current gain, strong thermal performance, and compatibility with complementary PNP devices in the BDW54 series. This device is commonly used in motor control, power regulators, and audio amplifier output stages.

Features

  • High current gain with minimum hFE of 750 at IC=1.5A
  • Power dissipation up to 40W at TC=25°C
  • Designed for complementary pairing with BDW54 series
  • Integrated Darlington configuration for high amplification

Pinout

BDW53 datasheet

Absolute Maximum Ratings (Tc = 25 °C)

Parameter Symbol Value Unit
Collector-Base Voltage VCBO 45 V
Collector-Emitter Voltage VCEO 45 V
Emitter-Base Voltage VEBO 5 V
Collector Current IC 4 A
Total Power Dissipation Ptot 40 W
Junction Temperature Tj 150 °C
Storage Temperature Tstg -55 to 150 °C

Design Notes

  • Due to Darlington configuration, expect higher VCE(sat) compared to single BJTs
  • Ensure proper heat sinking to maintain junction temperature within safe limits
  • Base drive requirements are lower due to high current gain but must be controlled to avoid overdrive
  • Consider switching speed limitations inherent to Darlington pairs
  • Include flyback diodes when driving inductive loads

Typical Circuit Usage

  • Low-side switching for motors and relays
  • Linear voltage regulator pass transistor stage
  • Audio amplifier output stage (class B or AB)
  • LED strip or high-current load drivers
  • Power control circuits with microcontroller interface

How to Choose This Part

  • Select when high current gain is required with minimal base drive
  • Suitable for applications below 45V and up to 4A load current
  • Prefer when thermal dissipation can be managed effectively
  • Use when complementary pairing with BDW54 is needed
  • Not ideal for high-speed switching applications due to slower response

Applications

  • Motor drivers and actuator control
  • Power supply regulation circuits
  • Audio amplification systems
  • Industrial control systems
  • Lighting control and LED drivers

Alternative / Equivalent Products

  • BDW54 (PNP complementary pair)
  • TIP122 (NPN Darlington transistor)
  • TIP120 (lower voltage alternative)
  • MJE800 series (power transistor alternatives)
  • 2N6284 (similar Darlington transistor)

 

Other data sheets are available within the file: BDW53A, BDW53B, BDW53C, BDW53D

BDW53 Datasheet PDF Download


BDW53 pdf