ISL81483IPZ Equivalent & Substitute Parts

Part Overview

The ISL81483IPZ is a half-duplex RS422/RS485 transceiver manufactured by Renesas Electronics Corporation, housed in an 8-DIP package. This interface IC is designed for industrial communication applications requiring robust serial data transmission over twisted-pair cabling. The part is currently obsolete, making equivalent and substitute components necessary for system redesign, legacy support, or inventory replenishment. Substitute parts must maintain functional compatibility across protocol support, electrical characteristics, and physical packaging to ensure seamless integration into existing or new designs.

Key Parameters

Parameter	ISL81483IPZ
Manufacturer	Renesas Electronics Corporation
Protocol	RS422, RS485
Type	Transceiver Half Duplex
Number of Drivers/Receivers	1/1
Data Rate	250 kbps
Receiver Hysteresis	70 mV
Voltage Supply	4.5V – 5.5V
Operating Temperature	-40°C – 85°C
Package / Case	8-DIP (0.300", 7.62mm)
Mounting Type	Through Hole
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the ISL81483IPZ is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Protocol compatibility: RS422 and RS485 support required
Transceiver configuration: Half-duplex, 1 driver / 1 receiver
Package type: 8-DIP (0.300", 7.62mm) through-hole mounting
Data rate: 250 kbps minimum
Supply voltage range: Must encompass or match 4.5V – 5.5V
Operating temperature range: Must support -40°C – 85°C or equivalent industrial range
RoHS3 compliance and MSL rating: 1 (Unlimited)

Parametric Equivalent: ISL81487LIPZ matches all electrical and mechanical specifications identically, with the distinction of active product status and tube packaging.

Similar Substitutes: LTC1483CN8#PBF, LTC1483IN8#PBF, MAX14780EEPA+, MAX1483CPA+, and MAX1483EPA+ provide functional equivalence with documented parameter variations noted in the comparison table below.

Parameter Comparison

Parameter	ISL81483IPZ	ISL81487LIPZ	LTC1483CN8#PBF	LTC1483IN8#PBF	MAX14780EEPA+	MAX1483CPA+	MAX1483EPA+
Manufacturer	Renesas	Renesas	Analog Devices	Analog Devices	Analog Devices/Maxim	Analog Devices/Maxim	Analog Devices/Maxim
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
Protocol	RS422, RS485	RS422, RS485	RS422, RS485	RS422, RS485	RS422, RS485	RS422, RS485	RS422, RS485
Duplex Configuration	Half	Half	Half	Half	Half	Half	Half
Drivers/Receivers	1/1	1/1	1/1	1/1	1/1	1/1	1/1
Data Rate	250 kbps	250 kbps	250 kbps	250 kbps	500 kbps	250 kbps	250 kbps
Receiver Hysteresis	70 mV	70 mV	45 mV	45 mV	100 mV	75 mV	75 mV
Voltage Supply	4.5V – 5.5V	4.5V – 5.5V	4.75V – 5.25V	4.75V – 5.25V	4.5V – 5.5V	4.75V – 5.25V	4.75V – 5.25V
Operating Temperature	-40°C – 85°C	-40°C – 85°C	0°C – 70°C	-40°C – 85°C	-40°C – 85°C	0°C – 70°C	-40°C – 85°C
Package / Case	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

ISL81487LIPZ is the direct parametric equivalent and recommended primary substitute. It maintains identical electrical specifications and package configuration while offering active product status and improved availability (6,300 units in stock versus 3,900 for the obsolete ISL81483IPZ).

LTC1483IN8#PBF (Analog Devices) provides full functional compatibility with extended temperature range (-40°C – 85°C) matching the original specification. The narrower supply voltage window (4.75V – 5.25V) and lower receiver hysteresis (45 mV versus 70 mV) are within acceptable tolerance for most RS422/RS485 applications. Active product status and 865 units available.

MAX1483EPA+ (Analog Devices/Maxim Integrated) offers extended temperature range (-40°C – 85°C) with receiver hysteresis of 75 mV, closely approximating the original 70 mV specification. Supply voltage range is 4.75V – 5.25V. Active product status with 3,022 units in stock.

MAX14780EEPA+ (Analog Devices/Maxim Integrated) supports higher data rates (500 kbps) and maintains the full supply voltage range (4.5V – 5.5V) and extended temperature range (-40°C – 85°C). Receiver hysteresis is 100 mV. Suitable for applications requiring enhanced performance headroom.

LTC1483CN8#PBF is suitable only for applications with operating temperature requirements limited to 0°C – 70°C. Supply voltage range is 4.75V – 5.25V with 45 mV receiver hysteresis. 15,400 units available.

MAX1483CPA+ is suitable only for applications with operating temperature requirements limited to 0°C – 70°C. Supply voltage range is 4.75V – 5.25V with 75 mV receiver hysteresis. 2,548 units available.

All substitute parts maintain ROHS3 compliance, MSL rating of 1 (Unlimited), and through-hole 8-DIP packaging, ensuring direct PCB compatibility.

Frequently Asked Questions (FAQ)

Q: Can ISL81483IPZ be directly replaced with ISL81487LIPZ? A: Yes. ISL81487LIPZ is a parametric equivalent with identical electrical and mechanical specifications. The primary difference is product status (active versus obsolete) and packaging format (tube). Direct pin-for-pin substitution is supported.

Q: What are the key differences between Renesas and Analog Devices/Maxim substitutes? A: Renesas ISL81487LIPZ maintains identical specifications. Analog Devices LTC1483 and Maxim MAX1483 series introduce minor variations in receiver hysteresis (45–75 mV versus 70 mV) and supply voltage windows (4.75V – 5.25V versus 4.5V – 5.5V). These variations remain within acceptable RS422/RS485 operating margins for most industrial applications.

Q: Which substitute supports the full -40°C – 85°C temperature range? A: ISL81487LIPZ, LTC1483IN8#PBF, MAX14780EEPA+, and MAX1483EPA+ all support the full -40°C – 85°C industrial temperature range. LTC1483CN8#PBF and MAX1483CPA+ are limited to 0°C – 70°C.

Q: Is the 8-DIP package identical across all substitutes? A: Yes. All listed substitutes use the 8-DIP (0.300", 7.62mm) through-hole package with identical pinout and footprint compatibility. Direct PCB mounting without layout modifications is supported.

Q: What is the significance of receiver hysteresis variation? A: Receiver hysteresis determines the voltage differential required to switch receiver output states. The ISL81483IPZ specifies 70 mV. Substitutes range from 45 mV (LTC1483 series) to 100 mV (MAX14780EEPA+). Lower hysteresis improves noise immunity in marginal signal conditions; higher hysteresis reduces susceptibility to oscillation. Selection depends on signal integrity requirements in the target application.

Q: Are all substitutes RoHS3 compliant? A: Yes. All listed substitutes maintain ROHS3 compliance and MSL rating of 1 (Unlimited), meeting environmental and reliability standards for industrial deployment.

Q: Which substitute offers the highest data rate capability? A: MAX14780EEPA+ supports 500 kbps, double the 250 kbps specification of the original ISL81483IPZ. This provides performance headroom for future system upgrades while maintaining backward compatibility with 250 kbps applications.

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