ISL43112IBZ Equivalent & Substitute Parts

Part Overview

The ISL43112IBZ is a single-circuit SPST-NO (Single Pole Single Throw - Normally Open) analog switch manufactured by Renesas Electronics Corporation. This interface component features a 20Ohm on-state resistance and is housed in an 8-SOIC package. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. Substitute parts must maintain electrical compatibility across switching characteristics, voltage ratings, and thermal operating ranges while accommodating different packaging formats and manufacturer specifications.

Key Parameters

Parameter	ISL43112IBZ
Switch Circuit Type	SPST - NO
Multiplexer/Demultiplexer Circuit	1:1
Number of Circuits	1
On-State Resistance (Max)	20Ohm
Voltage - Supply, Dual (V±)	±1.5V ~ 6V
Switch Time - Ton (Max)	70ns
Switch Time - Toff (Max)	45ns
Charge Injection	7pC
Channel Capacitance - CS(off)	13pF
Channel Capacitance - CD(off)	13pF
Current - Leakage (IS(off)) (Max)	1nA
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the ISL43112IBZ is determined by the following critical parameters:

Mandatory Matching Parameters:

Switch Circuit Type: SPST - NO
Multiplexer/Demultiplexer Circuit: 1:1
Number of Circuits: 1
On-State Resistance (Max): 20Ohm
Dual Supply Voltage Range: Must support ±1.5V ~ 6V or broader range
Operating Temperature: Must support -40°C ~ 85°C minimum
RoHS3 Compliance: Required for regulatory alignment

Flexible Parameters (Allowable Variation):

Package format (8-SOIC, 5-SOT acceptable for different board layouts)
Switch timing characteristics (Ton, Toff) within acceptable performance windows
Charge injection and capacitance values (minor variations acceptable)
Leakage current (up to 5nA acceptable)
Moisture Sensitivity Level (MSL 1 or MSL 3 acceptable)

All four substitute parts meet the mandatory electrical and functional requirements while offering active product status and improved availability compared to the obsolete ISL43112IBZ.

Parameter Comparison

Parameter	ISL43112IBZ	ISL43112IHZ-T	MAX4516CSA+	TS12A4516D	TS12A4516DR
Manufacturer	Renesas	Renesas	Analog Devices/Maxim	Texas Instruments	Texas Instruments
Product Status	Obsolete	Active	Active	Active	Active
Switch Circuit	SPST - NO	SPST - NO	SPST - NO	SPST - NO	SPST - NO
Multiplexer/Demultiplexer	1:1	1:1	1:1	1:1	1:1
Number of Circuits	1	1	1	1	1
On-State Resistance (Max)	20Ohm	20Ohm	20Ohm	20Ohm	20Ohm
Voltage - Supply, Dual (V±)	±1.5V ~ 6V	±1.5V ~ 6V	±1V ~ 6V	±1V ~ 6V	±1V ~ 6V
Switch Time - Ton (Max)	70ns	70ns	100ns	75ns	75ns
Switch Time - Toff (Max)	45ns	45ns	75ns	45ns	45ns
Charge Injection	7pC	7pC	10pC	-13pC	-13pC
Channel Capacitance - CS(off)	13pF	13pF	9pF	5.5pF	5.5pF
Channel Capacitance - CD(off)	13pF	13pF	9pF	5.5pF	5.5pF
Current - Leakage (IS(off)) (Max)	1nA	1nA	1nA	5nA	5nA
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	8-SOIC	5-SOT	8-SOIC	8-SOIC	8-SOIC
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	MSL 1	MSL 3	MSL 1	MSL 1	MSL 1
Inventory Status	971 Pcs	3200 Pcs	1202 Pcs	1650 Pcs	1550 Pcs

Engineering Selection Recommendations

ISL43112IHZ-T (Renesas, Active) This part is the direct Renesas equivalent with identical electrical specifications and operating temperature range. It differs only in package format (5-SOT versus 8-SOIC) and has higher inventory availability (3200 units). Selection is appropriate for designs where the smaller 5-SOT footprint is acceptable. MSL 3 rating requires controlled storage conditions (168 hours maximum at 85°C/85% RH).

MAX4516CSA+ (Analog Devices/Maxim, Active) This part maintains 8-SOIC package compatibility and identical on-state resistance. It supports a broader single-supply voltage range (2V ~ 12V) and dual-supply range (±1V ~ 6V). Operating temperature range is limited to 0°C ~ 70°C, making it unsuitable for applications requiring -40°C operation. Selection is appropriate for commercial-grade applications with relaxed temperature requirements.

TS12A4516D and TS12A4516DR (Texas Instruments, Active) Both Texas Instruments parts are functionally identical with 8-SOIC package compatibility. They feature superior performance characteristics including lower channel capacitance (5.5pF versus 13pF), higher bandwidth (464MHz), and negative charge injection (-13pC). Operating temperature range matches the original (-40°C ~ 85°C). The primary difference is packaging: TS12A4516D is supplied in tubes, while TS12A4516DR is supplied in tape and reel format. Leakage current is slightly elevated at 5nA maximum. Selection is appropriate for high-frequency applications and industrial temperature environments.

Frequently Asked Questions (FAQ)

Q: Can I use ISL43112IHZ-T as a direct replacement for ISL43112IBZ? A: Electrically yes, with package consideration. The ISL43112IHZ-T has identical electrical specifications and operating temperature range but uses a 5-SOT package instead of 8-SOIC. Board layout redesign is required. MSL 3 rating requires controlled storage conditions during manufacturing.

Q: What is the key difference between TS12A4516D and TS12A4516DR? A: Both parts are electrically identical. The difference is packaging format: TS12A4516D is supplied in tubes, while TS12A4516DR is supplied in tape and reel format. Selection depends on assembly line requirements and volume handling.

Q: Is MAX4516CSA+ suitable for industrial temperature applications? A: No. The MAX4516CSA+ operates from 0°C to 70°C, which does not meet the -40°C to 85°C industrial temperature range of the original ISL43112IBZ. It is suitable only for commercial-grade applications.

Q: Which substitute part has the best high-frequency performance? A: The Texas Instruments parts (TS12A4516D and TS12A4516DR) offer superior high-frequency characteristics with 464MHz bandwidth and lower channel capacitance (5.5pF), compared to 13pF in the original design.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All four substitute parts are ROHS3 compliant and REACH unaffected, matching the regulatory status of the original ISL43112IBZ.

Q: What is the impact of MSL 3 rating on ISL43112IHZ-T? A: MSL 3 rating limits storage at 85°C and 85% relative humidity to 168 hours maximum. After this period, the component requires baking at 125°C for 24 hours before use. MSL 1 parts (all others) have unlimited storage life under standard conditions.

Q: Can I use these parts interchangeably in the same PCB design? A: ISL43112IHZ-T requires PCB layout changes due to different package (5-SOT). MAX4516CSA+, TS12A4516D, and TS12A4516DR are pin-compatible with 8-SOIC packages and can use identical PCB layouts. Electrical parameter differences should be evaluated for specific application requirements.

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