LM236Z-AP Equivalent & Substitute Parts

Part Overview

The LM236Z-AP is a shunt voltage reference integrated circuit manufactured by STMicroelectronics, classified as a Power Management (PMIC) component. This device generates a fixed 2.49V output with ±2% tolerance and supports a maximum output current of 10 mA. The LM236Z-AP is packaged in a TO-92-3 through-hole configuration and operates across the temperature range of -25°C to 85°C.

The LM236Z-AP is currently listed as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure component availability, and support ongoing production requirements for applications utilizing this voltage reference topology.

Key Parameters

Parameter	Value
Reference Type	Shunt
Output Type	Fixed
Voltage - Output (Min/Fixed)	2.49V
Current - Output	10 mA
Tolerance	±2%
Current - Cathode	400 µA
Operating Temperature	-25°C ~ 85°C (TA)
Mounting Type	Through Hole
Package / Case	TO-226-3, TO-92-3 (TO-226AA) Formed Leads
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the LM236Z-AP are qualified based on the following critical parameters that determine functional equivalence:

Electrical Equivalence Criteria:

Reference Type: Shunt (all substitutes maintain shunt topology)
Output Type: Fixed (all substitutes provide fixed voltage output)
Voltage - Output: 2.49V (all substitutes match the fixed output voltage)
Current - Output: 10 mA (all substitutes support identical maximum output current)
Current - Cathode: 400 µA (all substitutes maintain identical cathode current specification)

Mechanical Equivalence Criteria:

Mounting Type: Through Hole (all substitutes use through-hole mounting)
Package / Case: TO-92-3 (all substitutes use identical TO-92-3 package)

Compliance Criteria:

RoHS Status: ROHS3 Compliant (all substitutes meet RoHS3 requirements)
REACH Status: REACH Unaffected (all substitutes maintain REACH compliance)

Tolerance Consideration: The LM236Z-AP specifies ±2% tolerance. Substitute parts with ±4% tolerance remain functionally compatible in applications where the tighter tolerance of the original part is not a design requirement. Applications requiring ±2% tolerance must use LM336BLPR-2-5, which maintains the original tolerance specification.

Temperature Range Consideration: The LM236Z-AP operates from -25°C to 85°C. All substitute parts operate from 0°C to 70°C, representing a narrower operating range. Applications requiring operation below 0°C or above 70°C cannot use these substitutes.

Parameter Comparison

Parameter	LM236Z-AP (Main)	LM336BLPR-2-5	LM336LPR-2-5	LM336Z-2.5/LFT1	LM336Z-2.5/LFT3	LM336Z-2.5/LFT7	LM336Z-2.5/NOPB
Manufacturer	STMicroelectronics	Texas Instruments	Texas Instruments	Texas Instruments	National Semiconductor	Texas Instruments	Texas Instruments
Reference Type	Shunt	Shunt	Shunt	Shunt	Shunt	Shunt	Shunt
Output Type	Fixed	Fixed	Fixed	Fixed	Fixed	Fixed	Fixed
Voltage - Output (Min/Fixed)	2.49V	2.49V	2.49V	2.49V	2.49V	2.49V	2.49V
Current - Output	10 mA	10 mA	10 mA	10 mA	10 mA	10 mA	10 mA
Tolerance	±2%	±2%	±4%	±4%	±4%	±4%	±4%
Current - Cathode	400 µA	400 µA	400 µA	400 µA	400 µA	400 µA	400 µA
Operating Temperature	-25°C ~ 85°C	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	TO-92-3	TO-92-3	TO-92-3	TO-92-3	TO-92-3	TO-92-3	TO-92-3
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	Not Specified	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitute - Tolerance-Matched Selection:

LM336BLPR-2-5 (Texas Instruments) is the primary substitute for applications requiring tolerance equivalence. This part maintains the ±2% tolerance specification of the LM236Z-AP while providing active product status and ROHS3 compliance. The LM336BLPR-2-5 is supplied in Cut Tape (CT) packaging with 1650 units in stock inventory.

Alternative Substitutes - Relaxed Tolerance Applications:

For applications where ±4% tolerance is acceptable, the following parts provide equivalent electrical and mechanical performance with active product status:

LM336LPR-2-5 (Texas Instruments, Tape & Reel packaging, 1077 units in stock)
LM336Z-2.5/LFT1 (Texas Instruments, Cut Tape packaging, 5734 units in stock)
LM336Z-2.5/LFT3 (National Semiconductor, Bulk packaging, 7460 units in stock)
LM336Z-2.5/LFT7 (Texas Instruments, Cut Tape packaging, 4963 units in stock)
LM336Z-2.5/NOPB (Texas Instruments, Bulk packaging, 44040 units in stock)

Temperature Range Limitation:

All substitute parts operate within 0°C to 70°C, which is narrower than the LM236Z-AP specification of -25°C to 85°C. Applications requiring operation outside the 0°C to 70°C range cannot use these substitutes.

Packaging and Inventory Considerations:

LM336Z-2.5/NOPB offers the highest inventory availability (44040 units) and is suitable for high-volume production requirements. LM336Z-2.5/LFT3 provides the second-highest inventory (7460 units) with bulk packaging. For tape-based assembly processes, LM336Z-2.5/LFT1 and LM336Z-2.5/LFT7 are available in Cut Tape format.

Frequently Asked Questions (FAQ)

Q: Can LM336BLPR-2-5 be used as a direct replacement for LM236Z-AP?

A: LM336BLPR-2-5 is electrically and mechanically equivalent to LM236Z-AP. Both parts maintain ±2% tolerance, 2.49V fixed output, 10 mA output current, and TO-92-3 packaging. The primary difference is the operating temperature range: LM236Z-AP operates from -25°C to 85°C, while LM336BLPR-2-5 operates from 0°C to 70°C. Direct substitution is valid for applications operating within 0°C to 70°C.

Q: What is the difference between the ±2% and ±4% tolerance variants?

A: The LM236Z-AP and LM336BLPR-2-5 specify ±2% tolerance on the 2.49V output voltage. The remaining substitute parts (LM336LPR-2-5, LM336Z-2.5/LFT1, LM336Z-2.5/LFT3, LM336Z-2.5/LFT7, LM336Z-2.5/NOPB) specify ±4% tolerance. Applications requiring tighter voltage accuracy must use the ±2% variants. Applications with relaxed tolerance requirements can use the ±4% variants.

Q: Are all substitute parts in the same TO-92-3 package?

A: Yes, all substitute parts use the TO-92-3 through-hole package with TO-226-3 case designation and formed leads. Physical dimensions and pin configurations are identical, enabling direct board-level substitution without layout modifications.

Q: What packaging options are available for the substitute parts?

A: Substitute parts are available in multiple packaging formats: Cut Tape (CT), Tape & Reel (TR), and Bulk. LM336BLPR-2-5, LM336Z-2.5/LFT1, and LM336Z-2.5/LFT7 are available in Cut Tape format. LM336LPR-2-5 is available in Tape & Reel format. LM336Z-2.5/LFT3 and LM336Z-2.5/NOPB are available in Bulk format. Selection depends on assembly process requirements and order quantities.

Q: Can I use a substitute part if my application requires operation below 0°C or above 70°C?

A: No. All substitute parts operate within 0°C to 70°C. The LM236Z-AP specifies -25°C to 85°C operation. Applications requiring operation outside the 0°C to 70°C range cannot use these substitutes. Alternative voltage reference solutions must be evaluated for extended temperature applications.

Q: Are all substitute parts RoHS3 compliant?

A: All substitute parts except LM336Z-2.5/LFT3 explicitly specify ROHS3 compliance. LM336Z-2.5/LFT3 does not include RoHS status in the provided specifications. For applications requiring RoHS3 certification, use LM336BLPR-2-5, LM336LPR-2-5, LM336Z-2.5/LFT1, LM336Z-2.5/LFT7, or LM336Z-2.5/NOPB.

Q: Which substitute part has the best inventory availability?

A: LM336Z-2.5/NOPB has the highest inventory availability with 44040 units in stock. This part is suitable for high-volume production and immediate availability requirements. LM336Z-2.5/LFT3 provides the second-highest availability with 7460 units.

Q: What is the cathode current specification, and why is it important?

A: All parts, including the LM236Z-AP and all substitutes, specify a cathode current of 400 µA. This parameter defines the minimum operating current required to maintain voltage regulation. Circuit designs must ensure adequate cathode current flow for proper voltage reference operation.

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