TM4C1237E6PZI7 Equivalent & Substitute Parts

Part Overview

The TM4C1237E6PZI7 is an ARM Cortex-M4F Tiva C Series 32-bit microcontroller manufactured by Texas Instruments. This device integrates 128KB of FLASH program memory, 32KB of RAM, and 2KB of EEPROM in a 100-LQFP surface mount package. The microcontroller operates at 80MHz with a supply voltage range of 1.08V to 3.63V and includes integrated connectivity peripherals such as CANbus, I2C, SPI, UART/USART, and USB OTG.

The TM4C1237E6PZI7 is designated as Last Time Buy status, indicating that production has been discontinued. This status necessitates identification of equivalent substitute components to support ongoing design requirements and system maintenance.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Core Processor	ARM Cortex-M4F
Core Size	32-Bit Single-Core
Speed	80MHz
Program Memory Size	128KB (128K x 8) FLASH
RAM Size	32K x 8
EEPROM Size	2K x 8
Voltage Supply (Vcc/Vdd)	1.08V ~ 3.63V
Data Converters	A/D 22x12b
Number of I/O	69
Package / Case	100-LQFP (14x14)
Mounting Type	Surface Mount
Operating Temperature	-40°C ~ 85°C (TA)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution of the TM4C1237E6PZI7 is based on strict equivalence of the following critical parameters:

Mandatory Equivalence Parameters:

Core Processor: ARM Cortex-M4F
Core Size: 32-Bit Single-Core
Speed: 80MHz
Package / Case: 100-LQFP (14x14)
Voltage Supply Range: 1.08V ~ 3.63V
Operating Temperature: -40°C ~ 85°C (TA)
Data Converters: A/D 22x12b
Number of I/O: 69
EEPROM Size: 2K x 8
RAM Size: 32K x 8

Allowable Variation Parameters:

Program Memory Size: Substitutes with equal or greater capacity are acceptable
Connectivity Features: Substitutes may include additional connectivity options
Peripherals: Substitutes may include additional peripheral features
Product Status: Active status substitutes are preferred over Last Time Buy status
Packaging Format: Tape & Reel (TR) is functionally equivalent to Tube packaging

The TM4C123BH6PZI7R qualifies as a substitute based on these criteria, offering increased FLASH memory capacity (256KB versus 128KB) while maintaining all mandatory equivalence parameters.

Parameter Comparison

Parameter	TM4C1237E6PZI7 (Main Part)	TM4C123BH6PZI7R (Substitute)
Manufacturer	Texas Instruments	Texas Instruments
Series	Tiva C	Tiva C
Core Processor	ARM Cortex-M4F	ARM Cortex-M4F
Core Size	32-Bit Single-Core	32-Bit Single-Core
Speed	80MHz	80MHz
Program Memory Size	128KB (128K x 8) FLASH	256KB (256K x 8) FLASH
RAM Size	32K x 8	32K x 8
EEPROM Size	2K x 8	2K x 8
Voltage Supply (Vcc/Vdd)	1.08V ~ 3.63V	1.08V ~ 3.63V
Data Converters	A/D 22x12b	A/D 22x12b
Number of I/O	69	69
Package / Case	100-LQFP (14x14)	100-LQFP (14x14)
Mounting Type	Surface Mount	Surface Mount
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Product Status	Last Time Buy	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)	3 (168 Hours)

Engineering Selection Recommendations

The TM4C123BH6PZI7R is the manufacturer-recommended substitute for the TM4C1237E6PZI7. Both devices maintain identical electrical and mechanical specifications across all critical parameters, including core architecture, operating frequency, supply voltage range, I/O count, and thermal operating range.

The primary distinction is the increased FLASH program memory capacity in the substitute (256KB versus 128KB), which provides additional code storage without affecting pin compatibility, power consumption characteristics, or functional behavior. Both devices are ROHS3 compliant and carry identical moisture sensitivity ratings.

The TM4C123BH6PZI7R holds Active product status, ensuring continued availability and manufacturing support, whereas the main part is designated Last Time Buy. This status difference supports long-term supply chain continuity for new designs and production requirements.

Frequently Asked Questions (FAQ)

Q: Are the TM4C1237E6PZI7 and TM4C123BH6PZI7R pin-compatible?

A: Yes. Both devices use the 100-LQFP (14x14) package with identical pin assignments and I/O count (69 pins). No PCB layout modifications are required for substitution.

Q: What is the primary difference between these two microcontrollers?

A: The TM4C123BH6PZI7R provides 256KB of FLASH program memory compared to 128KB in the TM4C1237E6PZI7. All other specifications, including RAM, EEPROM, processor core, operating frequency, and peripheral features, remain equivalent.

Q: Can I use the TM4C123BH6PZI7R as a direct replacement in existing designs?

A: Yes. The substitute maintains identical electrical characteristics, voltage supply range (1.08V to 3.63V), operating temperature range (-40°C to 85°C), and peripheral connectivity. Existing firmware and hardware designs require no modification.

Q: What is the difference between Tube and Tape & Reel packaging?

A: Tube packaging is used for lower-volume orders and manual handling, while Tape & Reel (TR) packaging is optimized for automated assembly processes. Both packaging formats contain identical components with the same electrical and mechanical specifications.

Q: Why is the main part designated as Last Time Buy?

A: Last Time Buy status indicates that Texas Instruments has discontinued production of the TM4C1237E6PZI7. The TM4C123BH6PZI7R, with Active status, represents the current production equivalent and is recommended for all new designs and ongoing supply requirements.

Q: Are both devices RoHS3 compliant?

A: Yes. Both the TM4C1237E6PZI7 and TM4C123BH6PZI7R are ROHS3 compliant and carry identical Moisture Sensitivity Level (MSL) ratings of 3 (168 Hours).

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