TM4C1237D5PZI7R Equivalent & Substitute Parts

Part Overview

The TM4C1237D5PZI7R is an ARM Cortex-M4F Tiva C microcontroller manufactured by Texas Instruments, featuring 32-bit single-core architecture operating at 80MHz with 64KB FLASH memory. This device is classified as Last Time Buy, indicating end-of-life status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain flexibility, and support long-term product availability for applications requiring compatible ARM Cortex-M4F microcontrollers in the Tiva C series.

Key Parameters

Parameter	Value
Manufacturer Part Number	TM4C1237D5PZI7R
Manufacturer	Texas Instruments
Series	Tiva C
Core Processor	ARM Cortex-M4F
Core Size	32-Bit Single-Core
Speed	80MHz
Program Memory Size	64KB (64K x 8) FLASH
RAM Size	24K x 8
EEPROM Size	2K x 8
Voltage Supply (Vcc/Vdd)	1.08V ~ 3.63V
Number of I/O	69
Package / Case	100-LQFP (14x14)
Mounting Type	Surface Mount
Operating Temperature	-40°C ~ 85°C (TA)
Product Status	Last Time Buy
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the TM4C1237D5PZI7R is based on strict alignment of the following critical parameters:

Core processor architecture: ARM Cortex-M4F
Operating frequency: 80MHz
Package type: 100-LQFP (14x14)
Voltage supply range: 1.08V ~ 3.63V
Number of I/O pins: 69
Mounting type: Surface Mount
Operating temperature range: -40°C ~ 85°C
Series family: Tiva C

The TM4C123BH6PZI7R qualifies as a manufacturer-recommended substitute. While it features increased program memory (256KB versus 64KB) and expanded RAM (32K x 8 versus 24K x 8), it maintains identical core architecture, clock speed, package configuration, electrical specifications, and pin count. These memory enhancements represent functional improvements without introducing incompatibility.

Parameter Comparison

Parameter	TM4C1237D5PZI7R (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	64KB (64K x 8) FLASH	256KB (256K x 8) FLASH
RAM Size	24K 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
Number of I/O	69	69
Data Converters	A/D 22x12b	A/D 22x12b
Oscillator Type	Internal	Internal
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Package / Case	100-LQFP (14x14)	100-LQFP (14x14)
Mounting Type	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)	3 (168 Hours)
Product Status	Last Time Buy	Active

Engineering Selection Recommendations

The TM4C123BH6PZI7R is the manufacturer-recommended substitute for the TM4C1237D5PZI7R. Selection of the substitute part is supported by the following factors:

Identical core processor architecture and operating frequency ensure software compatibility and functional equivalence
Matching package configuration (100-LQFP 14x14) and pin count (69 I/O) enable direct PCB layout compatibility
Identical voltage supply range and operating temperature specifications maintain electrical and thermal compatibility
Active product status of the substitute part ensures ongoing availability and supply chain continuity, addressing the Last Time Buy status of the main part
Increased program memory and RAM in the substitute part provide functional enhancement without introducing design constraints
Both parts maintain ROHS3 compliance and identical moisture sensitivity ratings

Frequently Asked Questions (FAQ)

Q: Can the TM4C123BH6PZI7R be used as a direct replacement for the TM4C1237D5PZI7R?

A: Yes. Both devices share identical core processor architecture (ARM Cortex-M4F), operating frequency (80MHz), package type (100-LQFP 14x14), pin count (69 I/O), voltage supply range (1.08V ~ 3.63V), and operating temperature range (-40°C ~ 85°C). The substitute part features increased program memory (256KB versus 64KB) and RAM (32K x 8 versus 24K x 8), which represent functional improvements without introducing incompatibility.

Q: Are there any pin compatibility concerns between these parts?

A: No. Both parts use the 100-LQFP (14x14) package with 69 I/O pins. Pin configuration and electrical characteristics are identical, enabling direct PCB layout compatibility without modification.

Q: What is the difference in memory between these two parts?

A: The TM4C1237D5PZI7R provides 64KB FLASH and 24K x 8 RAM. The TM4C123BH6PZI7R provides 256KB FLASH and 32K x 8 RAM. The increased memory in the substitute part does not create compatibility issues and supports applications requiring larger code or data storage.

Q: Why is the TM4C1237D5PZI7R marked as Last Time Buy?

A: Last Time Buy status indicates end-of-life classification. The TM4C123BH6PZI7R maintains Active product status, ensuring continued availability and long-term supply chain support.

Q: Are both parts RoHS compliant?

A: Yes. Both the TM4C1237D5PZI7R and TM4C123BH6PZI7R are ROHS3 compliant with identical moisture sensitivity levels (MSL 3, 168 Hours).

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