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Texas Instruments MM5452N/NOPB
- Part No.:
- MM5452N/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Display Drivers
- Package:
- 40-DIP (0.600", 15.24mm)
- Datasheet:
-
MM5452N/NOPB.pdf
- Description:
- IC DRVR 7 SEG 4 1/2 DIGIT 40DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,966
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Product details
Overview
MM5452N/NOPB from Texas Instruments is a monolithic CMOS LCD display driver IC in 40-pin PDIP package, designed to directly drive up to 32 segments of 4½-digit 7-segment LCDs without character generation. It supports serial data input (32-bit + start bit), operates from 3V to 10V supply, delivers ±500 µA backplane output current, and features DATA ENABLE control instead of a 33rd output pin - enabling non-multiplexed static drive for industrial digital meters and instrumentation readouts.
For engineers reviewing the MM5452N/NOPB datasheet, MM5452N/NOPB pinout, MM5452N/NOPB application, or MM5452N/NOPB equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternatives for LCD driver migration, and supply support for legacy industrial display systems requiring long-term component continuity.
Technical Context
The MM5452N/NOPB implements a static master-slave shift register with synchronous LOAD/RESET generation at the 36th clock edge, latching 32 data bits after a leading "1" start bit. Its internal oscillator (RC-timed, ~75 Hz backplane frequency) or external clock input (up to 1 MHz, 40–60% duty cycle) drives segment and backplane outputs independently.
It uses TTL-compatible inputs, supports cascaded operation for expanded segment count, and maintains segment data in latches until new serial data arrives - eliminating need for continuous clocking or external load signals. Output offset voltage is tightly controlled at ±50 mV under specified capacitive loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3 V to 10 V - enables direct compatibility with 5 V and 9 V industrial power rails without regulation. |
| Segment Outputs | 32 outputs - sufficient to drive full 4½-digit 7-segment + decimal point + sign/mode indicators. |
| Backplane Sink/Source Current | −500 µA / +500 µA - ensures reliable LCD contrast across wide temperature range (−40°C to +85°C). |
| Input Logic Thresholds | VIL ≤ 0.8 V, VIH ≥ 2.0 V (at VDD = 5 V) - guarantees noise-immune interface with microcontroller GPIOs. |
| Max Clock Frequency | 1.0 MHz (at VDD = 10 V) - allows fast update rates for dynamic displays without timing bottlenecks. |
| Backplane Output Frequency | 75 Hz (with ROSC_IN = 50 kΩ, COSC_IN = 0.01 µF) - matches standard LCD AC drive requirements to prevent electrolysis. |
| Average Supply Current | 40 µA at VDD = 10 V - enables ultra-low-power operation in battery-backed instrumentation. |
Pinout & Package
MM5452N/NOPB is housed in a 40-pin Plastic Dual Inline Package (PDIP) per TI package drawing NFJ0040A, with 0.6-inch body width and 0.1-inch lead pitch. Pin 1 is marked by notch or dot; leads are tin-lead (CU SN) finish, RoHS-compliant (Green), MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Positive Power Supply | Accepts 3–10 V DC; powers all internal logic and output drivers. |
| VSS | Ground Reference | Common return for logic, segment, and backplane circuits. |
| DATA | Serial Data Input | Accepts MSB-first stream: start bit "1", then 32 segment bits. |
| CLOCK | Serial Clock Input | Drives internal shift register; rising edge clocks data, 36th edge triggers LOAD/RESET. |
| DATA ENABLE | Output Enable Control | Active-high signal enabling segment outputs; replaces 33rd output used in MM5453. |
| BP_OUT | Backplane Output | Drives common LCD backplane electrode with ±500 µA capability at 75 Hz. |
| SEG1–SEG32 | Segment Outputs | Direct-drive outputs mapped to individual LCD segment electrodes; no external drivers needed. |
| ROSC_IN / COSC_IN | Oscillator Timing Inputs | Connect external RC network (e.g., 50 kΩ + 0.01 µF) to set backplane frequency. |
Key Features
| Feature | Design Value |
|---|---|
| No Load Signal Required | Internal LOAD generated synchronously on 36th clock edge eliminates need for external strobe or control line. |
| Alphanumeric & Bar Graph Capability | All 32 outputs individually controllable - supports custom glyphs, bar graphs, and status indicators beyond numeric digits. |
| Cascaded Operation | Multiple MM5452N/NOPB devices can be daisy-chained via DATA OUT (pin 18) to drive >32 segments without added logic. |
| Wide Supply Range (3–10 V) | Eliminates level-shifting circuitry when interfacing with 3.3 V MCUs or 9 V battery-powered instruments. |
| TTL-Compatible Inputs | Direct connection to legacy microcontrollers (e.g., 8051, Z80) without buffer ICs or resistor networks. |
Applications
| Digital Multimeter Display | Industrial Panel Meter |
|---|---|
Use Scenario: Driving 4½-digit LCD in handheld DMM with auto-ranging and hold functions. IC Role / Device Role / Timing Role: Static segment driver receiving serial BCD-coded digit data from MCU; generates synchronized backplane waveform. Use Value: Eliminates character generator IC and external multiplexing logic, reducing BOM count and PCB area by >30%. |
Use Scenario: Front-panel LCD readout in DIN-rail mounted PLC I/O module operating at −40°C to +85°C. IC Role / Device Role / Timing Role: Primary display controller handling serial updates from RS-485 host; maintains display state during comms interruptions. Use Value: Latched outputs retain display content without refresh, ensuring visibility during transient power dips or firmware reboots. |
| Digital Thermometer | Remote Sensor Display Unit |
Use Scenario: Battery-powered indoor/outdoor thermometer with dual-display capability and low-power sleep mode. IC Role / Device Role / Timing Role: Low-current LCD driver activated only during periodic wake-up intervals; draws just 40 µA at 10 V. Use Value: Extends CR2032 battery life to >2 years by minimizing active current and supporting deep-sleep retention. |
Use Scenario: Four-wire remote display connected over 10 m twisted pair to analog sensor node. IC Role / Device Role / Timing Role: Serial-to-LCD interface converting staircase-comparator output bits into segment states. Use Value: Reduces wiring complexity from 32+ analog lines to 4 wires (VDD, GND, DATA, CLOCK), cutting installation cost and EMI susceptibility. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LCD driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MM5453N/NOPB | Replaces DATA ENABLE pin with 33rd segment output; identical timing, drive strength, and pinout except pin 18 function. | Required when 33rd segment (e.g., colon, auxiliary indicator) is needed instead of enable control. | Select MM5453N/NOPB only if the design requires the extra segment output and does not use DATA ENABLE logic. |
| ICM7211AMIW | 4-digit BCD-to-7-segment decoder with built-in multiplexing; 28-pin SOIC; requires external backplane oscillator. | Designed for fixed-configuration 4-digit numeric displays; lacks alphanumeric flexibility and serial interface. | Choose ICM7211AMIW for cost-sensitive, fixed-format meters where MCU resources are constrained and character generation is unnecessary. |
Compared with MM5452N/NOPB, MM5453N/NOPB offers one additional segment output at the expense of DATA ENABLE control, while ICM7211AMIW trades serial programmability and 32-output flexibility for integrated BCD decoding and lower pin count - making each suitable for distinct display architecture priorities.
Availability
MM5452N/NOPB is available at Aetrix Electronics and suitable for industrial panel meters, digital multimeters, and remote sensor displays requiring stable component supply amid TI's LIFEBUY status.
Supply support for MM5452N/NOPB includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor company founded in 1930, specializing in analog, embedded processing, and high-reliability ICs for industrial, automotive, and instrumentation markets.
The MM5452N/NOPB belongs to TI's legacy LCD driver product line, engineered specifically for low-power, static-drive LCD interfaces in measurement and control equipment where long-term reliability and minimal external components are critical.
FAQ
What is the primary function of the MM5452N/NOPB in an LCD system?
The MM5452N/NOPB serves as a serial-input static LCD segment driver, accepting 32-bit display data plus a start bit via DATA and CLOCK pins, then directly driving up to 32 LCD segments and one backplane electrode. It latches data internally and holds segment states until updated - eliminating need for continuous MCU intervention or external memory. This makes MM5452N/NOPB ideal for instrumentation displays where stability and low firmware overhead are essential.
Does the MM5452N/NOPB require an external character generator?
No, the MM5452N/NOPB does not include a character generator. Segment mapping must be performed externally - the host MCU or controller formats raw segment-on/segment-off bits before sending them serially to MM5452N/NOPB. This gives full flexibility for custom symbols, bar graphs, or alphanumeric layouts but shifts formatting responsibility to the system processor. The MM5452N/NOPB itself only interprets and drives the 32 received bits.
Can the MM5452N/NOPB operate with an external clock source?
Yes, the MM5452N/NOPB supports external clocking: tie ROSC_IN and COSC_IN to ground and apply a square wave (40–60% duty cycle) to the CLOCK pin. At VDD = 10 V, it accepts up to 1 MHz; at VDD = 5 V, up to 750 kHz. External clocking enables synchronization with AC line frequency or DVM integration periods to suppress display flicker and measurement interference - a key advantage in precision instruments using MM5452N/NOPB.
What is the purpose of the DATA ENABLE pin on the MM5452N/NOPB?
The DATA ENABLE pin on MM5452N/NOPB is an active-high output enable that gates all 32 segment outputs. When low, segment drivers are disabled (high-impedance); when high, they reflect the latched data. This replaces the 33rd segment output found on the pin-compatible MM5453N/NOPB. In designs needing an extra segment, MM5453N/NOPB is used instead - confirming that DATA ENABLE is a functional differentiator, not a spare pin, in MM5452N/NOPB.
Is the MM5452N/NOPB suitable for battery-powered applications?
Yes, the MM5452N/NOPB is well-suited for battery-powered applications due to its ultra-low quiescent current: only 40 µA typical at VDD = 10 V with all outputs open and clock/idle conditions. Combined with its ability to retain display data in latches without refresh, it enables extended operation on coin cells or alkaline batteries - especially in intermittent-readout devices like thermometers or portable testers where MM5452N/NOPB drives the LCD only during active measurement cycles.
MM5452N/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- COPS™
- Package/Case:
- 40-DIP (0.600", 15.24mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Display Type:
- LCD
- Configuration:
- 7 Segment + DP, Alphanumeric and Bar Graph
- Interface:
- Serial
- Digits or Characters:
- 4.5 Digits
- Current - Supply:
- -
- Voltage - Supply:
- 3V ~ 10V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 40-DIP
MM5452N/NOPB FAQ
1.How can I place an order for MM5452N/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for MM5452N/NOPB on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MM5452N/NOPB reliable?
The price and inventory of MM5452N/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MM5452N/NOPB is usually 5 days.
3.What payment methods are accepted for MM5452N/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MM5452N/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MM5452N/NOPB?
MM5452N/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MM5452N/NOPB order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MM5452N/NOPB?
For technical support, including MM5452N/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MM5452N/NOPB requirements.
6.How does Aetrix verify that MM5452N/NOPB is sourced from the original manufacturer or authorized distributors?
All MM5452N/NOPB products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MM5452N/NOPB meets industry standards.
7.What is the process for return or replacement of MM5452N/NOPB?
All MM5452N/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with MM5452N/NOPB, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MM5452N/NOPB part is unused and in its original packaging.
Return procedure for MM5452N/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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