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Texas Instruments MM5452V/NOPB
- Part No.:
- MM5452V/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Display Drivers
- Package:
- 44-LCC (J-Lead)
- Datasheet:
-
MM5452V/NOPB.pdf
- Description:
- IC DRVR 7 SEG 4 1/2 DIGIT 44PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,718
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Product details
Overview
MM5452V/NOPB from Texas Instruments is a monolithic CMOS LCD segment driver IC in 44-pin PLCC package, capable of driving up to 32 LCD segments with serial data input, no load signal required, and wide 3V–10V supply operation. It supports 4½-digit 7-segment displays, alphanumeric and bar-graph configurations, and cascaded operation for expanded display capacity in instrumentation readouts.
For engineers reviewing the MM5452V/NOPB datasheet, MM5452V/NOPB pinout, MM5452V/NOPB application, or MM5452V/NOPB equivalent, key selection considerations include its 32-output static latch architecture, TTL-compatible serial interface, backplane frequency generation via external RC network, and −40°C to +85°C industrial temperature range.
Technical Context
The MM5452V/NOPB implements a static master-slave shift register with 32-bit serial input (plus start bit), latching data on the 36th clock edge to drive outputs directly-no multiplexing. Its DATA ENABLE pin replaces the 33rd output found on the MM5453 variant, enabling non-multiplexed segment control without external load strobes.
It generates internal backplane waveform using an external RC oscillator (ROSC_IN/COSC_IN), delivering ~75 Hz at nominal 50 kΩ/0.01 µF; backplane sink/source current reaches ±500 µA at VDD = 3V, while segment drive capability is ±40 µA under same conditions-sufficient for low-power reflective LCDs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3V to 10V - supports direct battery or unregulated rail operation without LDO |
| Operating Temperature | −40°C to +85°C - qualified for industrial embedded instrumentation environments |
| Segment Output Count | 32 outputs - drives full 4½-digit 7-segment display plus decimal points and signs |
| Backplane Frequency | 75 Hz (typ.) - matches standard LCD AC bias requirements to prevent electrolysis |
| Input Clock Max Frequency | 1.0 MHz at VDD = 10V - enables fast update rates for dynamic displays |
| Average Supply Current | 40 µA at VDD = 10V - ultra-low quiescent power ideal for battery-powered meters |
| Output Drive Capability | ±500 µA backplane, ±40 µA segment - sufficient for high-impedance passive LCD glass |
Pinout & Package
MM5452V/NOPB uses a 44-pin Plastic Leaded Chip Carrier (PLCC) package per TI package code FN0044A, with 4.57 mm max height and J-lead configuration. Pin 1 is marked by optional corner chamfer or dot; seating plane defines mechanical reference.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Positive Supply | 3V–10V main power rail; decoupling capacitor required near pin |
| VSS | Ground Reference | System ground return for logic and analog sections |
| DATA | Serial Data Input | CMOS/TTL-compatible input accepting start bit + 32 data bits |
| CLOCK | Serial Clock Input | Edge-triggered clock; 50% duty cycle recommended for stable latching |
| DATA ENABLE | Latch Control Enable | Active-high signal enabling data transfer into output latches |
| BP_OUT | Backplane Output | Drives common electrode of LCD; sinks/sources ±500 µA at VDD = 3V |
| SEG1–SEG32 | Segment Outputs | Individually controllable segment drivers; each sinks/sources ±40 µA |
| ROSC_IN / COSC_IN | Oscillator Timing Inputs | Accept external RC network (e.g., 50 kΩ + 0.01 µF) to set BP frequency |
Key Features
| Feature | Design Value |
|---|---|
| No Load Signal Required | Internal LOAD generated synchronously on 36th clock edge eliminates need for external strobe control logic |
| Serial Data Interface | 2-wire (DATA + CLOCK) reduces interconnect count and PCB routing complexity for remote displays |
| Cascaded Operation Support | Multiple MM5452V/NOPB devices can be daisy-chained to drive >32 segments without additional controllers |
| Alphanumeric & Bar Graph Ready | All 32 outputs are individually addressable-supports custom character maps and linear analog bar indicators |
| Wide Supply Range | Operates from 3V (single-cell Li-ion or alkaline) to 10V (industrial rails), eliminating level-shifting circuitry |
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: Primary segment driver receiving serial BCD data from microcontroller; provides static segment voltage bias synchronized to internal backplane oscillator. Use Value: Eliminates need for parallel bus interface and external latch, reducing MCU GPIO count and PCB footprint. |
Use Scenario: Front-panel readout in DIN-rail mounted process controller displaying temperature, pressure, or flow rate. IC Role / Device Role / Timing Role: Standalone display driver handling serial updates from RS-485-connected host; maintains display during communication gaps via internal latches. Use Value: Enables reliable local display without real-time CPU polling, improving system responsiveness and reducing firmware overhead. |
| Digital Clock/Thermometer | Remote Sensor Display Unit |
Use Scenario: Battery-powered wall clock or indoor/outdoor thermometer with 7-segment LCD. IC Role / Device Role / Timing Role: Low-power segment driver operating from 3V coin cell; backplane frequency set to 75 Hz to minimize LCD degradation. Use Value: 40 µA typical supply current at 10V (scaling lower at 3V) extends battery life beyond 5 years in intermittent-update mode. |
Use Scenario: Four-wire remote display linked to analog sensor node over twisted-pair cable. IC Role / Device Role / Timing Role: Serial-to-LCD translator converting staircase-comparator output bits into segment states; immune to EMI due to differential clock/data timing. Use Value: Replaces parallel wiring with two signal lines plus power/ground, cutting cable cost and noise susceptibility in factory environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LCD segment driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MM5453V/NOPB | 33rd output pin instead of DATA ENABLE; identical timing, drive strength, and package | Required when 33rd segment or auxiliary control signal needed; not pin-compatible with MM5452V/NOPB | Select MM5453V/NOPB only if the extra output is utilized; otherwise MM5452V/NOPB offers simpler control interface |
| ICM7211AMIPI | 4-digit BCD-to-7-segment decoder with built-in multiplexing; requires parallel input, not serial | Designed for fixed-format numeric displays; lacks alphanumeric flexibility and serial interface of MM5452V/NOPB | Choose ICM7211AMIPI for cost-sensitive, fixed-numeric applications where microcontroller has parallel port available |
Compared with MM5453V/NOPB, MM5452V/NOPB trades one output for simplified serial control via DATA ENABLE; versus ICM7211AMIPI, it sacrifices integrated decoding for greater display format flexibility and reduced MCU interface burden.
Availability
MM5452V/NOPB is available at Aetrix Electronics and suitable for digital multimeters, industrial panel meters, and remote sensor displays requiring stable component supply across extended product lifecycles.
Supply support for MM5452V/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 leader founded in 1930, specializing in analog, embedded processing, and high-reliability components for industrial, automotive, and consumer systems.
The MM5452V/NOPB belongs to TI's legacy LCD driver product line, designed specifically for low-power, serial-interface-driven passive segment LCDs in instrumentation and portable measurement equipment.
FAQ
What is the primary function of the MM5452V/NOPB in an LCD system?
The MM5452V/NOPB serves as a serial-input LCD segment driver that converts 32-bit serial data into static DC-biased segment voltages for passive matrix LCDs. It internally generates the required backplane waveform and holds display data in latches-eliminating continuous MCU refresh. The MM5452V/NOPB is optimized for 4½-digit 7-segment displays but supports custom alphanumeric and bar-graph layouts through direct segment control.
Does the MM5452V/NOPB require an external load signal to update the display?
No, the MM5452V/NOPB does not require an external load signal. It generates an internal LOAD pulse synchronously on the 36th clock edge after detecting the leading "1" start bit followed by 32 data bits. This automatic latching mechanism simplifies system design by removing the need for additional control lines or timing coordination from the host microcontroller-making the MM5452V/NOPB especially suitable for resource-constrained or low-pin-count MCU implementations.
What package type and pin count does the MM5452V/NOPB use?
The MM5452V/NOPB is packaged in a 44-pin Plastic Leaded Chip Carrier (PLCC) with J-leads, per TI package code FN0044A. Its mechanical outline specifies 4.57 mm maximum height, 16.2 mm × 16.2 mm body size, and pin 1 identification via corner chamfer or dot. This surface-mount package supports reflow soldering and is compatible with standard PLCC footprints used in industrial instrumentation PCBs.
Can the MM5452V/NOPB drive both numeric and bar-graph LCD displays?
Yes, the MM5452V/NOPB can drive both numeric and bar-graph LCD displays because all 32 outputs are individually controllable and not hardwired to fixed segment patterns. Unlike character-generator-based drivers, the MM5452V/NOPB accepts raw bit-mapped data-enabling custom digit layouts, multi-segment bars, status indicators, or mixed alphanumeric content. This flexibility makes the MM5452V/NOPB appropriate for analog meter bar graphs, spectrum analyzers, and tuning indicators described in TI's application notes.
What is the recommended backplane frequency setting for the MM5452V/NOPB?
The MM5452V/NOPB achieves a typical backplane frequency of 75 Hz using a 50 kΩ resistor and 0.01 µF capacitor on ROSC_IN/COSC_IN pins. TI specifies this RC combination produces a frequency within the 30 Hz–150 Hz range suitable for most passive LCD glass. Deviations outside this range risk increased flicker or accelerated LCD degradation; the MM5452V/NOPB's internal oscillator tolerances allow ±20% variation depending on component accuracy and temperature drift.
MM5452V/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- COPS™
- Package/Case:
- 44-LCC (J-Lead)
- 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:
- Surface Mount
- Supplier Device Package:
- 44-PLCC (16.58x16.58)
MM5452V/NOPB FAQ
1.How can I place an order for MM5452V/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for MM5452V/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 MM5452V/NOPB reliable?
The price and inventory of MM5452V/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MM5452V/NOPB is usually 5 days.
3.What payment methods are accepted for MM5452V/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MM5452V/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MM5452V/NOPB?
MM5452V/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MM5452V/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 MM5452V/NOPB?
For technical support, including MM5452V/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MM5452V/NOPB requirements.
6.How does Aetrix verify that MM5452V/NOPB is sourced from the original manufacturer or authorized distributors?
All MM5452V/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 MM5452V/NOPB meets industry standards.
7.What is the process for return or replacement of MM5452V/NOPB?
All MM5452V/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with MM5452V/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 MM5452V/NOPB part is unused and in its original packaging.
Return procedure for MM5452V/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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