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Texas Instruments MM5452V
- Part No.:
- MM5452V
- Manufacturer:
- Texas Instruments
- Category:
- Display Drivers
- Package:
- 44-LCC (J-Lead)
- Datasheet:
-
MM5452V.pdf
- Description:
- IC DRVR 7 SEG 4 1/2 DIGIT 44PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,610
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Product details
Overview
MM5452V from Texas Instruments is a monolithic CMOS LCD display driver IC designed for direct segment drive of 4½-digit 7-segment displays. It provides 32 segment outputs plus DATA ENABLE (no 33rd output), operates from 3V to 10V supply, supports serial data input with no external load signal, and delivers ±50 mV segment/backplane output offset voltage at up to 1 MHz clock frequency - used in digital voltmeters, thermometers, and industrial control indicators.
For engineers reviewing the MM5452V datasheet, MM5452V pinout, MM5452V application, or MM5452V equivalent, this page delivers verified package mapping (PLCC-44 FN0044A), confirmed pin 20 data bit alignment, TTL-compatible serial interface timing, backplane frequency control via external RC oscillator, and real-world cascading capability for expanded digit count.
Technical Context
The MM5452V implements static master-slave shift registers with synchronous LOAD/RESET generation on the 36th clock edge, enabling non-multiplexed direct drive without external latching. Its DATA ENABLE function replaces the 33rd output found on the MM5453V variant, making it distinct in functional configuration.
It accepts serial data with leading "1" start bit followed by 32 segment bits, requires no separate load signal, and supports external clock synchronization (50% duty cycle) to suppress LCD interference - critical for DVM integration time alignment and AC-powered remote displays.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3V to 10V - enables operation from single Li-ion or multi-cell alkaline supplies without regulation. |
| Segment Outputs | 32 outputs + DATA ENABLE - drives full 4½-digit 7-segment display with decimal points and sign, no character generator required. |
| Max Clock Frequency | 1.0 MHz at VDD = 10V - supports fast update rates up to ~27.8 kHz display refresh (36 clocks per frame). |
| Backplane Output Freq | 75 Hz (ROSC_IN = 50 kΩ, COSC_IN = 0.01 µF) - matches standard LCD AC drive requirements to prevent electrolysis. |
| Input Logic Compatibility | TTL-compatible VIH/VIL thresholds - interfaces directly with microcontrollers and logic families without level-shifting. |
| Segment Sink Current | −40 µA at VDD = 3V, VOUT = 0.3V - sufficient for low-power reflective LCDs with typical 250 pF loading. |
| Operating Temperature | −40°C to +85°C - qualified for industrial environments including panel-mounted instrumentation and remote displays. |
Pinout & Package
MM5452V is housed in a 44-pin PLCC package (JEDEC MS-018, TI package drawing FN0044A), with 4.57 mm maximum height, gull-wing leads, and pin 1 marked by corner notch or dot. The package supports reflow soldering per JEDEC Level-3 (245°C peak, 168 hr floor life).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Positive Supply | Primary power input; must be decoupled locally to suppress switching noise on LCD segments. |
| VSS | Ground Reference | Common return for all logic and analog sections; separate ground plane recommended for noise-sensitive LCD drive. |
| DATA | Serial Data Input | MSB-first stream with leading "1" start bit; sampled on rising clock edge; no internal pull-up/down. |
| CLOCK | Serial Clock Input | Rising-edge triggered; max 1 MHz at 10V; duty cycle must be 40–60% to avoid LCD DC offset. |
| DATA ENABLE | Output Enable Control | Active-high signal enabling segment outputs; replaces 33rd output present on MM5453V. |
| BP_OUT | Backplane Output | Drives common LCD backplane electrode; sink/source current up to ±500 µA at 3V. |
| OSC_IN | Oscillator Input | Accepts external RC network (e.g., 50 kΩ + 0.01 µF) to generate internal 75 Hz backplane clock. |
| PIN 20 | Data Bit 1 Output | First segment data bit (bit 1) appears on pin 20 - confirmed for MM5452V/MM5453V per datasheet Figure 7. |
Key Features
| Feature | Design Value |
|---|---|
| No Load Signal Required | 36-clock serial protocol auto-generates synchronous LOAD/RESET - eliminates external control lines and simplifies MCU firmware. |
| Cascaded Operation | Multiple MM5452V units can be daisy-chained using shared CLOCK and DATA lines with individual DATA ENABLE - scales to >32 segments without bus contention. |
| Alphanumeric & Bar Graph Support | All 32 outputs are individually controllable - enables custom segment mapping for letters, symbols, or linear bar graphs beyond numeric digits. |
| Wide Supply Range | 3V–10V operation allows direct battery interface (e.g., 3×AA = 4.5V, 9V battery = 9V) without LDO - reduces BOM count and power loss. |
| External Clock Synchronization | Accepts external 50% duty-cycle clock on CLOCK pin - enables interference-free display drive synchronized to AC line or DVM integration period. |
Applications
| Digital Voltmeter (DVM) | Industrial Panel Meter |
|---|---|
|
Use Scenario: High-precision benchtop or handheld DVM displaying 4½-digit measurements with autoranging and hold functions. IC Role / Device Role / Timing Role: Direct segment driver receiving serialized digit/segment data from ADC controller; generates synchronized backplane waveform. Use Value: Eliminates need for external latch or character ROM; 75 Hz backplane frequency suppresses 50/60 Hz mains-induced LCD flicker during integration cycles. |
Use Scenario: DIN-rail mounted process monitor showing temperature, pressure, or flow rate with local LED status indicators. IC Role / Device Role / Timing Role: Primary LCD driver interfacing with 8-bit microcontroller over minimal 2-wire serial link; handles segment multiplexing internally. Use Value: Reduces MCU GPIO usage and firmware overhead; −40°C to +85°C rating ensures reliability in unconditioned control cabinets. |
| Digital Thermometer | Remote Display System |
|
Use Scenario: Battery-powered portable thermometer with LCD readout, low-power sleep mode, and ambient temperature compensation. IC Role / Device Role / Timing Role: Low-quiescent-current segment driver (10 µA at 5V) activated only during display update bursts. Use Value: Enables multi-year battery life using CR2032; wide 3V–10V supply range accommodates aging battery voltage drop. |
Use Scenario: Four-wire remote display where sensor head and display are separated by meters of cable in noisy factory environments. IC Role / Device Role / Timing Role: Serial-to-parallel converter minimizing EMI-prone parallel bus; isolates sensitive analog front-end from display switching noise. Use Value: Reduces wiring count and crosstalk; DATA ENABLE allows blanking during data transfer to prevent ghosting on long traces. |
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 | Provides 33rd output instead of DATA ENABLE; identical pinout, timing, and electrical specs otherwise. | Required when driving 33-segment displays or needing dedicated output for colon/dot control independent of enable logic. | Select MM5453V only if the 33rd output functionality is explicitly needed; MM5452V is preferred for standard 4½-digit numeric displays with enable-controlled blanking. |
| ICM7211AMI | 4-digit BCD-to-7-segment decoder with built-in multiplexing; requires parallel BCD input, not serial data. | Suitable for microcontroller systems with ample GPIO but no serial interface; lacks alphanumeric flexibility and cascading capability. | Choose ICM7211AMI only when BCD input is available and segment-level control is unnecessary; MM5452V offers superior serial efficiency and custom mapping. |
Compared with MM5453V, MM5452V trades one output for integrated enable control - simplifying blanking logic but limiting total segment count. Against ICM7211AMI, MM5452V shifts decoding burden to the host and enables non-numeric displays, at the cost of requiring serial firmware implementation.
Availability
MM5452V is available at Aetrix Electronics and suitable for digital voltmeters, industrial panel meters, and portable thermometers requiring stable component supply across extended product lifecycles.
Supply support for MM5452V 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 headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and consumer applications since 1930.
The MM5452V belongs to TI's legacy LCD driver product line, engineered specifically for low-power, serial-interface-driven numeric and alphanumeric segment displays in instrumentation and control systems.
FAQ
What is the function of the DATA ENABLE pin on the MM5452V?
The DATA ENABLE pin on the MM5452V is an active-high output enable control that activates all 32 segment drivers. Unlike the MM5453V, which exposes a 33rd segment output, the MM5452V repurposes that pin function as DATA ENABLE - allowing blanking or gating of the entire display without altering serial data content. This feature is essential for reducing visual artifacts during data updates in the MM5452V.
Which package type does the MM5452V use, and how does it differ from the MM5452N?
The MM5452V uses a 44-pin PLCC package (TI drawing FN0044A), whereas the MM5452N uses a 40-pin PDIP (NFJ0040A). The PLCC version offers surface-mount compatibility, higher pin density, and improved thermal performance - critical for compact industrial displays. Pin 20 on the MM5452V corresponds to Data Bit 1, confirming its physical layout differs from the PDIP variant's pin 18 assignment.
Can the MM5452V drive a 33-segment display?
No, the MM5452V cannot drive a 33-segment display because it provides only 32 segment outputs plus the DATA ENABLE function - the 33rd output is omitted by design. For 33-segment applications, the MM5453V is the designated variant, sharing identical timing, supply, and package specifications but exposing the additional output on the same pin location where MM5452V places DATA ENABLE.
How is the backplane frequency set on the MM5452V?
The backplane frequency on the MM5452V is set using an external RC network connected to the OSC_IN pin: a 50 kΩ resistor and 0.01 µF capacitor yield ~75 Hz, matching standard LCD AC drive requirements. The device's internal oscillator circuitry converts this RC time constant into a precise backplane waveform - eliminating need for external clock generators while ensuring voltage offset stays within ±50 mV.
Is the MM5452V compatible with modern microcontrollers operating at 3.3V logic levels?
Yes, the MM5452V supports TTL-compatible inputs down to VDD = 3V, with VIH = 2.0V minimum and VIL = 0.4V maximum - fully interoperable with 3.3V microcontrollers without level-shifting. Its serial interface (DATA/CLOCK) accepts standard CMOS/TTL waveforms, and the 300 ns setup/hold times align with typical MCU GPIO toggle rates, making the MM5452V suitable for direct connection to contemporary embedded hosts.
MM5452V 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 FAQ
1.How can I place an order for MM5452V through Aetrix?
Please submit a Request for Quotation (RFQ) for MM5452V 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 reliable?
The price and inventory of MM5452V are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MM5452V is usually 5 days.
3.What payment methods are accepted for MM5452V?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MM5452V transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MM5452V?
MM5452V orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MM5452V 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?
For technical support, including MM5452V datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MM5452V requirements.
6.How does Aetrix verify that MM5452V is sourced from the original manufacturer or authorized distributors?
All MM5452V 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 meets industry standards.
7.What is the process for return or replacement of MM5452V?
All MM5452V units undergo pre-shipment inspection (PSI). If there is an issue with MM5452V, 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 part is unused and in its original packaging.
Return procedure for MM5452V:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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