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Renesas ICM7245BIM44ZT
- Part No.:
- ICM7245BIM44ZT
- Manufacturer:
- Renesas
- Category:
- Display Drivers
- Package:
- 44-QFP
- Datasheet:
-
ICM7245BIM44ZT.pdf
- Description:
- IC DRVR 16 SEGMENT 44MQFP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
ICM7245BIM44ZT from Intersil is an 8-character, 16-segment LED display decoder/driver IC with integrated ASCII font ROM, 8×6 static RAM, multiplex scan circuitry, and internal 136Ω pull-up resistors. It operates from a single +3.3V supply, drives common-cathode LED displays directly, and supports both sequential and random data entry modes for microprocessor interfacing in embedded instrumentation and industrial HMI applications.
For engineers reviewing the ICM7245BIM44ZT datasheet, ICM7245BIM44ZT pinout, ICM7245BIM44ZT application, or ICM7245BIM44ZT equivalent, key selection criteria include its 44-lead MQFP package, 300mA character drive capability, 30mA segment drive current, 300Hz display scan rate, and cascading support via DISP FULL and SEN signals - all critical for multi-digit LED display subsystems requiring minimal external components.
Technical Context
The ICM7245BIM44ZT integrates a 64-character ASCII decoder ROM, 8×6-bit static memory, and on-chip multiplex oscillator (nominal 200kHz, pre-divided by 64 then by 8) to generate a 400Hz character refresh rate. Its MODE pin selects between sequential access (auto-incrementing address counter with DISP FULL overflow flag) and random access (A0–A2 address decoding).
It features dual-output driver architecture: high-current character drivers (135mA typ. at 3.3V) sink up to 300mA per digit, while 17 segment drivers (5.1mA typ. at 3.3V) source current through internal 136Ω pull-ups to drive common-cathode LEDs. OSC/OFF enables hardware shutdown with <25µA standby current while retaining memory contents.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | +3.0V to +3.6V - Enables direct compatibility with 3.3V logic systems without level-shifting. |
| Display Capacity | 8-character × 16-segment + decimal point - Supports alphanumeric displays up to 8 digits with full punctuation. |
| Character Drive Current | 135mA typical at VDD = 3.3V - Sufficient to drive high-brightness LED digits without external transistors. |
| Segment Drive Current | 5.1mA typical at VDD = 3.3V - Matches standard LED segment forward current requirements with internal 136Ω pull-ups. |
| Scan Rate | 300Hz nominal - Ensures flicker-free display visibility with ~3.3ms per character time including inter-character blanking. |
| Memory Size | 8×6-bit static RAM - Stores one 6-bit ASCII code per character position for persistent display content. |
| Operating Temperature | –25°C to +85°C - Qualified for industrial environments including panel-mounted HMIs and test equipment. |
Pinout & Package
ICM7245BIM44ZT is housed in a 44-lead Metric Quad Flatpack (MQFP), package drawing Q44.10x10, with 0.8mm lead pitch and exposed thermal pad (JEDEC MS-022AB ISSUE B). Dimensions: 10.0mm × 10.0mm body, 1.95–2.10mm height.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| D0–D5 | 6-bit parallel data input | Accepts ASCII-encoded character data; latched on WR rising edge in both SA and RA modes. |
| CS | Chip select | Enables device operation; must be low during WR transitions to register data or control actions. |
| WR | Write strobe | Active-low pulse that latches data/address and triggers memory write or mode control actions. |
| MODE | Access mode selector | High = Sequential Access (auto-increment); Low = Random Access (A0–A2 address decoded). |
| A0/SEN, A1/CLR, A2/DISP FULL | Mode-dependent I/O | In SA mode: SEN enables auto-increment, CLR clears memory/counter, DISP FULL signals overflow. In RA mode: A0–A2 select memory address (0–7). |
| OSC/OFF | Oscillator control / shutdown | Internal 200kHz oscillator; external cap lowers frequency; low voltage disables display and enters ultra-low-power standby (<25µA). |
| CHAR1–CHAR8 | Digit sink outputs | High-current open-drain outputs (300mA max) for common-cathode LED digit anodes. |
| SEG a1–m, DP | Segment source outputs | 17 segment drivers with internal 136Ω pull-ups - source current to LED cathodes when paired with CHARx sinks. |
| VDD, VSS | Power supply terminals | VDD = +3.0V to +3.6V; VSS = ground reference for all logic and analog circuitry. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated ASCII font ROM | 64-character lookup table decodes 6-bit inputs to 17-segment patterns - eliminates need for external character mapping firmware or memory. |
| Cascadable architecture | DISP FULL output and SEN input enable daisy-chaining of multiple ICM7245BIM44ZT devices for >8-character displays without glue logic or additional controllers. |
| Hardware standby mode | OSC/OFF pin assertion reduces supply current to ≤25µA while preserving display memory - ideal for battery-backed or energy-sensitive applications. |
| Inter-character blanking | ~5µs blanking interval between digit scans prevents ghosting and cross-talk in multiplexed LED arrays - ensures clean, stable digit rendering. |
| Single-supply 3.3V operation | No level shifters or dual supplies needed - simplifies PCB design and reduces BOM count in modern low-voltage embedded systems. |
Applications
| Industrial Panel Meters | Test & Measurement Equipment |
|---|---|
|
Use Scenario: Digital multimeters and programmable power supplies require compact, reliable 8-digit LED readouts with minimal MCU overhead. IC Role / Device Role / Timing Role: ICM7245BIM44ZT acts as a self-contained display controller - accepts ASCII data over parallel bus, handles multiplex timing, and drives LEDs directly. Use Value: Reduces firmware burden by offloading ASCII decoding, memory management, and scan timing - freeing MCU resources for measurement algorithms and communication. |
Use Scenario: Oscilloscopes and signal generators use multi-digit front-panel displays showing voltage, frequency, and timebase settings. IC Role / Device Role / Timing Role: ICM7245BIM44ZT serves as the dedicated display interface, receiving updated values from the host processor and maintaining stable, flicker-free output. Use Value: 300Hz scan rate and inter-character blanking ensure no visible artifacts during rapid parameter updates - critical for real-time instrument readability. |
| Embedded HMI Terminals | Appliance Control Panels |
|
Use Scenario: Factory automation HMIs display status codes, setpoints, and error messages on fixed-format LED panels. IC Role / Device Role / Timing Role: ICM7245BIM44ZT functions as a deterministic display engine - retains content during MCU interrupts and supports both sequential (streaming) and random (targeted) updates. Use Value: Standby mode (via OSC/OFF) allows instant display disable during sleep states while preserving displayed data - enabling fast wake-and-show response. |
Use Scenario: Microwave ovens, washing machines, and HVAC controllers use segmented LED displays for time, temperature, and cycle status. IC Role / Device Role / Timing Role: ICM7245BIM44ZT replaces discrete transistor arrays and decode logic - integrating memory, font, and drivers into one 44-pin MQFP. Use Value: Internal 136Ω pull-ups and 135mA digit drive eliminate external current-limiting resistors and boost transistors - reducing component count and board area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED display driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX7219CNG+ | 8-digit, 7-segment only; no 16-segment or ASCII decoding; uses SPI interface instead of parallel bus. | Suited for simpler numeric-only displays; requires external font mapping and MCU-driven multiplexing. | Select MAX7219CNG+ only if 7-segment format and serial control are acceptable - not a functional replacement for 16-segment ASCII applications. |
| TM1638 | 8-digit, 10-segment + 8-key scan; no ASCII ROM; built-in key debounce; operates at 4.5–5.5V. | Targets cost-sensitive consumer appliances with integrated keypad; lacks 16-segment flexibility and 3.3V native operation. | Choose TM1638 only for combined display+keypad designs at 5V; incompatible with ICM7245BIM44ZT's 3.3V, ASCII, and 16-segment requirements. |
Compared with MAX7219CNG+ and TM1638, the ICM7245BIM44ZT uniquely delivers 16-segment ASCII decoding, parallel microprocessor interface, and 3.3V-native operation in a single chip - making it irreplaceable for legacy or space-constrained industrial displays requiring alphanumeric capability without firmware overhead.
Availability
ICM7245BIM44ZT is available at Aetrix Electronics and suitable for industrial panel meters, test & measurement instruments, and embedded HMI terminals requiring stable component supply across extended product lifecycles.
Supply support for ICM7245BIM44ZT 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
Intersil Corporation is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, computing, and consumer markets.
The ICM7245 product line was designed specifically to simplify LED display interfacing in microprocessor-based systems - integrating memory, decoding, timing, and high-current drivers to minimize external components and software complexity.
FAQ
What is the operating voltage range for the ICM7245BIM44ZT?
The ICM7245BIM44ZT operates from +3.0V to +3.6V on VDD relative to VSS. This 3.3V-centric range ensures compatibility with modern low-voltage microcontrollers and eliminates the need for level translation. Operation outside this range - including 5V - is not supported and may damage the device, as confirmed by Absolute Maximum Ratings specifying VDD–VSS ≤ +5.5V but functional operation limited to 3.0–3.6V per Electrical Specifications.
Does the ICM7245BIM44ZT support common-anode LED displays?
No, the ICM7245BIM44ZT is designed exclusively for common-cathode LED displays. Its CHARx outputs are high-current sinks (up to 300mA), and SEGx outputs are current sources with internal 136Ω pull-ups - forming a source-sink pair that drives LED anodes via CHARx and cathodes via SEGx. Driving common-anode displays would require external inversion and is not supported by the internal architecture or datasheet application circuits.
How does the ICM7245BIM44ZT handle display blanking between characters?
The ICM7245BIM44ZT implements hardware inter-character blanking of ~5µs duration between successive digit activations. This blanking interval is generated internally by the multiplex oscillator chain and ensures no overlap between CHARx outputs - preventing ghosting or crosstalk in multiplexed LED arrays. The feature is automatic and cannot be disabled; it operates continuously during normal display scanning as shown in Figure 6 timing diagrams.
Can the ICM7245BIM44ZT be used with a microcontroller that only has an SPI interface?
The ICM7245BIM44ZT requires a parallel 6-bit data bus (D0–D5), control lines (CS, WR, MODE, A0–A2), and does not support SPI, I²C, or serial protocols natively. To interface with an SPI-only MCU, external parallel-to-serial logic (e.g., shift register + GPIO expander) would be required - adding latency, complexity, and component count. No SPI-compatible variant of the ICM7245BIM44ZT exists in the Intersil product family.
What happens to display memory when the OSC/OFF pin is pulled low?
When OSC/OFF is pulled low, the ICM7245BIM44ZT enters standby mode: the internal oscillator stops, display scanning halts, all CHARx and SEGx outputs go to high-impedance (except parasitic diodes), and supply current drops to ≤25µA. Crucially, the 8×6-bit display memory and sequential address counter retain their contents - allowing instant resumption of the prior display state upon returning OSC/OFF to high.
ICM7245BIM44ZT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 44-QFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Display Type:
- LED
- Configuration:
- 16 Segment
- Interface:
- -
- Digits or Characters:
- 8 Characters
- Current - Supply:
- 50 mA
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- -25°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 44-MQFP (10x10)
ICM7245BIM44ZT FAQ
1.How can I place an order for ICM7245BIM44ZT through Aetrix?
Please submit a Request for Quotation (RFQ) for ICM7245BIM44ZT 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 ICM7245BIM44ZT reliable?
The price and inventory of ICM7245BIM44ZT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICM7245BIM44ZT is usually 5 days.
3.What payment methods are accepted for ICM7245BIM44ZT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICM7245BIM44ZT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICM7245BIM44ZT?
ICM7245BIM44ZT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICM7245BIM44ZT 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 ICM7245BIM44ZT?
For technical support, including ICM7245BIM44ZT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICM7245BIM44ZT requirements.
6.How does Aetrix verify that ICM7245BIM44ZT is sourced from the original manufacturer or authorized distributors?
All ICM7245BIM44ZT 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 ICM7245BIM44ZT meets industry standards.
7.What is the process for return or replacement of ICM7245BIM44ZT?
All ICM7245BIM44ZT units undergo pre-shipment inspection (PSI). If there is an issue with ICM7245BIM44ZT, 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 ICM7245BIM44ZT part is unused and in its original packaging.
Return procedure for ICM7245BIM44ZT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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