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Toshiba Semiconductor and Storage TC62D748CFG,EL
- Part No.:
- TC62D748CFG,EL
- Manufacturer:
- Toshiba Semiconductor and Storage
- Category:
- LED Drivers
- Package:
- 24-SOP (0.236", 6.00mm Width)
- Datasheet:
-
TC62D748CFG,EL.pdf
- Description:
- 16-CH CONSTANT CURRENT LED DRIVE
- Quantity:
- Payment:
- Shipping:
Inventory:2,000
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Product details
Overview
TC62D748CFG from Toshiba is a 16-channel constant-current LED driver IC with CMOS-based shift register, latch, and AND-gate logic, operating from 3.0–5.5 V supply, delivering programmable output current (1.5–90 mA per channel) via single external resistor REXT, and supporting high-speed serial data transfer up to 25 MHz for LED display lighting systems.
For engineers reviewing the TC62D748CFG datasheet, TC62D748CFG pinout, TC62D748CFG application, or TC62D748CFG equivalent, this page delivers verified technical context, real-world design meaning of key specs, SSOP24 package layout, functional alternatives, and supply-chain support for industrial LED signage, panel backlighting, and static/dynamic LED array control.
Technical Context
The TC62D748CFG integrates a 16-bit shift register, 16-bit D-latch, 16-channel AND gate, and 16 independent constant-current sinks - all fabricated in Toshiba's CDMOS process for robust noise immunity and high-speed operation. Its Schmitt-trigger inputs tolerate slow-rising signals, and the power-on-reset (POR) ensures deterministic initialization at VDD ≥ 3.0 V.
Output current is set globally by REXT (1.04 V / REXT × 16.6), enabling precise per-channel matching: ±1.5 % (S rank) or ±2.5 % (N rank) between outputs and across devices. The OE pin provides hardware-level output disable with 25 ns minimum pulse width, while SOUT enables daisy-chaining for multi-device configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage | 3.0–5.5 V - supports both 3.3 V and 5 V logic domains without level-shifting. |
| Output current range | 1.5–90 mA per channel - set by single REXT resistor; enables uniform brightness scaling across 16 LEDs. |
| Current accuracy | ±1.5 % (S rank) ch-to-ch - ensures <1.5 % luminance variation across 16 channels under same REXT and VDD. |
| Max output voltage | 17 V - supports driving strings of up to ~5 white LEDs (Vf ≈ 3.4 V) with 1 V headroom. |
| Data clock frequency | 25 MHz max - allows full 16-bit load in ≤640 ns, enabling >1.5 kHz refresh for dynamic LED patterns. |
| Enable pulse width | 25 ns min (OE low) - permits rapid blanking during multiplexed scanning without ghosting. |
| Operating temperature | −40 to +85 °C - qualified for industrial indoor/outdoor LED signage and instrumentation panels. |
Pinout & Package
TC62D748CFG is housed in a 24-pin SSOP (Shrink Small Outline Package) with 0.65 mm pitch, body size 8.2 × 5.3 mm, and typical weight 0.29 g - optimized for compact LED driver modules and space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | Common return path for all internal logic and output current sinks; must be low-impedance to minimize ground bounce during switching. |
| SIN (Pin 2) | Serial data input | CMOS/Schmitt-trigger input accepting 3.3/5 V logic; accepts LSB-first 16-bit data stream synchronized to SCK. |
| SCK (Pin 3) | Serial clock input | Edge-triggered clock up to 25 MHz; rising edge latches SIN data into shift register. |
| SLAT (Pin 4) | Latch enable | Level-sensitive (not edge-triggered); "H" transfers shift register contents to output latches; "L" holds latched state. |
| OUT0–OUT15 (Pins 5–20) | Constant-current sink outputs | 16 open-drain outputs each sourcing up to 90 mA; voltage compliance up to 17 V; share common REXT for current setting. |
| OE (Pin 21) | Output enable | Active-low global disable: "H" forces all OUTx OFF regardless of latch data; critical for blanking and fault isolation. |
| SOUT (Pin 22) | Serial data output | Shift register Q15 output; enables cascading multiple TC62D748CFGs for >16-channel expansion. |
| REXT (Pin 23) | Current-setting reference | Connects to GND via precision resistor (e.g., 1.2 kΩ → 14.4 mA/channel); sets all 16 outputs simultaneously. |
| VDD (Pin 24) | Power supply | 3.0–5.5 V supply for logic and output drivers; requires local 0.1 µF decoupling capacitor near pin. |
Key Features
| Feature | Design Value |
|---|---|
| Single-resistor current programming | One external REXT sets identical current across all 16 channels - eliminates 16 individual resistors and reduces BOM cost and layout area. |
| Integrated shift + latch + AND logic | Enables synchronous update of all 16 outputs with minimal MCU GPIO usage - only SIN, SCK, SLAT, and OE required. |
| Hardware output disable (OE) | Sub-30 ns OE response time allows pixel-level blanking in high-refresh-rate LED matrices without software overhead. |
| Daisy-chain capability (SOUT) | SOUT pin outputs shifted-out bit 15, enabling seamless expansion to N × 16 channels using one MCU SPI interface. |
| Power-on reset (POR) | Guarantees known initial state on power-up - prevents random LED turn-on or flicker during system startup. |
Applications
| LED Signage Panels | Industrial HMI Backlighting |
|---|---|
|
Use Scenario: Driving 16-segment alphanumeric displays or dot-matrix signs with uniform brightness and minimal MCU resource usage. IC Role / Device Role / Timing Role: Constant-current sink driver providing stable per-segment current; shift/latch logic handles serial-to-parallel conversion and synchronous update. Use Value: Eliminates discrete current-limiting resistors per segment, reduces thermal drift across segments, and supports >1 kHz multiplexing via fast OE blanking. |
Use Scenario: Backlighting segmented buttons, status indicators, or small LCD panels in factory HMIs where long-term luminance stability is critical. IC Role / Device Role / Timing Role: Precision current source ensuring consistent LED intensity over temperature (−40 to +85 °C) and lifetime. Use Value: ±1.5 % channel-to-channel matching maintains visual uniformity; POR prevents unintended illumination at power-on. |
| Static LED Array Lighting | Dynamic LED Scrolling Displays |
|
Use Scenario: Illuminating fixed-position LED arrays in architectural lighting, emergency exit signs, or instrument panel overlays. IC Role / Device Role / Timing Role: Parallel-output constant-current driver configured for static ON/OFF states; REXT sets baseline current for all 16 LEDs. Use Value: Single-resistor tuning simplifies calibration; 17 V output compliance accommodates mixed-color LED strings (e.g., red + green + blue). |
Use Scenario: Driving horizontally scrolling text or graphics on LED matrix boards using cascaded TC62D748CFGs. IC Role / Device Role / Timing Role: Serial-input, latch-controlled sink driver enabling high-speed pattern updates via SOUT daisy-chaining. Use Value: 25 MHz SCK supports full 16-bit load in <640 ns; fast tor/tof (<45 ns/<20 ns) minimizes ghosting during rapid refresh. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar constant-current LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Toshiba TC62D749FG | Same pinout and architecture, but optimized for higher-speed switching: twOE(L) = 15 ns (vs. 25 ns), tor = 20 ns (vs. 30 ns), tof = 8 ns (vs. 10 ns). | Better suited for >2 kHz multiplexed LED displays requiring tighter blanking timing. | Select TC62D749FG when sub-20 ns OE response or <25 ns output transitions are mandatory; otherwise TC62D748CFG offers identical functionality at lower cost. |
| ON Semiconductor CAT4016 | 16-channel constant-current driver with similar REXT programming, but lacks SOUT daisy-chain and has slower max clock (10 MHz vs. 25 MHz). | Acceptable for static or low-refresh LED arrays, but not for high-speed scrolling or cascaded configurations. | Choose CAT4016 only if daisy-chaining and >15 MHz data rates are unnecessary; verify OE timing (100 ns min) meets blanking requirements. |
Compared with TC62D748CFG, TC62D749FG delivers faster output control for demanding multiplexed displays, while CAT4016 provides basic 16-channel drive without serial expansion - making TC62D748CFG the optimal balance of speed, flexibility, and cost for mid-to-high performance LED systems.
Availability
TC62D748CFG is available at Aetrix Electronics and suitable for LED signage panels, industrial HMI backlighting, and static/dynamic LED array lighting requiring stable component supply, long-term manufacturability, and RoHS-compliant packaging.
Supply support for TC62D748CFG 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
Toshiba Electronic Devices & Storage Corporation designs and manufactures high-reliability semiconductor solutions for industrial, automotive, and consumer applications, with deep expertise in power management, motor control, and LED driver ICs.
The TC62D748CFG belongs to Toshiba's CDMOS LED driver family, engineered specifically for high-accuracy, high-density LED array control in commercial signage, instrumentation, and industrial human-machine interfaces.
FAQ
What is the maximum number of TC62D748CFG devices that can be daisy-chained using the SOUT pin?
The TC62D748CFG SOUT pin outputs the serial data bit shifted out from its internal 16-bit shift register (Q15). While no hard limit is specified, practical daisy-chaining is constrained by signal integrity: cumulative clock rise/fall time degradation beyond 500 ns (per datasheet Note 1) limits reliable cascading to ≤5–8 devices on standard FR-4 PCBs. For larger arrays, use buffered clock distribution or consider TC62D749FG's improved timing margins. Always validate timing with oscilloscope measurements on your specific layout.
How does the TC62D748CFG handle output current variation across temperature and supply voltage?
The TC62D748CFG specifies constant-current output voltage regulation (%VOUT) as ±0.1 to ±0.5 %/V and power supply regulation (%VDD) as ±1 to ±5 %/V - meaning output current changes less than ±0.5 % per volt change in VOUT and less than ±5 % per volt change in VDD. Over −40 to +85 °C, total current drift remains within ±5 % of nominal value when REXT and VDD are stable. This makes TC62D748CFG suitable for applications where LED brightness consistency matters more than absolute current precision.
Can the TC62D748CFG drive LEDs with forward voltages exceeding 17 V?
No. The TC62D748CFG absolute maximum output voltage (VOUT) is 17 V, and its guaranteed operational range is up to 17 V. Driving LED strings whose total Vf exceeds 17 V risks violating the absolute maximum rating, potentially causing permanent damage. For higher-voltage strings, use external high-side switches or select a driver with ≥20 V compliance (e.g., TI TLC5940 or Diodes Inc. AL8863). Always maintain ≥1 V headroom between VLED and VOUT(max) per datasheet recommendation.
What is the role of the SLAT pin, and why is it level-sensitive rather than edge-triggered?
The SLAT (latch) pin is a level-sensitive control that determines whether the 16-bit shift register output is transferred to the output latches. When SLAT = "H", data flows transparently from shift register to latches; when SLAT = "L", latches hold their state. This design allows synchronous updating of all 16 outputs after full 16-bit load - critical for glitch-free LED matrix refresh. Unlike edge-triggered latches, level-sensitive SLAT avoids metastability and enables precise timing alignment with OE blanking pulses in multiplexed systems.
Does the TC62D748CFG require external pull-up or pull-down resistors on its control pins?
Yes - internal weak pull-up (400–600 kΩ on OE) and pull-down (400–600 kΩ on SLAT) resistors are integrated, but external resistors are recommended for noise immunity in electrically noisy environments. For SIN, SCK, and OE, a 10 kΩ pull-down ensures defined logic low during MCU reset; for SLAT, a 10 kΩ pull-up guarantees latch hold on power-up. These prevent unintended output toggling due to floating inputs, especially in industrial settings with EMI or long traces.
TC62D748CFG,EL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Toshiba Semiconductor and Storage
- Series:
- -
- Package/Case:
- 24-SOP (0.236", 6.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Linear
- Topology:
- Shift Register
- Internal Switch(s):
- No
- Number of Outputs:
- 16
- Voltage - Supply (Min):
- 3V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- 17V
- Current - Output / Channel:
- 90mA
- Frequency:
- -
- Dimming:
- No
- Applications:
- LED Lighting
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-SSOP
TC62D748CFG,EL FAQ
1.How can I place an order for TC62D748CFG,EL through Aetrix?
Please submit a Request for Quotation (RFQ) for TC62D748CFG,EL 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 TC62D748CFG,EL reliable?
The price and inventory of TC62D748CFG,EL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC62D748CFG,EL is usually 5 days.
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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 TC62D748CFG,EL?
For technical support, including TC62D748CFG,EL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC62D748CFG,EL requirements.
6.How does Aetrix verify that TC62D748CFG,EL is sourced from the original manufacturer or authorized distributors?
All TC62D748CFG,EL 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 TC62D748CFG,EL meets industry standards.
7.What is the process for return or replacement of TC62D748CFG,EL?
All TC62D748CFG,EL units undergo pre-shipment inspection (PSI). If there is an issue with TC62D748CFG,EL, 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 TC62D748CFG,EL part is unused and in its original packaging.
Return procedure for TC62D748CFG,EL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TC62D748CFG,EL Tags
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