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IS31FL3248-TQLS4-TR
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ISSI Integrated Silicon Solution LED Drivers, TQFP-64(7x7). Datasheet-verified pinout, KiCad symbol/footprint/3D.
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README
markdownIS31FL3248-TQLS4-TR
ISSI Integrated Silicon Solution · LED Drivers · TQFP-64(7x7)
IS31FL3248-TQLS4-TR from ISSI Integrated Silicon Solution, in a TQFP-64(7x7). Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | OUT44 | output | Constant-current sink output channel 44 (RGB group 15, B15). Tolerates up to 16V; up to 33 mA (VCC=5V) or 23 mA (VCC=3V) per channel. |
| 2 | OUT45 | output | Constant-current sink output channel 45 (RGB group 16, R16). Tolerates up to 16V; up to 33 mA (VCC=5V). |
| 3 | OUT46 | output | Constant-current sink output channel 46 (RGB group 16, G16). Tolerates up to 16V; up to 33 mA (VCC=5V). |
| 4 | OUT47 | output | Constant-current sink output channel 47 (RGB group 16, B16). Tolerates up to 16V; up to 33 mA (VCC=5V). |
| 5 | NC | unconnected | No connect. Leave floating or tie per board layout. |
| 6 | SCK/SCLK | input | Serial clock input. Acts as the SPI SCK or VSB SCLK; supports up to 33 MHz. |
| 7 | MOSI/DI | input | Serial data input. Acts as the SPI MOSI or VSB DI input. |
| 8 | CS/LAT | input | SPI chip-select (active low) or VSB latch signal. |
| 9 | SYNC/GCLK | input | Synchronization/global clock input. Used to synchronize PWM timing across cascaded devices. |
| 10 | NC | unconnected | No connect. Leave floating or tie per board layout. |
| 11 | OUT0 | output | Constant-current sink output channel 0 (RGB group 1, R1). Tolerates up to 16V; up to 33 mA (VCC=5V). |
| 12 | OUT1 | output | Constant-current sink output channel 1 (RGB group 1, G1). Tolerates up to 16V; up to 33 mA (VCC=5V). |
| 13 | OUT2 | output | Constant-current sink output channel 2 (RGB group 1, B1). Tolerates up to 16V; up to 33 mA (VCC=5V). |
| 14 | OUT3 | output | Constant-current sink output channel 3 (RGB group 2, R2). Tolerates up to 16V; up to 33 mA (VCC=5V). |
| 15 | OUT4 | output | Constant-current sink output channel 4 (RGB group 2, G2). Tolerates up to 16V; up to 33 mA (VCC=5V). |
| 16 | OUT5 | output | Constant-current sink output channel 5 (RGB group 2, B2). Tolerates up to 16V; up to 33 mA (VCC=5V). |
| 17 | OUT6 | output | Constant-current sink output channel 6 (RGB group 3, R3). Tolerates up to 16V; up to 33 mA (VCC=5V). |
| 18 | OUT7 | output | Constant-current sink output channel 7 (RGB group 3, G3). Tolerates up to 16V; up to 33 mA (VCC=5V). |
| 19 | OUT8 | output | Constant-current sink output channel 8 (RGB group 3, B3). Tolerates up to 16V; up to 33 mA (VCC=5V). |
| 20 | OUT9 | output | Constant-current sink output channel 9 (RGB group 4, R4). Tolerates up to 16V; up to 33 mA (VCC=5V). |
| 21 | OUT10 | output | Constant-current sink output channel 10 (RGB group 4, G4). Tolerates up to 16V; up to 33 mA (VCC=5V). |
| 22 | OUT11 | output | Constant-current sink output channel 11 (RGB group 4, B4). Tolerates up to 16V; up to 33 mA (VCC=5V). |
| 23 | OUT12 | output | Constant-current sink output channel 12 (RGB group 5, R5). Tolerates up to 16V; up to 33 mA (VCC=5V). |
| 24 | OUT13 | output | Constant-current sink output channel 13 (RGB group 5, G5). Tolerates up to 16V; up to 33 mA (VCC=5V). |
| 25 | OUT14 | output | Constant-current sink output channel 14 (RGB group 5, B5). Tolerates up to 16V; up to 33 mA (VCC=5V). |
| 26 | OUT15 | output | Constant-current sink output channel 15 (RGB group 6, R6). Tolerates up to 16V; up to 33 mA (VCC=5V). |
| 27 | OUT16 | output | Constant-current sink output channel 16 (RGB group 6, G6). Tolerates up to 16V; up to 33 mA (VCC=5V). |
| 28 | OUT17 | output | Constant-current sink output channel 17 (RGB group 6, B6). Tolerates up to 16V; up to 33 mA (VCC=5V). |
| 29 | OUT18 | output | Constant-current sink output channel 18 (RGB group 7, R7). Tolerates up to 16V; up to 33 mA (VCC=5V). |
| 30 | OUT19 | output | Constant-current sink output channel 19 (RGB group 7, G7). Tolerates up to 16V; up to 33 mA (VCC=5V). |
| 31 | NC | unconnected | No connect. Leave floating or tie per board layout. |
| 32 | INTB | output | Interrupt output (active low, open-drain type). Asserts when an interrupt event (e.g. LED open/short, thermal) occurs; read status via the DEh command. May be left floating if the interrupt function is not used. |
| 33 | MISO/DO | output | Serial data output. Acts as the SPI MISO or VSB DO output for chain/read-back operations. |
| 34 | BLANK | input | Blank control input. BLANK low forces all output channels off and initializes the PWM timing controller; BLANK high starts PWM timing and channels are controlled by the PWM timing controller. |
| 35 | NC | unconnected | No connect. Leave floating or tie per board layout. |
| 36 | OUT20 | output | Constant-current sink output channel 20 (RGB group 7, B7). Tolerates up to 16V; up to 33 mA (VCC=5V). |
| 37 | OUT21 | output | Constant-current sink output channel 21 (RGB group 8, R8). Tolerates up to 16V; up to 33 mA (VCC=5V). |
| 38 | OUT22 | output | Constant-current sink output channel 22 (RGB group 8, G8). Tolerates up to 16V; up to 33 mA (VCC=5V). |
| 39 | OUT23 | output | Constant-current sink output channel 23 (RGB group 8, B8). Tolerates up to 16V; up to 33 mA (VCC=5V). |
| 40 | SENSE | input | LED short-detect reference voltage. Should be connected to the LED-supply rail VLED+ (up to ~16V) so short-detect can compare (VSENSE − VOUT) against the internal threshold (~0.6V). |
| 41 | OUT24 | output | Constant-current sink output channel 24 (RGB group 9, R9). Tolerates up to 16V; up to 33 mA (VCC=5V). |
| 42 | OUT25 | output | Constant-current sink output channel 25 (RGB group 9, G9). Tolerates up to 16V; up to 33 mA (VCC=5V). |
| 43 | OUT26 | output | Constant-current sink output channel 26 (RGB group 9, B9). Tolerates up to 16V; up to 33 mA (VCC=5V). |
| 44 | OUT27 | output | Constant-current sink output channel 27 (RGB group 10, R10). Tolerates up to 16V; up to 33 mA (VCC=5V). |
| 45 | NC | unconnected | No connect. Leave floating or tie per board layout. |
| 46 | ISET | passive | Full-scale output current programming pin. Connect a resistor RISET (typ. 5.6kΩ) from ISET to GND to set IOUT_max. VISET ≈ 1.19V at RISET=5.6kΩ. |
| 47 | GND | power_in | Ground return. Tie the exposed thermal pad to this net for best thermal performance. |
| 48 | VCC | power_in | Logic/analog supply, 3.0V to 5.5V (absolute max +6.0V). Bypass with 1μF and 0.1μF capacitors close to the pin. |
| 49 | OUT28 | output | Constant-current sink output channel 28 (RGB group 10, G10). Tolerates up to 16V; up to 33 mA (VCC=5V). |
| 50 | OUT29 | output | Constant-current sink output channel 29 (RGB group 10, B10). Tolerates up to 16V; up to 33 mA (VCC=5V). |
| 51 | OUT30 | output | Constant-current sink output channel 30 (RGB group 11, R11). Tolerates up to 16V; up to 33 mA (VCC=5V). |
| 52 | OUT31 | output | Constant-current sink output channel 31 (RGB group 11, G11). Tolerates up to 16V; up to 33 mA (VCC=5V). |
| 53 | OUT32 | output | Constant-current sink output channel 32 (RGB group 11, B11). Tolerates up to 16V; up to 33 mA (VCC=5V). |
| 54 | OUT33 | output | Constant-current sink output channel 33 (RGB group 12, R12). Tolerates up to 16V; up to 33 mA (VCC=5V). |
| 55 | OUT34 | output | Constant-current sink output channel 34 (RGB group 12, G12). Tolerates up to 16V; up to 33 mA (VCC=5V). |
| 56 | OUT35 | output | Constant-current sink output channel 35 (RGB group 12, B12). Tolerates up to 16V; up to 33 mA (VCC=5V). |
| 57 | OUT36 | output | Constant-current sink output channel 36 (RGB group 13, R13). Tolerates up to 16V; up to 33 mA (VCC=5V). |
| 58 | OUT37 | output | Constant-current sink output channel 37 (RGB group 13, G13). Tolerates up to 16V; up to 33 mA (VCC=5V). |
| 59 | OUT38 | output | Constant-current sink output channel 38 (RGB group 13, B13). Tolerates up to 16V; up to 33 mA (VCC=5V). |
| 60 | OUT39 | output | Constant-current sink output channel 39 (RGB group 14, R14). Tolerates up to 16V; up to 33 mA (VCC=5V). |
| 61 | OUT40 | output | Constant-current sink output channel 40 (RGB group 14, G14). Tolerates up to 16V; up to 33 mA (VCC=5V). |
| 62 | OUT41 | output | Constant-current sink output channel 41 (RGB group 14, B14). Tolerates up to 16V; up to 33 mA (VCC=5V). |
| 63 | OUT42 | output | Constant-current sink output channel 42 (RGB group 15, R15). Tolerates up to 16V; up to 33 mA (VCC=5V). |
| 64 | OUT43 | output | Constant-current sink output channel 43 (RGB group 15, G15). Tolerates up to 16V; up to 33 mA (VCC=5V). |
| EP | GND | power_in | Exposed thermal pad on package underside. Must be connected to GND for thermal dissipation and electrical reference. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | ISSI Integrated Silicon Solution |
| Package | TQFP-64(7x7) |
| Category | LED Drivers |
| Pins | 65 |
Ordering variants
Same part, different packaging or reel option.
IS31FL3248-TQLS4-TRIS31FL3248-TQLS4-TRQFLS4-TR
CAD (KiCad official)
- Symbol:
IS31FL3248-TQLS4-TR - Footprint:
Package_QFP:TQFP-64_7x7mm_P0.4mm - 3D model: TQFP-64(7x7) (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: ISSI Integrated Silicon Solution datasheet (None pp, sha256
04c5d938194ec74d, retrieved 2026-08-17, tier: lcsc) - Extractor:
ds2sf(Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate. - CAD: KiCad official libraries (CC-BY-SA 4.0).