component
SN74CB3Q16211DLR
Public Made by Adomby adom
Texas Instruments Analog Switches / Multiplexers, SSOP-56-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownSN74CB3Q16211DLR
Texas Instruments · Analog Switches / Multiplexers · SSOP-56-300mil
SN74CB3Q16211DLR from Texas Instruments, in a SSOP-56-300mil. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | NC | unconnected | No internal connection; the datasheet specifies no function for this pin. |
| 2 | 1A1 | bidirectional | Data I/O of bus switch 1 (A port), connected to 1B1 when 1OE is low and high-impedance when 1OE is high; I/O voltage limited to 0 V to 5.5 V recommended. |
| 3 | 1A2 | bidirectional | Data I/O of bus switch 1 (A port), connected to 1B2 when 1OE is low and high-impedance when 1OE is high; I/O voltage limited to 0 V to 5.5 V recommended. |
| 4 | 1A3 | bidirectional | Data I/O of bus switch 1 (A port), connected to 1B3 when 1OE is low and high-impedance when 1OE is high; I/O voltage limited to 0 V to 5.5 V recommended. |
| 5 | 1A4 | bidirectional | Data I/O of bus switch 1 (A port), connected to 1B4 when 1OE is low and high-impedance when 1OE is high; I/O voltage limited to 0 V to 5.5 V recommended. |
| 6 | 1A5 | bidirectional | Data I/O of bus switch 1 (A port), connected to 1B5 when 1OE is low and high-impedance when 1OE is high; I/O voltage limited to 0 V to 5.5 V recommended. |
| 7 | 1A6 | bidirectional | Data I/O of bus switch 1 (A port), connected to 1B6 when 1OE is low and high-impedance when 1OE is high; I/O voltage limited to 0 V to 5.5 V recommended. |
| 8 | GND | power_in | Ground reference for the device. |
| 9 | 1A7 | bidirectional | Data I/O of bus switch 1 (A port), connected to 1B7 when 1OE is low and high-impedance when 1OE is high; I/O voltage limited to 0 V to 5.5 V recommended. |
| 10 | 1A8 | bidirectional | Data I/O of bus switch 1 (A port), connected to 1B8 when 1OE is low and high-impedance when 1OE is high; I/O voltage limited to 0 V to 5.5 V recommended. |
| 11 | 1A9 | bidirectional | Data I/O of bus switch 1 (A port), connected to 1B9 when 1OE is low and high-impedance when 1OE is high; I/O voltage limited to 0 V to 5.5 V recommended. |
| 12 | 1A10 | bidirectional | Data I/O of bus switch 1 (A port), connected to 1B10 when 1OE is low and high-impedance when 1OE is high; I/O voltage limited to 0 V to 5.5 V recommended. |
| 13 | 1A11 | bidirectional | Data I/O of bus switch 1 (A port), connected to 1B11 when 1OE is low and high-impedance when 1OE is high; I/O voltage limited to 0 V to 5.5 V recommended. |
| 14 | 1A12 | bidirectional | Data I/O of bus switch 1 (A port), connected to 1B12 when 1OE is low and high-impedance when 1OE is high; I/O voltage limited to 0 V to 5.5 V recommended. |
| 15 | 2A1 | bidirectional | Data I/O of bus switch 2 (A port), connected to 2B1 when 2OE is low and high-impedance when 2OE is high; I/O voltage limited to 0 V to 5.5 V recommended. |
| 16 | 2A2 | bidirectional | Data I/O of bus switch 2 (A port), connected to 2B2 when 2OE is low and high-impedance when 2OE is high; I/O voltage limited to 0 V to 5.5 V recommended. |
| 17 | VCC | power_in | Supply voltage, operating range 2.3 V to 3.6 V; decouple per standard practice. |
| 18 | 2A3 | bidirectional | Data I/O of bus switch 2 (A port), connected to 2B3 when 2OE is low and high-impedance when 2OE is high; I/O voltage limited to 0 V to 5.5 V recommended. |
| 19 | GND | power_in | Ground reference for the device. |
| 20 | 2A4 | bidirectional | Data I/O of bus switch 2 (A port), connected to 2B4 when 2OE is low and high-impedance when 2OE is high; I/O voltage limited to 0 V to 5.5 V recommended. |
| 21 | 2A5 | bidirectional | Data I/O of bus switch 2 (A port), connected to 2B5 when 2OE is low and high-impedance when 2OE is high; I/O voltage limited to 0 V to 5.5 V recommended. |
| 22 | 2A6 | bidirectional | Data I/O of bus switch 2 (A port), connected to 2B6 when 2OE is low and high-impedance when 2OE is high; I/O voltage limited to 0 V to 5.5 V recommended. |
| 23 | 2A7 | bidirectional | Data I/O of bus switch 2 (A port), connected to 2B7 when 2OE is low and high-impedance when 2OE is high; I/O voltage limited to 0 V to 5.5 V recommended. |
| 24 | 2A8 | bidirectional | Data I/O of bus switch 2 (A port), connected to 2B8 when 2OE is low and high-impedance when 2OE is high; I/O voltage limited to 0 V to 5.5 V recommended. |
| 25 | 2A9 | bidirectional | Data I/O of bus switch 2 (A port), connected to 2B9 when 2OE is low and high-impedance when 2OE is high; I/O voltage limited to 0 V to 5.5 V recommended. |
| 26 | 2A10 | bidirectional | Data I/O of bus switch 2 (A port), connected to 2B10 when 2OE is low and high-impedance when 2OE is high; I/O voltage limited to 0 V to 5.5 V recommended. |
| 27 | 2A11 | bidirectional | Data I/O of bus switch 2 (A port), connected to 2B11 when 2OE is low and high-impedance when 2OE is high; I/O voltage limited to 0 V to 5.5 V recommended. |
| 28 | 2A12 | bidirectional | Data I/O of bus switch 2 (A port), connected to 2B12 when 2OE is low and high-impedance when 2OE is high; I/O voltage limited to 0 V to 5.5 V recommended. |
| 29 | 2B12 | bidirectional | Data I/O of bus switch 2 (B port), connected to 2A12 when 2OE is low and high-impedance when 2OE is high; I/O voltage limited to 0 V to 5.5 V recommended. |
| 30 | 2B11 | bidirectional | Data I/O of bus switch 2 (B port), connected to 2A11 when 2OE is low and high-impedance when 2OE is high; I/O voltage limited to 0 V to 5.5 V recommended. |
| 31 | 2B10 | bidirectional | Data I/O of bus switch 2 (B port), connected to 2A10 when 2OE is low and high-impedance when 2OE is high; I/O voltage limited to 0 V to 5.5 V recommended. |
| 32 | 2B9 | bidirectional | Data I/O of bus switch 2 (B port), connected to 2A9 when 2OE is low and high-impedance when 2OE is high; I/O voltage limited to 0 V to 5.5 V recommended. |
| 33 | 2B8 | bidirectional | Data I/O of bus switch 2 (B port), connected to 2A8 when 2OE is low and high-impedance when 2OE is high; I/O voltage limited to 0 V to 5.5 V recommended. |
| 34 | 2B7 | bidirectional | Data I/O of bus switch 2 (B port), connected to 2A7 when 2OE is low and high-impedance when 2OE is high; I/O voltage limited to 0 V to 5.5 V recommended. |
| 35 | 2B6 | bidirectional | Data I/O of bus switch 2 (B port), connected to 2A6 when 2OE is low and high-impedance when 2OE is high; I/O voltage limited to 0 V to 5.5 V recommended. |
| 36 | 2B5 | bidirectional | Data I/O of bus switch 2 (B port), connected to 2A5 when 2OE is low and high-impedance when 2OE is high; I/O voltage limited to 0 V to 5.5 V recommended. |
| 37 | 2B4 | bidirectional | Data I/O of bus switch 2 (B port), connected to 2A4 when 2OE is low and high-impedance when 2OE is high; I/O voltage limited to 0 V to 5.5 V recommended. |
| 38 | GND | power_in | Ground reference for the device. |
| 39 | 2B3 | bidirectional | Data I/O of bus switch 2 (B port), connected to 2A3 when 2OE is low and high-impedance when 2OE is high; I/O voltage limited to 0 V to 5.5 V recommended. |
| 40 | 2B2 | bidirectional | Data I/O of bus switch 2 (B port), connected to 2A2 when 2OE is low and high-impedance when 2OE is high; I/O voltage limited to 0 V to 5.5 V recommended. |
| 41 | 2B1 | bidirectional | Data I/O of bus switch 2 (B port), connected to 2A1 when 2OE is low and high-impedance when 2OE is high; I/O voltage limited to 0 V to 5.5 V recommended. |
| 42 | 1B12 | bidirectional | Data I/O of bus switch 1 (B port), connected to 1A12 when 1OE is low and high-impedance when 1OE is high; I/O voltage limited to 0 V to 5.5 V recommended. |
| 43 | 1B11 | bidirectional | Data I/O of bus switch 1 (B port), connected to 1A11 when 1OE is low and high-impedance when 1OE is high; I/O voltage limited to 0 V to 5.5 V recommended. |
| 44 | 1B10 | bidirectional | Data I/O of bus switch 1 (B port), connected to 1A10 when 1OE is low and high-impedance when 1OE is high; I/O voltage limited to 0 V to 5.5 V recommended. |
| 45 | 1B9 | bidirectional | Data I/O of bus switch 1 (B port), connected to 1A9 when 1OE is low and high-impedance when 1OE is high; I/O voltage limited to 0 V to 5.5 V recommended. |
| 46 | 1B8 | bidirectional | Data I/O of bus switch 1 (B port), connected to 1A8 when 1OE is low and high-impedance when 1OE is high; I/O voltage limited to 0 V to 5.5 V recommended. |
| 47 | 1B7 | bidirectional | Data I/O of bus switch 1 (B port), connected to 1A7 when 1OE is low and high-impedance when 1OE is high; I/O voltage limited to 0 V to 5.5 V recommended. |
| 48 | 1B6 | bidirectional | Data I/O of bus switch 1 (B port), connected to 1A6 when 1OE is low and high-impedance when 1OE is high; I/O voltage limited to 0 V to 5.5 V recommended. |
| 49 | GND | power_in | Ground reference for the device. |
| 50 | 1B5 | bidirectional | Data I/O of bus switch 1 (B port), connected to 1A5 when 1OE is low and high-impedance when 1OE is high; I/O voltage limited to 0 V to 5.5 V recommended. |
| 51 | 1B4 | bidirectional | Data I/O of bus switch 1 (B port), connected to 1A4 when 1OE is low and high-impedance when 1OE is high; I/O voltage limited to 0 V to 5.5 V recommended. |
| 52 | 1B3 | bidirectional | Data I/O of bus switch 1 (B port), connected to 1A3 when 1OE is low and high-impedance when 1OE is high; I/O voltage limited to 0 V to 5.5 V recommended. |
| 53 | 1B2 | bidirectional | Data I/O of bus switch 1 (B port), connected to 1A2 when 1OE is low and high-impedance when 1OE is high; I/O voltage limited to 0 V to 5.5 V recommended. |
| 54 | 1B1 | bidirectional | Data I/O of bus switch 1 (B port), connected to 1A1 when 1OE is low and high-impedance when 1OE is high; I/O voltage limited to 0 V to 5.5 V recommended. |
| 55 | 2OE | input | Active-low output enable for bus switch 2: low connects 2A to 2B, high places the switch in high-impedance; should be pulled up to VCC through a resistor. |
| 56 | 1OE | input | Active-low output enable for bus switch 1: low connects 1A to 1B, high places the switch in high-impedance; should be pulled up to VCC through a resistor. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SSOP-56-300mil |
| Category | Communication Interface Chip/UART/485/232 |
| Pins | 56 |
CAD (KiCad official)
- Symbol:
SN74CB3Q16211DLR - Footprint:
Package_SO:SSOP-56_7.5x18.5mm_P0.635mm - 3D model: SSOP-56-300mil (KiCad packages3D, STEP)
- 3D model files:
sn74cb3q16211dlr-etched.step/sn74cb3q16211dlr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sn74cb3q16211dlr.step/sn74cb3q16211dlr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (22 pp, sha256
99b6c9c146dbc8bd, retrieved 2026-10-11, tier: lcsc) - Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-5-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).