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ONET1131ECRSMR

Public Made by Adom

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Texas Instruments Laser Drivers, VQFN-32(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Symbol & Footprint

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Datasheet

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Contents

README

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ONET1131ECRSMR

Texas Instruments · Laser Drivers · VQFN-32(4x4)

ONET1131ECRSMR from Texas Instruments, in a VQFN-32(4x4). 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 LOL tri_state Loss of lock indicator with open-drain output asserts high when transmitter CDR is out of lock; requires external 4.7 kΩ to 10 kΩ pull-up resistor to VCC; 3.3 V tolerant.
2 MONB output Bias current monitor analog output.
3 GND power_in Circuit ground supply connection.
4 DIN+ input Non-inverted transmitter data input with on-chip 100 Ω differential termination to DIN- and AC coupling requirement.
5 DIN- input Inverted transmitter data input with on-chip 100 Ω differential termination to DIN+ and AC coupling requirement.
6 GND power_in Circuit ground supply connection.
7 PD input Photodiode input capable of sourcing or sinking current dependent on register setting.
8 MONP output Photodiode current monitor analog output.
9 LF passive Transmitter loop filter capacitor connection.
10 BIAS passive Analog pin that sinks or sources bias current for the laser in both APC and open loop modes.
11 VCC power_in 2.5 V ± 5% supply voltage for analog circuitry.
12 OUT- output Inverted transmitter data output internally terminated in single-ended operation mode.
13 OUT+ output Non-inverted transmitter data output CML interface.
14 VCC power_in 2.5 V ± 5% supply voltage for analog circuitry.
15 VDD power_in 2.5 V ± 5% supply voltage for the digital circuitry.
16 AMP input Output amplitude control analog input accepting 0 to 2 V to adjust output amplitude; leave open when not used.
17 SDA bidirectional 2-wire interface serial data input/output requiring external 4.7 kΩ to 10 kΩ pull-up resistor to VCC; 3.3 V tolerant.
18 SCK input 2-wire interface serial clock input requiring external 4.7 kΩ to 10 kΩ pull-up resistor to VCC; 3.3 V tolerant.
19 GND power_in Circuit ground supply connection.
20 NC unconnected Do not connect.
21 NC unconnected Do not connect.
22 GND power_in Circuit ground supply connection.
23 COMP passive Compensation pin for APC loop bandwidth control; connect 0.01 µF capacitor to ground.
24 NC unconnected Do not connect.
25 NC unconnected Do not connect.
26 NC unconnected Do not connect.
27 VCC power_in 2.5 V ± 5% supply voltage for analog circuitry.
28 NC unconnected Do not connect.
29 NC unconnected Do not connect.
30 VCC power_in 2.5 V ± 5% supply voltage for analog circuitry.
31 FLT tri_state Transmitter fault detection flag with open-drain output asserts high when fault occurs; requires external 4.7 kΩ to 10 kΩ pull-up resistor to VCC; 3.3 V tolerant.
32 DIS input Bias current disable input with internal 250 kΩ pull-up and external 4.7 kΩ to 10 kΩ pull-up requirement; disables bias when high; toggle to reset fault condition; 3.3 V tolerant.
33 EP passive Exposed pad (from the footprint; not named in the datasheet pin table).

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package VQFN-32(4x4)
Category LED Drivers
Pins 33

CAD (KiCad official)

  • Symbol: ONET1131ECRSMR
  • Footprint: Package_DFN_QFN:QFN-32-1EP_4x4mm_P0.4mm_EP2.9x2.9mm
  • 3D model: VQFN-32(4x4) (KiCad packages3D, STEP)
  • 3D model files: onet1131ecrsmr-etched.step / onet1131ecrsmr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); onet1131ecrsmr.step / onet1131ecrsmr.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Texas Instruments datasheet (49 pp, sha256 65452def5c526f68, retrieved 2026-10-03, 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, primary claude-haiku-4-5-20251001 (text), consensus claude-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).

Datasheet PDF