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LMK00338RTAT

Public Made by Adom

by adom

Texas Instruments Clock Buffers, Drivers, WQFN-40-EP(6x6). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Contents

README

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LMK00338RTAT

Texas Instruments · Clock Buffers, Drivers · WQFN-40-EP(6x6)

LMK00338RTAT from Texas Instruments, in a WQFN-40-EP(6x6). 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 CLKoutA0 output Differential clock output A0
2 CLKoutA0* output Differential clock output A0
3 VCCOA power_in Power supply for Bank A Output buffers operating from 3.3 V or 2.5 V
4 CLKoutA1 output Differential clock output A1
5 CLKoutA1* output Differential clock output A1
6 VCCOA power_in Power supply for Bank A Output buffers operating from 3.3 V or 2.5 V
7 CLKoutA2 output Differential clock output A2
8 CLKoutA2* output Differential clock output A2
9 CLKoutA3 output Differential clock output A3
10 CLKoutA3* output Differential clock output A3
11 CLKoutA_EN input Bank A low active output buffer enable
12 VCC power_in Power supply for Core and Input buffer blocks operating at 3.3 V
13 OSCin input Input for crystal accepting 10 MHz to 40 MHz crystal or single-ended clock
14 OSCout output Output for crystal, leave floating if OSCin is driven by single-ended clock
15 CLKin_SEL0 input Clock input selection pin
16 CLKin0 input Universal clock input 0 (differential or single-ended) up to 400 MHz
17 CLKin0* input Universal clock input 0 (differential or single-ended) up to 400 MHz
18 CLKin_SEL1 input Clock input selection pin
19 CLKoutB_EN input Bank B low active output buffer enable
20 GND power_in Ground
21 CLKoutB3* output Differential clock output B3
22 CLKoutB3 output Differential clock output B3
23 CLKoutB2* output Differential clock output B2
24 CLKoutB2 output Differential clock output B2
25 VCCOB power_in Power supply for Bank B Output buffers operating from 3.3 V or 2.5 V
26 CLKoutB1* output Differential clock output B1
27 CLKoutB1 output Differential clock output B1
28 VCCOB power_in Power supply for Bank B Output buffers operating from 3.3 V or 2.5 V
29 CLKoutB0* output Differential clock output B0
30 CLKoutB0 output Differential clock output B0
31 GND power_in Ground
32 VCC power_in Power supply for Core and Input buffer blocks operating at 3.3 V
33 CLKin1* input Universal clock input 1 (differential or single-ended) up to 400 MHz
34 CLKin1 input Universal clock input 1 (differential or single-ended) up to 400 MHz
35 VCC power_in Power supply for Core and Input buffer blocks operating at 3.3 V
36 REFout output LVCMOS reference output
37 VCCOC power_in Power supply for REFout Output buffer operating from 3.3 V or 2.5 V
38 REFout_EN input REFout enable input with internal synchronization to selected clock input
39 VCC power_in Power supply for Core and Input buffer blocks operating at 3.3 V
40 GND power_in Ground
41 EP passive Exposed pad (from the footprint; not named in the datasheet pin table).

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package WQFN-40-EP(6x6)
Category RTC/Clock Chip
Pins 41

CAD (KiCad official)

  • Symbol: LMK00338RTAT
  • Footprint: Package_DFN_QFN:QFN-40-1EP_6x6mm_P0.5mm_EP4.6x4.6mm
  • 3D model: WQFN-40-EP(6x6) (KiCad packages3D, STEP)
  • 3D model files: lmk00338rtat-etched.step / lmk00338rtat-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lmk00338rtat.step / lmk00338rtat.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (34 pp, sha256 89b6e86d2a67b80d, retrieved 2026-10-05, 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