diff --git a/L1Trigger/Phase2L1ParticleFlow/plugins/L1CTDeregionizerFileWriter.cc b/L1Trigger/Phase2L1ParticleFlow/plugins/L1CTDeregionizerFileWriter.cc
new file mode 100644
index 0000000000000..fe0b8b97d568b
--- /dev/null
+++ b/L1Trigger/Phase2L1ParticleFlow/plugins/L1CTDeregionizerFileWriter.cc
@@ -0,0 +1,114 @@
+#include <memory>
+#include <numeric>
+
+// user include files
+#include "FWCore/Framework/interface/Frameworkfwd.h"
+#include "FWCore/Framework/interface/one/EDAnalyzer.h"
+
+#include "FWCore/Framework/interface/Event.h"
+#include "FWCore/Framework/interface/MakerMacros.h"
+
+#include "FWCore/ParameterSet/interface/ParameterSet.h"
+#include "FWCore/Utilities/interface/InputTag.h"
+
+#include "DataFormats/Common/interface/View.h"
+
+#include "L1Trigger/DemonstratorTools/interface/BoardDataWriter.h"
+#include "L1Trigger/DemonstratorTools/interface/utilities.h"
+#include "DataFormats/L1TParticleFlow/interface/PFCandidate.h"
+
+//
+// class declaration
+//
+
+class L1CTDeregionizerFileWriter : public edm::one::EDAnalyzer<edm::one::SharedResources> {
+public:
+  explicit L1CTDeregionizerFileWriter(const edm::ParameterSet&);
+
+  static void fillDescriptions(edm::ConfigurationDescriptions& descriptions);
+
+private:
+  // ----------constants, enums and typedefs ---------
+  edm::EDGetTokenT<std::vector<l1t::PFCandidate>> l1PFToken_;
+  size_t nFramesPerBX_;
+  size_t ctl2BoardTMUX_;
+  size_t gapLengthOutput_;
+  size_t maxLinesPerFile_;
+  std::map<l1t::demo::LinkId, std::pair<l1t::demo::ChannelSpec, std::vector<size_t>>> channelSpecsOutput_;
+
+  // ----------member functions ----------------------
+  void analyze(const edm::Event&, const edm::EventSetup&) override;
+  void endJob() override;
+
+  std::vector<std::vector<ap_uint<64>>> encodePuppi(const std::vector<l1t::PFCandidate> particles, const int nrows);
+
+  l1t::demo::BoardDataWriter fileWriterOutput_;
+};
+
+L1CTDeregionizerFileWriter::L1CTDeregionizerFileWriter(const edm::ParameterSet& iConfig)
+    : l1PFToken_(consumes<std::vector<l1t::PFCandidate>>(iConfig.getParameter<edm::InputTag>("L1PFObjects"))),
+      nFramesPerBX_(iConfig.getParameter<unsigned>("nFramesPerBX")),
+      ctl2BoardTMUX_(iConfig.getParameter<unsigned>("TMUX")),
+      gapLengthOutput_(iConfig.getParameter<unsigned>("gapLengthOutput")),
+      maxLinesPerFile_(iConfig.getParameter<unsigned>("maxLinesPerFile")),
+      channelSpecsOutput_{
+          {{"deregionizer", 0}, {{ctl2BoardTMUX_, gapLengthOutput_}, {0}}},
+          {{"deregionizer", 1}, {{ctl2BoardTMUX_, gapLengthOutput_}, {1}}},
+          {{"deregionizer", 2}, {{ctl2BoardTMUX_, gapLengthOutput_}, {2}}},
+          {{"deregionizer", 3}, {{ctl2BoardTMUX_, gapLengthOutput_}, {3}}},
+      },
+      fileWriterOutput_(l1t::demo::parseFileFormat(iConfig.getParameter<std::string>("format")),
+                        iConfig.getParameter<std::string>("outputFilename"),
+                        iConfig.getParameter<std::string>("outputFileExtension"),
+                        nFramesPerBX_,
+                        ctl2BoardTMUX_,
+                        maxLinesPerFile_,
+                        channelSpecsOutput_) {}
+
+void L1CTDeregionizerFileWriter::analyze(const edm::Event& iEvent, const edm::EventSetup& iSetup) {
+  using namespace edm;
+
+  const std::vector<l1t::PFCandidate> particles = iEvent.get(l1PFToken_);
+  std::vector<std::vector<ap_uint<64>>> link_words = encodePuppi(particles, 4);
+
+  l1t::demo::EventData eventData;
+  for (size_t i = 0; i < 4; i++) {
+    eventData.add({"deregionizer", i}, link_words.at(i));
+  }
+  fileWriterOutput_.addEvent(eventData);
+}
+
+// ------------ method called once each job just after ending the event loop  ------------
+void L1CTDeregionizerFileWriter::endJob() {
+  // Writing pending events to file before exiting
+  fileWriterOutput_.flush();
+}
+
+std::vector<std::vector<ap_uint<64>>> L1CTDeregionizerFileWriter::encodePuppi(
+    const std::vector<l1t::PFCandidate> particles, const int nrows) {
+  // 'reshape' the 1D View of particles to a 2D vector with nrows in the first dimension
+  // pack the particles to their 64 bit HW representation
+  std::vector<std::vector<ap_uint<64>>> particles_packed_reshaped(nrows);
+  for (uint i = 0; i < particles.size(); i++) {
+    ap_uint<64> p = particles.at(i).encodedPuppi64();
+    particles_packed_reshaped[i % nrows].push_back(p);
+  }
+  return particles_packed_reshaped;
+}
+
+// ------------ method fills 'descriptions' with the allowed parameters for the module  ------------
+void L1CTDeregionizerFileWriter::fillDescriptions(edm::ConfigurationDescriptions& descriptions) {
+  edm::ParameterSetDescription desc;
+  desc.add<edm::InputTag>("L1PFObjects", edm::InputTag("l1tLayer2Deregionizer", "Puppi"));
+  desc.add<std::string>("outputFilename", "L1CTDeregionizerPatterns");
+  desc.add<std::string>("outputFileExtension", "txt.gz");
+  desc.add<uint32_t>("nFramesPerBX", 9);
+  desc.add<uint32_t>("gapLengthOutput", 4);
+  desc.add<uint32_t>("TMUX", 6);
+  desc.add<uint32_t>("maxLinesPerFile", 1024);
+  desc.add<std::string>("format", "EMPv2");
+  descriptions.addDefault(desc);
+}
+
+//define this as a plug-in
+DEFINE_FWK_MODULE(L1CTDeregionizerFileWriter);
diff --git a/L1Trigger/Phase2L1ParticleFlow/test/make_l1ct_binaryFiles_cfg.py b/L1Trigger/Phase2L1ParticleFlow/test/make_l1ct_binaryFiles_cfg.py
index 40597a93eff4c..18e5d7da10b6e 100644
--- a/L1Trigger/Phase2L1ParticleFlow/test/make_l1ct_binaryFiles_cfg.py
+++ b/L1Trigger/Phase2L1ParticleFlow/test/make_l1ct_binaryFiles_cfg.py
@@ -82,7 +82,7 @@
                                                nJets = cms.uint32(12))
                                       ])
 process.l1tLayer2SeedConeJetWriter = l1tSeededConeJetFileWriter.clone(collections = l1ctLayer2SCJetsProducts)
-
+process.l1tLayer2DeregionizerWriter = cms.EDAnalyzer('L1CTDeregionizerFileWriter')
 process.l1tLayer1BarrelTDR = process.l1tLayer1Barrel.clone()
 process.l1tLayer1BarrelTDR.regionizerAlgo = cms.string("TDR")
 process.l1tLayer1BarrelTDR.regionizerAlgoParameters = cms.PSet(
@@ -166,10 +166,12 @@
     process.l1tLayer2EG.outPatternFile.maxLinesPerFile = _eventsPerFile*54
 
 #####################################################################################################################
-## Layer 2 seeded-cone jets 
+## Layer 2 seeded-cone jets and deregionizer
 if not args.patternFilesOFF:
     process.runPF.insert(process.runPF.index(process.l1tSC8PFL1PuppiCorrectedEmulator)+1, process.l1tLayer2SeedConeJetWriter)
     process.l1tLayer2SeedConeJetWriter.maxLinesPerFile = _eventsPerFile*54
+    process.runPF.insert(process.runPF.index(process.l1tLayer2SeedConeJetWriter)+1, process.l1tLayer2DeregionizerWriter)
+    process.l1tLayer2DeregionizerWriter.maxLinesPerFile = cms.uint32(_eventsPerFile*54)
 
 if not args.dumpFilesOFF:
   for det in "Barrel", "BarrelTDR", "BarrelSerenity", "HGCal", "HGCalElliptic", "HGCalNoTK", "HF":