diff --git a/compiler/characterizer/lib.py b/compiler/characterizer/lib.py
index d65066fd..7b10eb8f 100644
--- a/compiler/characterizer/lib.py
+++ b/compiler/characterizer/lib.py
@@ -329,7 +329,7 @@ class lib:
         self.lib.write("        timing(){ \n")
         self.lib.write("            timing_sense : non_unate; \n")
         self.lib.write("            related_pin : \"clk{0}\"; \n".format(read_port))
-        self.lib.write("            timing_type : negative_edge; \n")
+        self.lib.write("            timing_type : falling_edge; \n")
         self.lib.write("            cell_rise(CELL_TABLE) {\n")
         self.write_values(self.char_port_results[read_port]["delay_lh"],len(self.loads),"            ")
         self.lib.write("            }\n") # rise delay
diff --git a/compiler/tests/golden/sram_2_16_1_freepdk45_TT_1p0V_25C.lib b/compiler/tests/golden/sram_2_16_1_freepdk45_TT_1p0V_25C.lib
index 868ed2b2..fc8d2be3 100644
--- a/compiler/tests/golden/sram_2_16_1_freepdk45_TT_1p0V_25C.lib
+++ b/compiler/tests/golden/sram_2_16_1_freepdk45_TT_1p0V_25C.lib
@@ -136,7 +136,7 @@ cell (sram_2_16_1_freepdk45){
         timing(){ 
             timing_sense : non_unate; 
             related_pin : "clk0"; 
-            timing_type : rising_edge; 
+            timing_type : falling_edge; 
             cell_rise(CELL_TABLE) {
             values("0.235, 0.235, 0.239",\
                    "0.235, 0.236, 0.24",\
diff --git a/compiler/tests/golden/sram_2_16_1_freepdk45_TT_1p0V_25C_analytical.lib b/compiler/tests/golden/sram_2_16_1_freepdk45_TT_1p0V_25C_analytical.lib
index 60f4f9b3..afb22057 100644
--- a/compiler/tests/golden/sram_2_16_1_freepdk45_TT_1p0V_25C_analytical.lib
+++ b/compiler/tests/golden/sram_2_16_1_freepdk45_TT_1p0V_25C_analytical.lib
@@ -136,7 +136,7 @@ cell (sram_2_16_1_freepdk45){
         timing(){ 
             timing_sense : non_unate; 
             related_pin : "clk0"; 
-            timing_type : rising_edge; 
+            timing_type : falling_edge; 
             cell_rise(CELL_TABLE) {
             values("0.098, 0.098, 0.098",\
                    "0.098, 0.098, 0.098",\
diff --git a/compiler/tests/golden/sram_2_16_1_freepdk45_TT_1p0V_25C_pruned.lib b/compiler/tests/golden/sram_2_16_1_freepdk45_TT_1p0V_25C_pruned.lib
index 4a809be2..b20f10be 100644
--- a/compiler/tests/golden/sram_2_16_1_freepdk45_TT_1p0V_25C_pruned.lib
+++ b/compiler/tests/golden/sram_2_16_1_freepdk45_TT_1p0V_25C_pruned.lib
@@ -136,7 +136,7 @@ cell (sram_2_16_1_freepdk45){
         timing(){ 
             timing_sense : non_unate; 
             related_pin : "clk0"; 
-            timing_type : rising_edge; 
+            timing_type : falling_edge; 
             cell_rise(CELL_TABLE) {
             values("0.233, 0.233, 0.237",\
                    "0.233, 0.234, 0.237",\
diff --git a/compiler/tests/golden/sram_2_16_1_scn4m_subm_TT_5p0V_25C.lib b/compiler/tests/golden/sram_2_16_1_scn4m_subm_TT_5p0V_25C.lib
index 7693e7e0..d6fc30aa 100644
--- a/compiler/tests/golden/sram_2_16_1_scn4m_subm_TT_5p0V_25C.lib
+++ b/compiler/tests/golden/sram_2_16_1_scn4m_subm_TT_5p0V_25C.lib
@@ -136,7 +136,7 @@ cell (sram_2_16_1_scn4m_subm){
         timing(){ 
             timing_sense : non_unate; 
             related_pin : "clk0"; 
-            timing_type : rising_edge; 
+            timing_type : falling_edge; 
             cell_rise(CELL_TABLE) {
             values("1.556, 1.576, 1.751",\
                    "1.559, 1.579, 1.754",\
diff --git a/compiler/tests/golden/sram_2_16_1_scn4m_subm_TT_5p0V_25C_analytical.lib b/compiler/tests/golden/sram_2_16_1_scn4m_subm_TT_5p0V_25C_analytical.lib
index 963c15c5..5c56ab1e 100644
--- a/compiler/tests/golden/sram_2_16_1_scn4m_subm_TT_5p0V_25C_analytical.lib
+++ b/compiler/tests/golden/sram_2_16_1_scn4m_subm_TT_5p0V_25C_analytical.lib
@@ -136,7 +136,7 @@ cell (sram_2_16_1_scn4m_subm){
         timing(){ 
             timing_sense : non_unate; 
             related_pin : "clk0"; 
-            timing_type : rising_edge; 
+            timing_type : falling_edge; 
             cell_rise(CELL_TABLE) {
             values("0.268, 0.268, 0.268",\
                    "0.268, 0.268, 0.268",\
diff --git a/compiler/tests/golden/sram_2_16_1_scn4m_subm_TT_5p0V_25C_pruned.lib b/compiler/tests/golden/sram_2_16_1_scn4m_subm_TT_5p0V_25C_pruned.lib
index c6d2fd1e..64340a5b 100644
--- a/compiler/tests/golden/sram_2_16_1_scn4m_subm_TT_5p0V_25C_pruned.lib
+++ b/compiler/tests/golden/sram_2_16_1_scn4m_subm_TT_5p0V_25C_pruned.lib
@@ -136,7 +136,7 @@ cell (sram_2_16_1_scn4m_subm){
         timing(){ 
             timing_sense : non_unate; 
             related_pin : "clk0"; 
-            timing_type : rising_edge; 
+            timing_type : falling_edge; 
             cell_rise(CELL_TABLE) {
             values("1.542, 1.562, 1.738",\
                    "1.545, 1.565, 1.741",\