diff --git a/compiler/characterizer/lib.py b/compiler/characterizer/lib.py
index b8880717f..ae94a200f 100644
--- a/compiler/characterizer/lib.py
+++ b/compiler/characterizer/lib.py
@@ -281,7 +281,7 @@ def write_defaults(self):
         self.lib.write("    default_input_pin_cap    : 1.0 ;\n")
         self.lib.write("    default_inout_pin_cap    : 1.0 ;\n")
         self.lib.write("    default_output_pin_cap   : 0.0 ;\n")
-        self.lib.write("    default_max_transition   : 0.5 ;\n")
+        self.lib.write("    default_max_transition   : {} ;\n".format(OPTS.max_transition))
         self.lib.write("    default_fanout_load      : 1.0 ;\n")
         self.lib.write("    default_max_fanout   : 4.0 ;\n")
         self.lib.write("    default_connection_class : universal ;\n\n")
@@ -484,7 +484,8 @@ def write_addr_bus(self, port):
         self.lib.write("        bus_type  : addr; \n")
         self.lib.write("        direction  : input; \n")
         self.lib.write("        capacitance : {0};  \n".format(tech.spice["dff_in_cap"]/1000))
-        self.lib.write("        max_transition       : {0};\n".format(self.slews[-1]))
+        max_transition = max(OPTS.max_transition, self.slews[-1])
+        self.lib.write("        max_transition       : {0};\n".format(max_transition))
         self.lib.write("        pin(addr{0}[{1}:0])".format(port,self.sram.addr_size-1))
         self.lib.write("{\n")
 
@@ -499,7 +500,8 @@ def write_wmask_bus(self, port):
         self.lib.write("        bus_type  : wmask; \n")
         self.lib.write("        direction  : input; \n")
         self.lib.write("        capacitance : {0};  \n".format(tech.spice["dff_in_cap"] / 1000))
-        self.lib.write("        max_transition       : {0};\n".format(self.slews[-1]))
+        max_transition = max(OPTS.max_transition, self.slews[-1])
+        self.lib.write("        max_transition       : {0};\n".format(max_transition))
         self.lib.write("        pin(wmask{0}[{1}:0])".format(port, self.sram.num_wmasks - 1))
         self.lib.write("{\n")
 
diff --git a/compiler/globals.py b/compiler/globals.py
index 98d6007ab..156249989 100644
--- a/compiler/globals.py
+++ b/compiler/globals.py
@@ -544,6 +544,12 @@ def set_default_corner():
     if (OPTS.slew_scales == ""):
         OPTS.slew_scales = [0.25, 1, 8]
 
+    # Lower bound for the max_transition emitted on input pins. A
+    # characterized slew range can be far tighter than the technology can
+    # actually drive, which produces a limit downstream STA rejects.
+    if (OPTS.max_transition == ""):
+        OPTS.max_transition = 0.5
+
 
 def import_tech():
     """ Dynamically adds the tech directory to the path and imports it. """
diff --git a/compiler/options.py b/compiler/options.py
index 229f7c3a1..15d5c16e4 100644
--- a/compiler/options.py
+++ b/compiler/options.py
@@ -43,6 +43,7 @@ class options(optparse.Values):
     process_corners = ""
     load_scales = ""
     slew_scales = ""
+    max_transition = ""
 
     # Size parameters must be specified by user in config file.
     # num_words = 0
diff --git a/compiler/tests/golden/sram_2_16_1_freepdk45_FF_1p0V_25C_analytical.lib b/compiler/tests/golden/sram_2_16_1_freepdk45_FF_1p0V_25C_analytical.lib
index b3ef0e0a3..c237dc7b3 100644
--- a/compiler/tests/golden/sram_2_16_1_freepdk45_FF_1p0V_25C_analytical.lib
+++ b/compiler/tests/golden/sram_2_16_1_freepdk45_FF_1p0V_25C_analytical.lib
@@ -177,7 +177,7 @@ cell (sram_2_16_1_freepdk45){
         bus_type  : addr; 
         direction  : input; 
         capacitance : 0.00020910000000000001;  
-        max_transition       : 0.04;
+        max_transition       : 0.5;
         pin(addr0[3:0]){
         timing(){ 
             timing_type : setup_rising; 
diff --git a/compiler/tests/golden/sram_2_16_1_freepdk45_SS_1p0V_25C_analytical.lib b/compiler/tests/golden/sram_2_16_1_freepdk45_SS_1p0V_25C_analytical.lib
index 34be4fe4e..88328de88 100644
--- a/compiler/tests/golden/sram_2_16_1_freepdk45_SS_1p0V_25C_analytical.lib
+++ b/compiler/tests/golden/sram_2_16_1_freepdk45_SS_1p0V_25C_analytical.lib
@@ -177,7 +177,7 @@ cell (sram_2_16_1_freepdk45){
         bus_type  : addr; 
         direction  : input; 
         capacitance : 0.00020910000000000001;  
-        max_transition       : 0.04;
+        max_transition       : 0.5;
         pin(addr0[3:0]){
         timing(){ 
             timing_type : setup_rising; 
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 cca9c1ed6..ce56ff8dd 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
@@ -177,7 +177,7 @@ cell (sram_2_16_1_freepdk45){
         bus_type  : addr; 
         direction  : input; 
         capacitance : 0.00020910000000000001;  
-        max_transition       : 0.04;
+        max_transition       : 0.5;
         pin(addr0[3:0]){
         timing(){ 
             timing_type : setup_rising; 
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 260288929..78f8b8410 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
@@ -177,7 +177,7 @@ cell (sram_2_16_1_freepdk45){
         bus_type  : addr; 
         direction  : input; 
         capacitance : 0.00020910000000000001;  
-        max_transition       : 0.04;
+        max_transition       : 0.5;
         pin(addr0[3:0]){
         timing(){ 
             timing_type : setup_rising; 
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 5817211b2..90ff2449e 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
@@ -165,7 +165,7 @@ cell (sram_2_16_1_freepdk45){
         bus_type  : addr; 
         direction  : input; 
         capacitance : 0.2091;  
-        max_transition       : 0.04;
+        max_transition       : 0.5;
         pin(addr0[3:0]){
         timing(){ 
             timing_type : setup_rising; 
diff --git a/compiler/tests/golden/sram_2_16_1_scn4m_subm_FF_5p0V_25C_analytical.lib b/compiler/tests/golden/sram_2_16_1_scn4m_subm_FF_5p0V_25C_analytical.lib
index 6912aec73..850e3e99e 100644
--- a/compiler/tests/golden/sram_2_16_1_scn4m_subm_FF_5p0V_25C_analytical.lib
+++ b/compiler/tests/golden/sram_2_16_1_scn4m_subm_FF_5p0V_25C_analytical.lib
@@ -177,7 +177,7 @@ cell (sram_2_16_1_scn4m_subm){
         bus_type  : addr; 
         direction  : input; 
         capacitance : 0.0098242;  
-        max_transition       : 0.4;
+        max_transition       : 0.5;
         pin(addr0[3:0]){
         timing(){ 
             timing_type : setup_rising; 
diff --git a/compiler/tests/golden/sram_2_16_1_scn4m_subm_SS_5p0V_25C_analytical.lib b/compiler/tests/golden/sram_2_16_1_scn4m_subm_SS_5p0V_25C_analytical.lib
index a7605cb36..5762fa8ee 100644
--- a/compiler/tests/golden/sram_2_16_1_scn4m_subm_SS_5p0V_25C_analytical.lib
+++ b/compiler/tests/golden/sram_2_16_1_scn4m_subm_SS_5p0V_25C_analytical.lib
@@ -177,7 +177,7 @@ cell (sram_2_16_1_scn4m_subm){
         bus_type  : addr; 
         direction  : input; 
         capacitance : 0.0098242;  
-        max_transition       : 0.4;
+        max_transition       : 0.5;
         pin(addr0[3:0]){
         timing(){ 
             timing_type : setup_rising; 
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 8bec74c37..909fd826d 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
@@ -177,7 +177,7 @@ cell (sram_2_16_1_scn4m_subm){
         bus_type  : addr; 
         direction  : input; 
         capacitance : 0.0098242;  
-        max_transition       : 0.4;
+        max_transition       : 0.5;
         pin(addr0[3:0]){
         timing(){ 
             timing_type : setup_rising; 
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 8bec74c37..909fd826d 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
@@ -177,7 +177,7 @@ cell (sram_2_16_1_scn4m_subm){
         bus_type  : addr; 
         direction  : input; 
         capacitance : 0.0098242;  
-        max_transition       : 0.4;
+        max_transition       : 0.5;
         pin(addr0[3:0]){
         timing(){ 
             timing_type : setup_rising; 
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 7b649d0dd..fd2967874 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
@@ -165,7 +165,7 @@ cell (sram_2_16_1_scn4m_subm){
         bus_type  : addr; 
         direction  : input; 
         capacitance : 9.8242;  
-        max_transition       : 0.4;
+        max_transition       : 0.5;
         pin(addr0[3:0]){
         timing(){ 
             timing_type : setup_rising;