library (sram_2_16_1_freepdk45_lib){
    delay_model : "table_lookup";
    time_unit : "1ns" ;
    voltage_unit : "1v" ;
    current_unit : "1mA" ;
    resistance_unit : "1kohm" ;
    capacitive_load_unit(1 ,fF) ;
    leakage_power_unit : "1mW" ;
    pulling_resistance_unit :"1kohm" ;
    operating_conditions(TT){
    voltage : 1.0 ;
    temperature : 25.000 ;
    }

    input_threshold_pct_fall       :  50.0 ;
    output_threshold_pct_fall      :  50.0 ;
    input_threshold_pct_rise       :  50.0 ;
    output_threshold_pct_rise      :  50.0 ;
    slew_lower_threshold_pct_fall  :  10.0 ;
    slew_upper_threshold_pct_fall  :  90.0 ;
    slew_lower_threshold_pct_rise  :  10.0 ;
    slew_upper_threshold_pct_rise  :  90.0 ;

    default_cell_leakage_power    : 0.0 ;
    default_leakage_power_density : 0.0 ;
    default_input_pin_cap    : 1.0 ;
    default_inout_pin_cap    : 1.0 ;
    default_output_pin_cap   : 0.0 ;
    default_max_transition   : 0.5 ;
    default_fanout_load      : 1.0 ;
    default_max_fanout   : 4.0 ;
    default_connection_class : universal ;

    lu_table_template(CELL_TABLE){
        variable_1 : input_net_transition;
        variable_2 : total_output_net_capacitance;
        index_1("0.00125, 0.005, 0.04");
        index_2("0.052275, 0.2091, 1.6728");
    }

    lu_table_template(CONSTRAINT_TABLE){
        variable_1 : related_pin_transition;
        variable_2 : constrained_pin_transition;
        index_1("0.00125, 0.005, 0.04");
        index_2("0.00125, 0.005, 0.04");
    }

    default_operating_conditions : TT; 


    type (DATA){
    base_type : array;
    data_type : bit;
    bit_width : 2;
    bit_from : 0;
    bit_to : 1;
    }

    type (ADDR){
    base_type : array;
    data_type : bit;
    bit_width : 4;
    bit_from : 0;
    bit_to : 3;
    }

cell (sram_2_16_1_freepdk45){
    memory(){ 
    type : ram;
    address_width : 4;
    word_width : 2;
    }
    interface_timing : true;
    dont_use  : true;
    map_only   : true;
    dont_touch : true;
    area : 0.023625;

    bus(DATA){
        bus_type  : DATA; 
        direction  : inout; 
        max_capacitance : 1.6728;  
        three_state : "!OEb & !clk"; 
        memory_write(){ 
            address : ADDR; 
            clocked_on  : clk; 
        }
        memory_read(){ 
            address : ADDR; 
        }
        pin(DATA[1:0]){
        internal_power(){
            when : "OEb & !clk"; 
            rise_power(scalar){
                values("0.027781");
            }
            fall_power(scalar){
                values("0.026752");
            }
        }
        timing(){ 
            timing_type : setup_rising; 
            related_pin  : "clk"; 
            rise_constraint(CONSTRAINT_TABLE) {
            values("0.009, 0.015, 0.027",\
                   "0.009, 0.015, 0.027",\
                   "0.009, 0.015, 0.027");
            }
            fall_constraint(CONSTRAINT_TABLE) {
            values("0.009, 0.009, 0.015",\
                   "0.009, 0.009, 0.015",\
                   "0.009, 0.009, 0.015");
            }
        }
        timing(){ 
            timing_type : hold_rising; 
            related_pin  : "clk"; 
            rise_constraint(CONSTRAINT_TABLE) {
            values("0.002, 0.002, -0.004",\
                   "0.002, 0.002, -0.004",\
                   "0.002, 0.002, -0.004");
              }
            fall_constraint(CONSTRAINT_TABLE) {
            values("-0.004, -0.004, -0.016",\
                   "-0.004, -0.004, -0.016",\
                   "-0.004, -0.004, -0.016");
            }
        }
        internal_power(){
            when : "!OEb & !clk"; 
            rise_power(scalar){
                values("0.031198");
            }
            fall_power(scalar){
                values("0.031252");
            }
        }
        timing(){ 
            timing_sense : non_unate; 
            related_pin : "clk"; 
            timing_type : falling_edge; 
            cell_rise(CELL_TABLE) {
            values("0.046, 0.047, 0.054",\
                   "0.047, 0.047, 0.054",\
                   "0.052, 0.052, 0.059");
            }
            cell_fall(CELL_TABLE) {
            values("0.132, 0.133, 0.142",\
                   "0.133, 0.134, 0.142",\
                   "0.138, 0.139, 0.147");
            }
        rise_transition(CELL_TABLE) {
            values("0.014, 0.015, 0.027",\
                   "0.014, 0.015, 0.027",\
                   "0.014, 0.015, 0.027");
              }
        fall_transition(CELL_TABLE) {
            values("0.018, 0.02, 0.036",\
                   "0.019, 0.02, 0.036",\
                   "0.019, 0.02, 0.036");
            }
        }
        }
    }

    bus(ADDR){
        bus_type  : ADDR; 
        direction  : input; 
        capacitance : 0.2091;  
        max_transition       : 0.04;
        fanout_load          : 1.000000;
        pin(ADDR[3:0]){
        timing(){ 
            timing_type : setup_rising; 
            related_pin  : "clk"; 
            rise_constraint(CONSTRAINT_TABLE) {
            values("0.009, 0.015, 0.027",\
                   "0.009, 0.015, 0.027",\
                   "0.009, 0.015, 0.027");
            }
            fall_constraint(CONSTRAINT_TABLE) {
            values("0.009, 0.009, 0.015",\
                   "0.009, 0.009, 0.015",\
                   "0.009, 0.009, 0.015");
            }
        }
        timing(){ 
            timing_type : hold_rising; 
            related_pin  : "clk"; 
            rise_constraint(CONSTRAINT_TABLE) {
            values("0.002, 0.002, -0.004",\
                   "0.002, 0.002, -0.004",\
                   "0.002, 0.002, -0.004");
              }
            fall_constraint(CONSTRAINT_TABLE) {
            values("-0.004, -0.004, -0.016",\
                   "-0.004, -0.004, -0.016",\
                   "-0.004, -0.004, -0.016");
            }
        }
        }
    }

    pin(CSb){
        direction  : input; 
        capacitance : 0.2091;  
        timing(){ 
            timing_type : setup_rising; 
            related_pin  : "clk"; 
            rise_constraint(CONSTRAINT_TABLE) {
            values("0.009, 0.015, 0.027",\
                   "0.009, 0.015, 0.027",\
                   "0.009, 0.015, 0.027");
            }
            fall_constraint(CONSTRAINT_TABLE) {
            values("0.009, 0.009, 0.015",\
                   "0.009, 0.009, 0.015",\
                   "0.009, 0.009, 0.015");
            }
        }
        timing(){ 
            timing_type : hold_rising; 
            related_pin  : "clk"; 
            rise_constraint(CONSTRAINT_TABLE) {
            values("0.002, 0.002, -0.004",\
                   "0.002, 0.002, -0.004",\
                   "0.002, 0.002, -0.004");
              }
            fall_constraint(CONSTRAINT_TABLE) {
            values("-0.004, -0.004, -0.016",\
                   "-0.004, -0.004, -0.016",\
                   "-0.004, -0.004, -0.016");
            }
        }
    }

    pin(OEb){
        direction  : input; 
        capacitance : 0.2091;  
        timing(){ 
            timing_type : setup_rising; 
            related_pin  : "clk"; 
            rise_constraint(CONSTRAINT_TABLE) {
            values("0.009, 0.015, 0.027",\
                   "0.009, 0.015, 0.027",\
                   "0.009, 0.015, 0.027");
            }
            fall_constraint(CONSTRAINT_TABLE) {
            values("0.009, 0.009, 0.015",\
                   "0.009, 0.009, 0.015",\
                   "0.009, 0.009, 0.015");
            }
        }
        timing(){ 
            timing_type : hold_rising; 
            related_pin  : "clk"; 
            rise_constraint(CONSTRAINT_TABLE) {
            values("0.002, 0.002, -0.004",\
                   "0.002, 0.002, -0.004",\
                   "0.002, 0.002, -0.004");
              }
            fall_constraint(CONSTRAINT_TABLE) {
            values("-0.004, -0.004, -0.016",\
                   "-0.004, -0.004, -0.016",\
                   "-0.004, -0.004, -0.016");
            }
        }
    }

    pin(WEb){
        direction  : input; 
        capacitance : 0.2091;  
        timing(){ 
            timing_type : setup_rising; 
            related_pin  : "clk"; 
            rise_constraint(CONSTRAINT_TABLE) {
            values("0.009, 0.015, 0.027",\
                   "0.009, 0.015, 0.027",\
                   "0.009, 0.015, 0.027");
            }
            fall_constraint(CONSTRAINT_TABLE) {
            values("0.009, 0.009, 0.015",\
                   "0.009, 0.009, 0.015",\
                   "0.009, 0.009, 0.015");
            }
        }
        timing(){ 
            timing_type : hold_rising; 
            related_pin  : "clk"; 
            rise_constraint(CONSTRAINT_TABLE) {
            values("0.002, 0.002, -0.004",\
                   "0.002, 0.002, -0.004",\
                   "0.002, 0.002, -0.004");
              }
            fall_constraint(CONSTRAINT_TABLE) {
            values("-0.004, -0.004, -0.016",\
                   "-0.004, -0.004, -0.016",\
                   "-0.004, -0.004, -0.016");
            }
        }
    }

    pin(clk){
        clock             : true;
        direction  : input; 
        capacitance : 0.2091;  
        timing(){ 
            timing_type :"min_pulse_width"; 
            related_pin  : clk; 
            rise_constraint(scalar) {
                values("0.1955"); 
            }
            fall_constraint(scalar) {
                values("0.1955"); 
            }
         }
        timing(){ 
            timing_type :"minimum_period"; 
            related_pin  : clk; 
            rise_constraint(scalar) {
                values("0.391"); 
            }
            fall_constraint(scalar) {
                values("0.391"); 
            }
         }
    }
    }
}