* MAX253 MACROMODEL
* ------------------------------
* Revision 0, 10/2008
* ------------------------------
* The MAX253 is a monolithic oscillator/power-driver specifically designed to provide isolated power for an isolated RS-485 or RS-232 data interface.
* ------------------------------
*Note:
**       Macro model is developed using the typical device parameters given in the data sheet with 5 volts power supply.  Model does not take care of the device non-linearity with temperature variations.  Model characteristics may not match actual device behavior at abnormal operating conditions.
* ------------------------------
* Connections
*      1  = D1
*      2  = GND1
*      3  = FS
*      4  = SD
*      5  = N.C
*      6  = Vcc
*      7  = GND2
*      8  = D2
****************
.subckt MAX253 1 2 3 4 5 6 7 8

D_MAX253_D3         MAX253_N12511147 MAX253_N125271341 diodemacro_ideal 
I_MAX253_I4         6 7 DC 0.4uA  
D_MAX253_CO10_D2         7 MAX253_SDR diodemacro_mostideal 
G_MAX253_CO10_G1         MAX253_SDR 7 4 VREF -1E6
D_MAX253_CO10_D1         MAX253_SDR VDD diodemacro_mostideal 
D_MAX253_D4         MAX253_N125272000 MAX253_N12511147 diodemacro_ideal 
V_MAX253_V2         MAX253_N12501179 7  
+PULSE 1 0 0 10n 10n 1.4286u 2.8572u
M_MAX253_M4         8 MAX253_N12510516 7 7 NHVT L=1u W=1.6m
M_MAX253_M2         MAX253_N12501179 MAX253_FSR MAX253_N12500961 7 NCHJ L=1u
+  W=525u
G_MAX253_G2         6 7 MAX253_SDR 7 -0.9E-4
R_MAX253_R6         MAX253_N125272000 MAX253_N12510451  0.5  
M_MAX253_M6         MAX253_N12510516 MAX253_SDR 7 7 NJNT L=1u W=2u
E_MAX253_E2         MAX253_N12510705 7 6 MAX253_N12511147 1
R_MAX253_R7         MAX253_N125270721 MAX253_N12510516  6  
C_MAX253_C3         7 MAX253_N12510516  5n  
D_MAX253_D1         MAX253_N12510705 MAX253_N125270721 diodemacro_ideal 
R_MAX253_R1         3 VDD  1000G  
E_MAX253_E1         MAX253_FSRN 7 VDD MAX253_FSR 1
D_MAX253_D2         MAX253_N125270920 MAX253_N12510705 diodemacro_ideal 
E_MAX253_E2P1         MAX253_N12511147 7 POLY(2) 6 7 MAX253_N12500961 7 0 0 0 0
+  1
I_MAX253_I3         3 7 DC 10pA  
I_MAX253_I5         6 7 DC 0.45mA  
R_MAX253_R4         MAX253_N125270920 MAX253_N12510516  0.5  
M_MAX253_M3         1 MAX253_N12510451 7 7 NHVT L=1u W=1.6m
V_MAX253_V4         VDD 7 5V
G_MAX253_G1         3 7 MAX253_FSRN 7 10E-6
R_MAX253_R5         MAX253_N125271341 MAX253_N12510451  6  
V_MAX253_V3         VREF 7 1.6V
M_MAX253_M5         MAX253_N12510451 MAX253_SDR 7 7 NJNT L=1u W=2u
D_MAX253_CO9_D2         7 MAX253_FSR diodemacro_mostideal 
G_MAX253_CO9_G1         MAX253_FSR 7 3 VREF -1E6
D_MAX253_CO9_D1         MAX253_FSR VDD diodemacro_mostideal 
C_MAX253_C1         7 MAX253_N12510451  5n  
V_MAX253_V1         MAX253_N12501169 7  
+PULSE 1 0 0 10n 10n 2.5u 5u
M_MAX253_M1         MAX253_N12501169 MAX253_FSRN MAX253_N12500961 7 NCHJ L=1u
+  W=525u
I_MAX253_I1         4 7 DC 10pA  
******************
.model diodemacro_ideal d(n=0.001)
.model diodemacro_mostideal d(IS=1E-12 N=0.000001 BV=35 IBV=1)
.model NJNT nmos(VTO=0.5 KP=50E-2) 
.model NCHJ nmos(VTO=0.5 KP=100E-6 CGSo=3E-9)
.model NHVT nmos(VTO=1.0 KP=100E-6)
.ends MAX253
******************