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When automotive chips are out of stock, it greatly affects the production schedule. What most people are concerned about is whether there is a replacement model for the chip. How to find a replacement model?
Regarding S9S12XS128J1MAA, there are three alternatives that you can choose from without changing the chip pin position and brand.
1: Larger memory, worry-free overwriting replacement.
S9S12XS128J1MAA：
| Product attributes | |
TYPE | DESCRIPTION |
| category | Integrated Circuits (lCs)EmbeddedMicrocontroller |
| manufacturer | NXP USA Inc. |
| series | HCS12X |
wrap | tray  |
| Part status | Sale |
| DigiKey is programmable | Not verified |
| Core processors | HCS12X |
| Kernel specifications | 16-bit |
| velocity | 40MHZ |
| Connectivity | CANbus, SCl, SPI |
| peripheral | LVD，POR, PWM,WDT |
| Number of l/o | 59 |
Program storage capacity | 128KB(128Kx8) |
| The type of program memory | flash memory |
| EEPROM capacity | |
RAM size | 8Kx 8 |
| Voltage -Power Supply (Vcc/vdd) | 1.72V~ 5.5V |
| Data converters | A/D 8x12b |
| Oscillator type | exterior |
| Operating temperature | -40℃~125℃(TA) |
| Installation type | Surface mount type |
| Supplier device package | 80-QFP(14x14) |
| Package/Case | 80-QFP |
| Basic product number | S9S12 |
S9S12XS256J1MAAR：
| Product attributes | |
TYPE | DESCRIPTION |
| category | Integrated Circuits (lCs)EmbeddedMicrocontroller |
| manufacturer | NXP USA Inc. |
| series | HCS12X |
wrap | Tape & Reel (TR) |
| Part status | Sale |
| DigiKey is programmable | Not verified |
| Core processors | HCS12X |
| Kernel specifications | 16-bit |
| velocity | 40MHZ |
| Connectivity | CANbus, SCl, SPI |
| peripheral | LVD，POR, PWM,WDT |
| Number of l/o | 59 |
Program storage capacity | 256KB(256Kx8) |
| The type of program memory | flash memory |
| EEPROM capacity | |
RAM size | 12Kx 8 |
| Voltage -Power Supply (Vcc/vdd) | 1.72V~ 5.5V |
| Data converters | A/D 8x12b |
| Oscillator type | exterior |
| Operating temperature | -40℃~125℃(TA) |
| Installation type | Surface mount type |
| Supplier device package | 80-QFP(14x14) |
| Package/Case | 80-QFP |
| Basic product number | S9S12 |
Let’s talk about the first one, which is to replace it with larger memory. The largest memory of the S9S12XS series is XS256. From these two comparison pictures, we can see that the other parameters of the
two models are the same. The difference is that The memory of XS256 is 256kb, which is twice as much memory as the 128KB of xs128. There is no problem in replacing it.
2: Lower temperature resistance, suitable for products with low temperature requirements.
S9S12XS128J1MAA:
| Product attributes | |
TYPE | DESCRIPTION |
| category | Integrated Circuits (lCs)EmbeddedMicrocontroller |
| manufacturer | NXP USA Inc. |
| series | HCS12X |
wrap | tray |
| Part status | Sale |
| DigiKey is programmable | Not verified |
| Core processors | HCS12X |
| Kernel specifications | 16-bit |
| velocity | 40MHZ |
| Connectivity | CANbus, SCl, SPI |
| peripheral | LVD，POR, PWM,WDT |
| Number of l/o | 59 |
Program storage capacity | 128KB(128Kx8) |
| The type of program memory | flash memory |
| EEPROM capacity | |
RAM size | 8Kx 8 |
| Voltage -Power Supply (Vcc/vdd) | 1.72V~ 5.5V |
| Data converters | A/D 8x12b |
| Oscillator type | exterior |
| Operating temperature | -40℃~125℃(TA) |
| Installation type | Surface mount type |
| Supplier device package | 80-QFP(14x14) |
| Package/Case | 80-QFP |
| Basic product number | S9S12 |
S9S12XS128J1VAA:
| Product attributes | |
TYPE | DESCRIPTION |
| category | Integrated Circuits (lCs)EmbeddedMicrocontroller |
| manufacturer | NXP USA Inc. |
| series | HCS12X |
wrap | tray |
| Part status | Sale |
| DigiKey is programmable | Not verified |
| Core processors | HCS12X |
| Kernel specifications | 16-bit |
| velocity | 40MHZ |
| Connectivity | CANbus, SCl, SPI |
| peripheral | LVD，POR, PWM,WDT |
| Number of l/o | 59 |
Program storage capacity | 128KB(128Kx8) |
| The type of program memory | flash memory |
| EEPROM capacity | |
RAM size | 8Kx 8 |
| Voltage -Power Supply (Vcc/vdd) | 1.72V~ 5.5V |
| Data converters | A/D 8x12b |
| Oscillator type | exterior |
| Operating temperature | -40℃~105℃(TA) |
| Installation type | Surface mount type |
| Supplier device package | 80-QFP(14x14) |
| Package/Case | 80-QFP |
| Basic product number | S9S12 |
S9S12XS128J1CAA:
The second alternative can be said to be to lower the requirements and seek alternatives. We can see that except for the difference in temperature, these three sets of models have the same parameters and can be replaced completely. The disadvantage is that the temperature requirements cannot be too high. S9S12XS128J1 provides three suffixes: CAA VAA MAA, which are different temperatures, CAA 85 °C VAA 105 °C MAA 125°. For those who are out of stock and can’t find the goods, if the temperature requirements are not so high , you can cross to see if there is any supply.
3: Smaller memory, suitable for products that cannot make full use of XS128 memory.
S9S12XS64J1MAA：
S9S12XS128J1MAA：
The third option is also to lower the requirements and compress the memory instead. Let’s take a look at the other parameters of these two models. They are the same except for the memory size. For products with a storage capacity of 128kB, we often see one solution used in different categories of products. When individual products are relatively simple and have small storage, we can consider using a 64KB model instead.
https://www.youtube.com/watch?v=wV759KfDe9s
