The important chips on the Antminer V3.76 version S9 hash board

Common chips on the Antminer hash board include ASIC chip, temperature sensor chip, MOS tube chip, PIC chip, EEPROM chip, etc. This article will take the hash board of Antminer S9 V3.76 as an example to explain the positions and functions of various chips.

ASIC chip: Antminer BM1387B

A single S9 hash board has a total of 63 BM1387 ASIC chips, which are researched by the SHA256 algorithm and are mainly responsible for the hash rate calculation of the whole miner.

U1: controller chip LM27402S

LM27402S is a new original high performance controller with DCR current sensing function, suitable for hash board maintenance. Current sensing is facilitated by improving overall efficiency, resulting in high accuracy and low voltage capability.

U3: Microcontroller PIC16F1704

PIC16F1704 microcontroller can be used for maintenance of Antminer S9 hash board. The microcontroller has a minimum operating temperature of -40°C and a maximum of 85°C.

Q1, Q3, Q4, Q5: MOS Chip TPHR9003NL 

When the miner cannot recognize the hash board and the test fixture cannot recognize the hash, you can check whether the chip's voltage is normal. Under normal circumstances, the voltage is unstable, and the lightning surge will cause damage to the MOS.

U89: T451 temperature sensor 

The temperature sensor chip is mainly used to sense the temperature of the hash board. If the temperature sensor chip is damaged, it will cause abnormal temperature readings, the hash board will not start when the temperature is too low, or the miner will stop running when it is too high.

U77: LN1134A182MR-G 4VK4

The LN1134A182MR-G is a high-speed, low-dropout, high-precision output voltage, low-current-consumption positive-voltage voltage regulator developed using CMOS technology. Due to the built-in low on-resistance transistor, the differential pressure is low, and a larger output current can be obtained.

U7: Regulator DD7R 

The BL9198 DD7R is designed for portable RF and wireless applications with demanding performance and space requirements. Performance is optimized for battery-powered systems, delivering ultra-low noise and low quiescent current.

U88: Converter CT1F

SN74LVC1T45DBVR CT1F is a dual power bus transceiver chip IC.

Antminer S9 hash board chip summary:

It is because of the cooperative operation of the above chips that the S9 hash board can run normally. If one fails, it will lead to a decrease in the miner's hash rate or a problem of 0 hash rate. For details about S9 hash board failures, please refer to Antminer S9 Hash Board Repair Guide.