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MAX17841B

Automotive SPI Communication Interface (ASCI)

Enables Robust Daisy-Chain EMC/EMI Performance and Cost Effective Isolation Solution

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Overview

Description

The MAX17841B ASCI combines an SPI port with a universal asynchronous receiver transmitter (UART) specially designed to interface with Maxim battery management devices.

The UART can be configured to automatically perform Manchester encoding/decoding, message framing, parity, wake-up, and keep-alive signaling as required for Maxim’s battery management UART protocol.

The UART has programmable baud rates of 0.5Mbps, 1Mbps, or 2Mbps and supports either single-ended or differential signaling. For host efficiency, the UART contains a 28-byte transmit buffer and a 62-byte receive buffer with host-configurable interrupt events.

MAX17841B: Simplified Operating Circuit

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Key Features

Supports Maxim’s Battery Management UART Protocol
SPI Interface Up to 4MHz
UART Baud Rate Programmable Up to 2Mbps
3.3V or 5V Operation
Ultra-Low Quiescent Current
Transmit and Receive Buffers with Programmable Interrupts Allow for Queuing of UART Messages
Manchester Encoder and Decoder Reduces Host Controller Burden
Operating Temperature Range from -40°C to +105°C (AEC-Q100 Type 2)
Supports ASIL Requirements

Applications/Uses

Battery Management Systems (BMS)
Electric and Hybrid Vehicles (EV/HEV)
Energy Storage Systems (ESS)

Parametric Specs

See parametric specs for UART-to-SPI Bridge (1)

Part Number

µP I/F

Channels

I_CC
(mA)

V_SUPPLY
(V)

Oper. Temp.
(°C)

Package/Pins

Budgetary
Price

typ

See Notes

MAX17841B

SPI

2.3

3.3

-40 to +105

TSSOP/16

$3.26 @1k

Pricing Notes:

This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Design Resources

MAX17841EVMINIQU: Evaluation Kit for the MAX17841B

Quality And Environmental

Request Reliability Report for: MAX17841B

Device	Fab Process	Technology	Sample size	Rejects	FIT at 25°C	FIT at 55°C	Material Composition

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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