MAX4820EUP+T 100% Original

1.General Description.

The MAX4820/MAX4821 8-channel relay drivers offerbuilt-in kickback protection and drive +3.3V/+5V non-latching or dual-coil-latching relays. These devices areespecially useful when driving +3V relays. Each inde-pendent open-drain output features a 2Ωon-resistanceand is guaranteed to sink 70mA (min) of load current.Both devices consume less than 50μA (max) quiescentcurrent and have 1μA output off-leakage current.
The MAX4820 features an SPI™-/QSPI™-/MICROWIRE™-compatible serial interface. Input data is shifted into an 8-bit shift register and latched to the outputs when CStransitions from low to high. Each data bit in the shift reg-ister corresponds to a specific output, allowing indepen-dent control of all outputs.
The MAX4821 features a 4-bit (A0, A1, A2, LVL) paral-lel-input interface. The first three bits (A0, A1, A2) deter-mine the output address, and the fourth bit (LVL)determines whether the selected output is switched onor off. Data is latched to the outputs when CStransi-tions from low to high.
Both devices feature separate set and reset functionsthat allow the user to turn on or turn off all outputs simul-taneously with a single control line. Built-in hysteresis(Schmidt trigger) on all digital inputs allows this deviceto be used with slow rising and falling signals, such asthose from optocouplers or RC power-up initializationcircuits. The MAX4820/MAX4821 are available in 20-pinTSSOP and space-saving 20-pin Thin QFN packages.

2.Features

♦ 8 Independent Output Channels
♦ Built-In Inductive Kickback Protection
♦ Drive +3V and +5V Relays
♦ Guaranteed 70mA (min) Coil Drive Current
♦ SETFunction to Turn On All OutputsSimultaneously
♦ RESETFunction to Turn Off All OutputsSimultaneously
♦ SPI-/QSPI-/MICROWIRE-Compatible SerialInterface (MAX4820)
♦ Serial Digital Output for Daisy Chaining(MAX4820)
♦ Parallel Interface (MAX4821)
♦ Low 50μA (max) Quiescent Supply Current
♦ Space-Saving 20-Pin Thin QFN Package

3.Ordering Information

4.Pin Configurations

6.Pin Configurations (continued)

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Shenzhen Hongxinwei Technology Co., Ltd is located in the Bao’an District of Shenzhen.It is a high-tech enterprise setting research and development, production, sales into an integration. The company covers an area of 15 acres, having modern producing workshop and professional production and testing equipments. The company has an existing staff of more than 100 people.The company has set up offices in Shenzhen, Hongkong and Singapore providing worldwide service.