1.35W 70mA Integrated Gate Drivers Non Inverting MAX4820EUP+T Maxim

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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