DATASHEET ISL3295E, ISL3298E FN6544 Rev.4.00 16.5kV ESD Protected, +125C, 3.0V to 5.5V, SOT-23/TDFN Packaged, Low Oct 9, 2019 Power, RS-485/RS-422 Transmitters The ISL3295E and ISL3298E are 16.5kV HBM ESD Protected Features (7kV IEC61000 contact), 3.0V to 5.5V powered, single High ESD protection on RS-485 outputs 16.5kV HBM transmitters for balanced communication using the RS-485 and RS-422 standards. These drivers have very low output - IEC61000-4-2 contact test method . 7kV leakage current (40A), so they present less than a 1/8 unit - Class 3 ESD level on all other pins >8kV HBM load to the RS-485 bus. This allows more than 256 Specified for +125C operation (V 3.6V only) CC transmitters on the network without violating the RS-485 specifications 32 unit load maximum, and without using Logic supply pin (V ) eases operation in mixed supply L repeaters. systems (ISL3298E only) Hot Plug circuitry ensures that the Tx outputs remain in a high Hot plug - Tx outputs remain three-state during power-up impedance state while the power supply stabilizes. Low Tx leakage allows >256 devices on the bus Drivers on the ISL3295E and ISL3298E are not limited, so they High data rates up to 20Mbps can achieve the 20Mbps data rate. They are offered in industrial Low quiescent supply current . 150A (max) and extended industrial (-40C to +125C) temperature - Very low shutdown supply current . 1A (max) ranges. -7V to +12V common-mode output voltage range A 26% smaller footprint is available with the ISL3298E TDFN (V 3.6V only) CC package. This device also features a logic supply pin (V ) that L sets the switching points of the DE and DI inputs to be Current limiting and thermal shutdown for driver overload compatible with a lower supply voltage in mixed voltage protection (V 3.6V only) CC systems. Tri-statable Tx outputs For companion single RS-485 receivers in micro packages, 5V tolerant logic inputs when V 5V CC please see the ISL3280E, ISL3281E, ISL3282E, ISL3283E, Pb-free (RoHS compliant) ISL3284E datasheet. Related Literature Applications For a full list of related documents, visit our website Clock distribution ISL3295E and ISL3298E device pages High node count systems Space constrained systems Security camera networks Building environmental control/lighting systems Industrial/process control networks TABLE 1. SUMMARY OF FEATURES DATA TX MAXIMUM RATE SLEW RATE HOT V ENABLE QUIESCENT LOW POWER PIN L PART NUMBER FUNCTION (Mbps) LIMITED PLUG PIN (Note 11) I (A) SHUTDOWN COUNT CC ISL3295E 1 Tx 20 NO YES NO YES 150 YES 6 Ld SOT ISL3298E 1 Tx 20 NO YES YES YES 150 YES 8 Ld TDFN FN6544 Rev.4.00 Page 1 of 17 Oct 9, 2019ISL3295E, ISL3298E Pin Configurations ISL3295E ISL3298E (6 LD SOT-23) (8 LD TDFN) TOP VIEW TOP VIEW DI 1 6 Y V V 1 8 L CC V 2 D 5 GND CC DE 2 7 Z DE 3 4 Z DI 3 D 6 Y GND 4 5 GND NOTE: BOTH GND PINS MUST BE CONNECTED Truth Tables Pin Descriptions TRANSMITTING PIN NAME FUNCTION INPUTS OUTPUTS DE Driver output enable. The driver outputs, Y and Z, are enabled by DE (Note 11)DI Z Y bringing DE high, and are high impedance when DE is low. If the driver enable function isnt needed, connect DE to V (or V ) 1 101 CC L through a 1k to 3k resistor. 1 010 DI Driver input. A low on DI forces output Y low and output Z high. 0X High-Z * High-Z * Similarly, a high on DI forces output Y high and output Z low. NOTE: *Shutdown Mode GND Ground connection. This is also the potential of the TDFN thermal pad. Y 15kV HBM, 7kV IEC61000 (contact method) ESD Protected RS-485/422 level, noninverting transmitter output. Z 15kV HBM, 7kV IEC61000 (contact method) ESD Protected RS-485/422 level, inverting transmitter output. V System power supply input (3.0V to 5.5V). On devices with a V CC L pin powered from a separate supply, power-up V first. CC V Logic-level supply which sets the V /V levels for the DI and DE L IL IH pins (ISL3298E only). If V and V are different supplies, L CC power-up this supply after V , and keep V V . CC L CC FN6544 Rev.4.00 Page 2 of 17 Oct 9, 2019