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ISL33357E Datasheet(PDF) 3 Page - Intersil Corporation |
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ISL33357E Datasheet(HTML) 3 Page - Intersil Corporation |
3 / 23 page ISL33354E, ISL33357E 3 FN8775.1 October 21, 2016 Submit Document Feedback Pin Descriptions PIN NAME PIN # for SSOP PIN # for QFN PORT/MODE FUNCTION NC - 12, 20, 32, 33, 39, 40 BOTH No Internal Connection. DNC - 21 BOTH Do not make any external connections to this pin. SHDN 21 25 BOTH A low on SHDN disables the charge pumps, disables all the outputs and places the device in low power shutdown. Internally pulled-high. SHDN = 1 for normal operation. VCC 26 31, 34 BOTH System power supply input (4.5V to 5.5V). Both pins 31 and 34 must connect to the VCC supply. GND 15 15, 16 BOTH Ground connection. QFN pins 15 and 16 must both connect to GND. This is also the potential of the QFN’s exposed metal pad (EP). *VCC 9 7, 14, 26 BOTH For proper operation, connect this lead to the VCC supply. This is not a power supply lead, so no decoupling is required. *GND 8 6, 17 BOTH For proper operation, connect this lead to GND. This is not a power supply lead. RxIN 4, 5 2, 3 1 / RS-232 RS-232 receiver input with ±15kV ESD protection. A low on RxIN forces RxOUT high; a high on RxIN forces RxOUT low. RxOUT 24, 25 29, 30 1 / RS-232 RS-232 receiver output. TxIN 22, 23 27, 28 1 / RS-232 RS-232 transmitter input. A low on TxIN drives the corresponding TxOUT high, while a high on TxIN drives the corresponding TxOUT low. TxOUT 6, 7 4, 5 1 / RS-232 RS-232 transmitter output with ±15kV ESD protection. C1+ 1 37 1 / RS-232 External charge pump capacitor is connected to this lead. C1- 2 38 1 / RS-232 External charge pump capacitor is connected to this lead. C2+ 28 36 1 / RS-232 External charge pump capacitor is connected to this lead. C2- 27 35 1 / RS-232 External charge pump capacitor is connected to this lead. V+ 3 1 1 / RS-232 Internally generated positive RS-232 transmitter supply (+6V). V- 17 19 1 / RS-232 Internally generated negative RS-232 transmitter supply (-7V). A 12 10 2 / RS-485 RS-485 noninverting receiver input with ±15kV ESD protection. B 13 11 2 / RS-485 RS-485 inverting receiver input with ±15kV ESD protection. Y 10 8 2/ RS-485 RS-485 noninverting driver output with ±15kV ESD protection. Z 11 9 2/ RS-485 RS-485 inverting driver output with ±15kV ESD protection. DI 20 24 2 / RS-485 RS-485 driver input. A low on DI forces output Y low and output Z high. RO 18 22 2 / RS-485 RS-485 receiver output: If A > B by at least -40mV, RO is high; If A < B by -200mV or more, RO is low; RO = High if A and B are unconnected (floating) or shorted together (i.e., full fail-safe). SLOW48 5 14 13 2 / RS-485 RS-485 data rate control. A low on SLOW485 selects the 115kbps RS-485 data rate (slew rate limited output transitions); a high selects the 20Mbps data rate (full speed transitions). Internally pulled-high. RE485 16 18 2/ RS-485 RS-485 active low receiver output enable. RO is enabled when RE485 is low; RO is high impedance when RE485 is high. Internally pulled low. DE485 19 23 2/ RS-485 RS-485 driver output enable (DE). The driver outputs, Y and Z, are enabled by driving DE485 high. They are high impedance when DE485 is low. Internally pulled high. EP - EP BOTH QFN exposed thermal pad (EPAD). Connect to GND. |
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