ML145583

ML145583 3.3 Volt Only Driver/Receiver with an Integrated Standby Mode RS 232/EIA–232–E and CCITT V.28 Legacy Device: Motorola MC145583 The ML145583 is a CMOS transceiver composed of three drivers and five receivers that fulfills the electrical specifications of EIA–232–E, EIA–562, and CCITT V while operating from a single + 3.3 or + 5.0 V .28 power supply. This transceiver is a high–performance, low–power consumption device that is equipped with a standby function. A voltage tripler and inverter converts the + 3.3 V to ± 8.8 V or a volt, age doubler and inverter converts the + 5.0 V to ± 8.8 V This is accom. plished through an on–chip 40 kHz oscillator and five inexpensive external capacitors. FEATURES Drivers: • ± 5 V Minimum Output Swing at 3.3 or 5.0 V Power Supply • 300 Ω Power–Off Impedance • Output Current Limiting • Three–State Outputs During Standby Mode C5+ 28 1 SOIC 28W = -7P SOG PACKAGE CASE 751F PACKAGE SOIC 28W MOTOROLA MC145583DW LANSDALE ML145583-7P Note: Lansdale lead free (Pb) product, as it becomes available, will be identified by a part number prefix change from ML to MLE. PIN ASSIGNMENT 1 2 3 4 5 6 7 8 9 10 11 12 13 14 RING MONITOR CIRCUIT (INVERTING) 28 27 26 25 24 23 22 21 20 19 18 17 16 15 C2+ VCC C2– C1+ C1– VDD DO1 DO2 DO3 DI1 DO4 DI2 DO5 DI3 Receivers: • ± 25 V Input Range • 3 to 7 kΩ Input Impedance • 0.8 V Hysteresis for Enhanced Noise Immunity • Three–State Outputs During Standby Mode Ring Monitor Circuit: • Invert the Input Level on Rx1 to Logic Output Level on RIMON at Standby Mode GND C5– RIMON VSS STB Rx1 Rx2 Rx3 Tx1 Rx4 Tx2 Rx5 Tx3 Page 1 of 7 www.lansdale.com Issue A ML145583 FUNCTION DIAGRAM CHARGE PUMPS OSC LANSDALE Semiconductor, Inc. VCC VOLTAGE TRIPLER VOLTAGE INVERTER GND C3 + C1 + C4 VDD C2 C5+ + C5 C5– VSS C1– C1+ C2– + C2+ ** RECEIVER VDD * 15 kΩ + – 5.4 kΩ STB VCC DO 1.0 V TURN OFF * Protection Circuit. ** Capacitors C1 and C2 are replaced by a 1 µF capacitor at VCC = 5.0 V supply. DRIVER VDD STB 1.8 V TURN ON VCC Tx 300 Ω LEVEL SHIFTER + – DI 1.4 V VSS Page 2 of 7 www.lansdale.com Issue A LANSDALE Semiconductor, Inc. ML145583 MAXIMUM RATINGS (Voltage polarities referenced to GND) Rating DC Supply Voltage Input Voltage DC Current per Pin Power Dissipation Operating Temperature Range Storage Temperature Range Rx1 – Rx5 Inputs DI1 – DI3 Inputs Symbol VCC VIR I PD TA Tstg Value – 0.5 to + 6.0 VSS – 15 to VDD + 15 – 0.5 to VCC + 0.5 ± 100 1 – 40 to + 85 – 85 to + 150 Unit V V mA W °C °C This device contains protection circuitry to guard against damage due to high static voltages or electric fields. However, precautions must be taken to avoid applications of any voltage higher than maximum rated voltages to this high–impedance circuit. For proper operation, it is recommended that the voltage at the DI and DO pins be constrained to the range GND ≤ VDI ≤ VCC and GND ≤ VDO ≤ VCC. Also, the voltage at the Rx pin should be constrained to (VSS – 15 V) ≤ VRx1 – Rx5 ≤ (VDD + 15 V), and Tx should be constrained to VSS ≤ VTx1 – Tx3 ≤ VDD. Unused inputs must always be tied to an appropriate logic voltage level (e.g., GND or VCC for DI, and GND for Rx). Min 3.0 4.5 – 40 Typ 3.3 5.0 — Max 3.6 5.5 85 Unit V °C RECOMMENDED OPERATING LIMITS Parameter Power Supply Operating Temperature Range * Capacitors C1 and C2 are replaced by a 1 µF capacitor at VCC = 5 V. Symbol VCC VCC* TA DC ELECTRICAL CHARACTERISTICS (Voltage polarities referenced to GND = 0 V; C1 – C5 = 1 µF; TA = 25°C) Parameter DC Power Supply Quiescent Supply Current (Output Unloaded, Input Low) Quiescent Supply Current (Standby Mode; STB = 1, Output Unloaded) Control Signal Input Voltage (STB) Control Signal Input Current (STB) Charge Pumps Output Voltage (VCC = 3 V; C1, C2, C3, C4, C5 = 1 µF) Output Voltage (VDD) Iload = 0 mA Iload = 6 mA Output Voltage (VSS) Iload = 0 mA Iload = 6 mA Symbol VCC ICC ICC(STB) VIL VIH IIL IIH VDD 8.5 7.5 VSS — — 8.8 7.9 – 8.8 – 7.8 — — – 8.5 – 7.0 Min 3.0 — — — VCC – 0.5 — — Typ 3.3 2.8