KY232LEEN

KY202,KY232 5V RS-232 Transceivers General Description Features The KY232 series devices are EIA/TIA-232 and V.28/V.24 communication interfaces achieves 1µA supply current. A proprietary, high-efficiency, dual charge-pump regulated voltage converters and a lowdropout transmitter combine to deliver true RS-232 performance. These devices can operate from a single 5V supply at the guaranteed data rate of 250k bits/sec with enhanced electrostatic discharge (ESD) protection in all RS232 I/O pins exceeding ±15kV EN61000-4-2 Air Gap Discharge and ±8kV EN61000-4-2 Contact Discharge.     Meets EIA/TIA-232F and CCITT V.28/V.24specifications for VCC at +5V ±10% Low Quiescent Current 3mA typical , 5mA max Guaranteed Standard Data Rate 250kbps Extended ESD Protection for RS-232 I/O Pins ±15kV HBM Applications       Battery-Powered And Hand-Held Applications Peripherals interface Portable Diagnostics Equipment Terminal Adapters and POS terminals Notebooks, Subnotebooks, and Palmtops Industrial and Embedded PCs Absolute Maximum Ratings (All voltages referenced to GND.) Supply Voltage VCC.................................................. -0.3V to +6V V+............................................................................ -0.3V to +7V V-............................................................................. -0.3V to +7V |V+| + |V-|................................................................................ +13V Input Voltages TxIN Power Dissipation Per Package 16-pin nSOIC (derate 10.00mW/°C above +70°C……..............720mW Operating Temperature Range ....................................... 0°C to +70°C Junction Temperature................................................................+150°C Storage Temperature Range ......................................-65°C to +150°C Lead Temperature (soldering 10s) ............................................+300°C ............................................................... -0.3V to +6V R_IN .......................................................................... ±15V Output Voltages TxOUT......................................................................... ±13.2V RxOUT .................................................-0.3V to (VCC + 0.3V) Short-Circuit Duration TxOUT ...............................................................Continuous Continuous Power Dissipation (TA = +70°C) Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Product Selection Guide PART Tx KY202E 2 KY232E 2 Rx 2 2 Data Rate (kbps) 250 250 Receiver Enable No No SHUTDOWN Enable POWERSAVE No No No No Number of Pins 16 16 KY202,KY232 Rev.1.0 KEYSEMI Proprietary Information Unauthorized Photocopy and Duplication Prohibited © 2017 KEYSEMI All Rights Reserved Package Type NSOIC NSOIC KY202,KY232 5V RS-232 Transceivers Electrical Characteristics (C1–C4 = 0.1µF, TA = TMIN to TMAX, unless otherwise noted, Typical values apply at VCC = +5.0V and TA = 25°C.) Parameters General InfolTypes Conditions TTL Logic Input TxIN, TTL Logic Output RxOUT, STATE RS-232 Input RS-232 Output Charge Pump Pin Power Pin Charge Pump Caps VCC Voltage Range DC Characteristics RxIN TxOUT C1P, C1N, C2P, C2N VCC, VGND, VDD, VSS C1P, C1N, C2P, C2N Supply Current Quiescent Supply Current, Transmitters Loaded LOGIC Input Input Threshold Low Input Threshold High Input Hysteresis Input Leakage Current LOGIC Output Output Voltage Low Output voltage High Receiver Input Input Voltage Range Input Threshold Low Input Threshold High Input Hysteresis Input Resistance Transmitter Output Output Voltage Swing Output Resistance Output Short-circuit Current Timing Characteristics Maximum Data Rate < standard speed > Transition-Region Slew Rate < standard speed > Transmitter Propatation tPLH Transmitter Propatation tPHL Transmitter Skew Receiver Propagation tPLH Receiver Propagation tPHL Receiver Skew ESD Tolerance ESD HBM ESD 1000-4-2 Contact ESD 1000-4-2 Air KY202,KY232 Rev.1.0 PWRSAVE , SD , EN typical VCC Max Unit Typ 4.5 0.1 5.0 5.5 µF V 5.0 3 5 mA 5.0 15 high ZIN 5.0 TTL Inputs = VCC /GND, RS-232 Input = float, TA = 25°VCC = +5.0V ±10%, No load on transmitter outputs TTL Inputs = VCC /GND, RS-232 Input = float, TA = 25° VCC = +5.0V , All transmitter outputs loaded with RL = 3kΩ Min TTL I/P=GND (TTL Logic Input per pin measure) 5.0 5.0 5.0 5.0 IOUT=3.2mA IOUT =-1mA 5.0 5.0 mA 0.8 2.4 0.3 ±200 V V V µA 0.4 V V +15 7 V V V V kΩ ±60 V Ω mA 3.5 5.0 5.0 5.0 5.0 5.0 -15 0.8 RL=3-7kΩ, all loaded VCC = VDD = VSS =GND, VOUT =±2V VOUT =GND 5.0 0 5.0 ±5 300 RL =3-7k, CL =50pF-1000pF, 1 DR/RC switching 5.0 250 RL =3-7k, CL =50pF-1000pF, 1 DR/RC switching 3k+1000pF, all loaded 3k+1000pF, all loaded tPHL - tPLH CL=150pF CL =150pF tPHL - tPLH 5.0 5.0 5.0 5.0 5.0 5.0 5.0 30 2 2 100 0.15 0.15 50 kbps V/µs V/µs µs µs ns µs µs ns 5.0 5.0 5.0 ±15 ±8 ±15 kV kV kV KEYSEMI CORPORATION 1.2 1.7 0.3 3 2.4 ±7 2 KY202,KY232 5V RS-232 Transceivers Detailed Description Charge-Pump The KY232’s family utilizes regulated on-chip dual charge pumps that provides output voltages of +5.5V(doubling charge pump) and -5.5V (inverting charge pump), regardless of the input voltage (VCC) over the +4.5V to +5.5V range. The charge pumps operate in a discontinuous mode: if the output voltages are less than 5.5V, the charge pumps are enabled; if the output voltages exceed 5.5V, the charge pumps are disabled. Each charge pump requires a flying capacitor (C1, C2) and a reservoir capacitor (C3, C4) to generate the V+ and V- supplies. RS-232 Transmitters The transmitters are proprietary, low dropout, inverting level translators that convert TTL/CMOS inputs to EIA/TIA-232 output levels. Coupled with the on-chip 5.5V supplies, these transmitters deliver true RS-232 levels over a wide range of single supply system voltages. on the person discharges through an arcing path to the rear panel of the system before he or she even touches the system. The Contact Discharge Method applies the ESD current directly to the EUT. This method was devised to reduce the unpredictability of the ESD arc. The discharge current rise time is constant since the energy is directly transferred without the air-gap arc inconsistencies. KEYSEMI 's RS232 transceivers meets and exceeds the minimum criteria for EN61000-4-2 with ±15kV for Air Gap Discharge and ±8kV for Contact Discharge. The circuit models in following Figures represent the typical ESD testing circuit. The CS is initially charged with the DC power supply when the first switch (SW1) is on. RS-232 Receive Now that the capacitor is charged, the second switch (SW2) is on while SW1 switches off. The KY232’s family receivers convert RS-232 signals to CMOS-logic output levels. They are contain standard inverting receivers. The voltage stored in the capacitor is then applied through RS, the current limiting resistor, onto the device under test (DUT). ESD Immunity In ESD tests, the SW2 switch is pulsed so that the device under test receives a duration of voltage. The KY232 series incorporates ruggedized ESD cells on all driver output and receiver input pins. The ESD structure is improved for more rugged applications and environments sensitive to electrostatic discharges and associated transients. The improved ESD tolerance is at least +15kV without damage nor latch-up. There are two methods within EN61000-4-2, the Air Discharge method and the Contact Discharge method. With the Air Discharge Method, an ESD voltage is applied to the equipment under test through air, which simulates an electrically charged person ready to connect a cable onto the rear of the system and the high energy potential KY202,KY232 Rev.1.0 For the Human Body Model, the current limiting resistor (RS) and the source capacitor (CS) are 1.5kΩ and 100pF, respectively. For IEC-61000-4-2, the current limiting resistor (RS) and the source capacitor (CS) are 330Ω and 150pF, respectively. The higher CS value and lower RS value in the IEC61000-4-2 model are more stringent than the Human Body Model. The larger storage capacitor injects a higher voltage to the test point when SW2 is switched on. The lower current limiting resistor increases the current charge onto the test point. KEYSEMI CORPORATION 3 KY202,KY232 5V RS-232 Transceivers KY202,KY232 Rev.1.0 KEYSEMI CORPORATION 4 KY202,KY232 5V RS-232 Transceivers Typical Application Circuits and Pin Configuration KY202,KY232 C3(OPTIONAL CONNECTION,NOTE) KY202,KY232(nSOIC) TOP VIEW KY202,KY232 Rev.1.0 KEYSEMI CORPORATION 5 KY202,KY232 5V RS-232 Transceivers Typical Test Circuits Maximum Data Rate Test Circuit Notes: A. B. RL=3kΩ,CL= 1000pF,TA = 25°C, One Driver Switching. The pulse generator had the following characteristics: PRR = 250 kbps, Zo = 50Ω, 50% duty cycle, Tr & Tf < 10ns. KY232 TxIN to TxOut (no load) at 250kbps waveform KY232 TxIN to TxOut to RxOut (loopback to Rx with 1000pF load) at 250kbps waveform Driver Transition-Region Slew Rate Test Circuit Notes: A. B. C. RL=3k~7kΩ,CL= 150~1000pF,TA = 25°C One Driver Switching, Measured from +3V to -3V or -3V to +3V. The pulse generator had the following characteristics: PRR = 250 kbps, Zo = 50Ω, 50% duty cycle, Tr & Tf < 10ns. SD = VCC when applicable. Driver Propagation (tPHL & tPLH) Test Circuit Notes: A. All drivers loaded with RL=3kΩ,CL= 1000pF. B. The pulse generator had the following characteristics: PRR = 250 kbps, Zo = 50Ω, 50% duty cycle, Tr & Tf < 10ns. C. SD = VCC when applicable. KY202,KY232 Rev.1.0 KEYSEMI CORPORATION 6 KY202,KY232 5V RS-232 Transceivers Receiver Propagation Delay Times Test Circuit Notes: A. B. C. CL= 150pF, including probe and jig capacitance. The pulse generator had the following characteristics: PRR = 250 kbps, Zo = 50Ω, 50% duty cycle, Tr & Tf < 10ns. SD = VCC when applicable. Package Information KY202,KY232 Rev.1.0 KEYSEMI CORPORATION 7 KY202,KY232 5V RS-232 Transceivers Ordering Information Part Number KY202LEEN KY232LEEN Temperature Range -40°C to +85°C -40°C to +85°C Package Type 16-pin nSOIC 16-pin nSOIC Please contact the factory for pricing, availability on Tape-and-Reel, and Green Package options. KY202,KY232 Rev.1.0 KEYSEMI CORPORATION 8