MAX3078E Maxim Integrated Products, MAX3078E Datasheet
MAX3078E
Available stocks
Related parts for MAX3078E
MAX3078E Summary of contents
Page 1
... The MAX3076E/MAX3077E/MAX3078E driver slew rates are not limited, making transmit speeds up to 16Mbps possible. The MAX3079E slew rate is pin selectable for 250kbps, 500kbps, and 16Mbps. The MAX3072E/MAX3075E/MAX3078E are intended for half-duplex communications, and the MAX3070E/ MAX3071E/MAX3073E/MAX3074E/MAX3076E/MAX307 7E are intended for full-duplex communications. The MAX3079E is selectable for half-duplex or full-duplex operation ...
Page 2
ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers ABSOLUTE MAXIMUM RATINGS (All voltages referenced to GND) Supply Voltage (V ).............................................................+6V CC Control Input Voltage (RE, DE, SLR, H/F, TXP, RXP)......................................................-0.3V to +6V Driver Input Voltage (DI)...........................................-0.3V to +6V Driver Output Voltage ...
Page 3
ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers DC ELECTRICAL CHARACTERISTICS (continued 3.3V ±10 unless otherwise noted. Typical values are MIN MAX PARAMETER SYMBOL Driver Short-Circuit Output Current Driver Short-Circuit ...
Page 4
ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers DRIVER SWITCHING CHARACTERISTICS MAX3070E/MAX3071E/MAX3072E/MAX3079E with SRL = UNCONNECTED (250kbps 3.3V ±10 unless otherwise noted. Typical values are MIN MAX PARAMETER SYMBOL ...
Page 5
ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers DRIVER SWITCHING CHARACTERISTICS MAX3073E/MAX3074E/MAX3075E/MAX3079E with SRL = 3.3V ±10 unless otherwise noted. Typical values are MIN MAX PARAMETER SYMBOL Driver ...
Page 6
... Driver Enable from Shutdown to t DZH(SHDN) Output High Driver Enable from Shutdown to t DZL(SHDN) Output Low Time to Shutdown t SHDN RECEIVER SWITCHING CHARACTERISTICS MAX3076E/MAX3077E/MAX3078E/MAX3079E with SRL = GND (16Mbps 3.3V ±10 unless otherwise noted. Typical values are MIN MAX PARAMETER SYMBOL t Receiver Propagation Delay ...
Page 7
ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers (V = 3.3V +25°C, unless otherwise noted SUPPLY CURRENT vs. TEMPERATURE 1 0.7 0.6 0.5 -50 - ...
Page 8
ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers (V = 3.3V +25°C, unless otherwise noted SHUTDOWN CURRENT vs. TEMPERATURE 2.0 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 -50 - 100 ...
Page 9
ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers (V = 3.3V +25°C, unless otherwise noted DRIVER PROPAGATION DELAY (500kbps) MAX3070E toc18 DI 2V/div V Y 2V/div 400ns/div ...
Page 10
ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers GENERATOR DZH DZH(SHDN) OUT Figure 4. Driver Enable and Disable Times ( GENERATOR DZL DZL(SHDN OUT V ...
Page 11
ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers V ATE ID Figure 6. Receiver Propagation Delay Test Circuit +1.5V -1.5V S1 OPEN S2 CLOSED S3 = +1. OPEN S2 CLOSED S3 = +1.5V 1. RHZ 0.25V ...
Page 12
... ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers PIN MAX3070E MAX3071E MAX3072E MAX3073E MAX3074E MAX3075E MAX3076E MAX3077E MAX3078E HALF- FULL-DUPLEX DUPLEX DEVICES DEVICES — — — — — — — — — — — — — — — — — — — ...
Page 13
... ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers PIN MAX3070E MAX3071E MAX3072E MAX3073E MAX3074E MAX3075E MAX3076E MAX3077E MAX3078E HALF- FULL-DUPLEX DUPLEX DEVICES DEVICES 12 8 — — — — — — 6 — — — — — *MAX3079E only. In half-duplex mode, the driver outputs serve as receiver inputs. The full-duplex receiver inputs (A and B) still have a 1/8-unit load, but are not connected to the receiver ...
Page 14
... ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers MAX3072E/MAX3075E/MAX3078E TRANSMITTING INPUTS MAX3079E INPUTS RE TXP H/F RXP Don’t care; shutdown mode, driver and receiver outputs are high impedance. 14 ______________________________________________________________________________________ Function Tables (continued) OUTPUTS RE B/Z A High-Z High-Z 0 Shutdown 1 1 TRANSMITTING RECEIVING INPUTS RE DE ...
Page 15
... Fail-Safe section). The MAX3076E/MAX3078E/MAX3079E also feature a hot- swap capability allowing line insertion without erro- neous data transfer (see the Hot Swap Capability section). The MAX3070E/MAX3071E/MAX3072E feature ...
Page 16
ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers V CC 10µs TIMER SR LATCH TIMER 5kΩ DE 100µA 500µ Figure 9. Simplified Structure of the Driver Enable Pin (DE) MAX3079E Programming The MAX3079E has several programmable operating modes. Transmitter ...
Page 17
ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers 1MΩ 1500Ω DISCHARGE CHARGE-CURRENT- RESISTANCE LIMIT RESISTOR HIGH STORAGE VOLTAGE 100pF CAPACITOR DC SOURCE Figure 10a. Human Body ESD Test Model 50MΩ TO ...
Page 18
... The RS-485/RS-422 standard covers line lengths up to 4000ft. For line lengths greater than 4000ft, use the and repeater application shown in Figure 11. ZH(SHDN) The MAX3072E/MAX3075E/MAX3078E/MAX3079E , t ) than ZL(SHDN) transceivers are designed for bidirectional data commu ...
Page 19
... NOTE: RE AND DE ON MAX3070E/MAX3073E/MAX3076E/MAX3079E ONLY. Figure 13. Typical Full-Duplex RS-485 Network HALF/FULL DATA RATE PART DUPLEX (Mbps) MAX3070E Full MAX3071E Full MAX3072E Half MAX3073E Full MAX3074E Full MAX3075E Half MAX3076E Full Full MAX3077E MAX3078E Half MAX3079E Selectable Selectable ______________________________________________________________________________________ SLEW-RATE LOW-POWER LIMITED SHUTDOWN ...
Page 20
... B GND 4 TYPICAL FULL-DUPLEX OPERATING CIRCUIT 0.1µ GND TYPICAL HALF-DUPLEX OPERATING CIRCUIT NOTE: PIN LABELS Y AND Z ON TIMING, TEST, AND WAVEFORMS DIAGRAMS. REFER TO PINS A AND B WHEN DE IS HIGH. MAX3070E MAX3073E MAX3076E GND DE MAX3071E V CC MAX3074E MAX3077E GND MAX3072E MAX3075E DE MAX3078E ...
Page 21
ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers Pin Configurations and Typical Operating Circuits (continued) TOP VIEW H RXP RXP MAX3079E H ...
Page 22
... Plastic DIP MAX3077EEPA 14 SO MAX3077EESA MAX3077EAPA 14 Plastic DIP 14 SO MAX3077EASA MAX3078EEPA 8 Plastic DIP MAX3078EESA 8 SO MAX3078EAPA 8 Plastic DIP 8 SO MAX3078EASA MAX3079EEPD 8 Plastic DIP 8 SO MAX3079EESD 8 Plastic DIP MAX3079EAPD MAX3079EASD 8 SO TEMP RANGE PIN-PACKAGE -40°C to +85°C 14 Plastic DIP -40°C to +85° -40° ...
Page 23
ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages.) ______________________________________________________________________________________ Package Information 23 ...
Page 24
ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages.) 24 ______________________________________________________________________________________ Package Information (continued) ...
Page 25
... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 25 © 2003 Maxim Integrated Products ...