 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| ST1480A 3.3V POWERED, 15KV ESD PROTECTED, TRASMIT AT UP TO 12MBPS TRUE RS-485/RS-422 TRANSCEIVER s s s s s s s s s s s ESD PROTECTION: 15KV HUMAN BODY MODEL 8KV IEC 1000-4-2 CONTACT DISCHARGE OPERATE FROM A SINGLE 3.3V SUPPLY NO CHARGE PUMP REQUIRED INTEROPERABLE WITH 5V LOGIC 1A LOW CURRENT SHUTDOWN MODE MAX GUARANTEED 12 Mbps DATA RATE -7 TO 12 COMMON MODE INPUT VOLTAGE RANGE HALF DUPLEX VERSIONS AVAILABLE INDUSTRY STANDARD 75176 PINOUT CURRENT LIMITING AND THERMAL SHUTDOWN FOR DRIVER OVERLOAD PROTECTION GUARANTEED HIGH RECEIVER OUTPUT STATE FOR FLOATING, SHORTED OR TERMINATED INPUTS WITH NO SIGNAL PRESENT ALLOW UP TO 64 TRANSCEIVERS ON THE BUS DIP SOP DESCRIPTION The ST1480A is 15kV ESD protected, 3.3V low power transceiver for RS-485 and RS-422 ORDERING CODES Type ST1480ACN ST1480ABN ST1480ACD ST1480ABD ST1480ACDR ST1480ABDR Temperature Range 0 to 70 C -40 to 85 C 0 to 70 C -40 to 85 C 0 to 70 C -40 to 85 C Package communications. The device contains one driver and one receiver in half duplex configuration. The ST1480A transmit and receive at guaranteed data rate at least to 12Mbps. All transmitter outputs and receiver inputs are protected to 15kV using Human Body Model. Driver is short-circuit current limited and is protected against excessive power dissipation by thermal shutdown circuitry that place the driver outputs into a high-impedance state. The ST1480A input has a true fail-safe feature that guarantees a logic high output if both inputs are open circuit, shorted together or in presence of the termination with no signal on the bus. Comments 50parts per tube / 40tube per box 50parts per tube / 40tube per box 100parts per tube / 20tube per box 100parts per tube / 20tube per box 2500 parts per reel 2500 parts per reel DIP-8 DIP-8 SO-8 (Tube) SO-8 (Tube) SO-8 (Tape & Reel) SO-8 (Tape & Reel) October 2002 1/16 ST1480A PIN CONFIGURATION PIN DESCRIPTION PlN N 1 2 SYMBOL RO RE NAME AND FUNCTION Receiver Output. If A>B by 200mV, RO will be high; if A3 DE 4 5 6 7 8 DI GND A B VCC TRUTH TABLE (DRIVER) INPUTS RE X X L H DE H H L L DI H L X X OUTPUTS MODE B L H Z Z A H L Z Z Normal Normal Normal Shutdown TRUTH TABLE (RECEIVER) INPUTS RE DE L L L L H L L L L L A-B -0.015V -0.2V Inputs Open Inputs Shorted X OUTPUT MODE RO H L H H Z Normal Normal Normal Normal Shutdown X= Don't Care; Z=High Impedance X= Don't Care; Z=High Impedance 2/16 ST1480A ABSOLUTE MAXIMUM RATINGS Symbol VCC VI VDI VDO VRI VRO Supply Voltage Control Input Voltage (RE, DE) Driver Input Voltage (DI) Driver Output Voltage (A, B) Receiver Input Voltage (A, B) Receiver Output Voltage (RO) Parameter Value 7 -0.3 to 7 -0.3 to 7 -7.5 to 12.5 -7.5 to 12.5 -0.3 to (VCC + 0.3) Unit V V V V V V Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied. ESD PERFORMANCE: TRANSMITTER OUTPUTS, RECEIVER INPUTS Symbol ESD ESD Parameter ESD Protection Voltage ESD Protection Voltage Test Conditions Human Body Model IEC-1000-4-2 Contact Disharge Min. Typ. 15 8 Max. Unit KV KV ELECTRICAL CHARACTERISTICS VCC = 3V to 3.6V, TA = -40 to 85C, unless otherwise specified. Typical values are referred to TA = 25C) Symbol Parameter Test Conditions No Load, DI=0V or VCC DE=VCC, RE=0V or VCC DE=0V, RE=0V ISHDN Shutdown Supply Current DE=0V, RE=VCC, DI=0V or VCC Min. Typ. 1.3 1.2 0.002 Max. 2.2 1.9 1 Unit mA mA A ISUPPLY VCC Power Supply Current LOGIC INPUT ELECTRICAL CHARACTERISTICS VCC = 3V to 3.6V, TA = -40 to 85C, unless otherwise specified. Typical values are referred to TA = 25C) Symbol VIL VIH IIN1 IIN2 Parameter Input Logic Threshold Low Input Logic Threshold High Logic Input Current Input Current (A, B) DE, DI, RE DE, DI, RE DE, DI, RE DE=0V, VCC= 0 or 3.6V VIN=12V VIN=-7V 2 2.0 1 0.8 Test Conditions Min. Typ. 1.3 Max. 0.8 Unit V V A mA mA 3/16 ST1480A TRANSMITTER ELECTRICAL CHARACTERISTICS VCC = 3V to 3.6V, TA = -40 to 85C, unless otherwise specified. Typical values are referred to Ta = 25C) Symbol VOD Parameter Differential Drive Output Test Conditions RL= 100 (RS-422) (Figure 1) RL= 54 (RS-485) (Figure 1) RL= 60 (RS-485) (Figure 2) VOD Change in magnitude of RL= 54 or 100 (Figure 1) Driver Differential Output Voltage for Complementary Output States (Note1) Driver Common Mode RL= 54 or 100 (Figure 1) Output Voltage Change in magnitude of RL= 54 or 100 (Figure 1) Driver Common Mode Output Voltage (Note1) Driver Short Circuit Output Current Min. 2 1.5 1.5 0.2 Typ. Max. Unit V V V V VOC VOC 3 0.2 V V IOSD 250 mA RECEIVER ELECTRICAL CHARACTERISTICS VCC = 3V to 3.6V, TA = -40 to 85C, unless otherwise specified. Typical values are referred to Ta = 25C) Symbol VTH VTH VOH VOL IOZR RRIN IOSR Parameter Receiver Differential Threshold Voltage Receiver Input Hysteresis Receiver Output High Voltage Receiver Output Low Voltage 3-State (High Impedance) Output Current at Receiver Receiver Input Resistance Receiver Short-Circuit Current Test Conditions VCM = -7V to 12V, DE = 0 VCM = 0V IOUT = -4mA, VID = 200mV, (Figures 8,9) IOUT = 4mA, VID = -200mV, (Figure 3) VCC = 3.6V VO = 0V to VCC 24 7 60 2 0.4 1 Min. -0.2 30 Typ. Max. -0.015 Unit V V V V A K mA VCM = -7V to 12V VRO = 0V to VCC 4/16 ST1480A DRIVER SWITCHING CHARACTERISTICS VCC = 3V to 3.6V, TA = -40 to 85C, unless otherwise specified. Typical values are referred to Ta = 25C) Symbol DR tDD tTD tPLH tPHL tPDS tPZL tPZH tPHZ tPLZ tSKEW Parameter Maximum Data Rate Differential Output Delay Differential Output Transition Time Propagation Delay |tPLH - tPHL| Propagation Delay Skew (Note2) Output Enable Time Output Enable Time Output Disable Time Output Disable Time RL= 60 RL= 60 RL= 27 RL= 27 RL= 110 RL= 110 RL= 110 RL= 110 CL = 15pF, (Figures 4,5) CL = 15pF, (Figures 4,5) CL = 15pF, (Figures 8,9) CL = 15pF, (Figures 8,9) (Figures 10,11) (Figures 6,7) (Figures 6,7) (Figures 10,11) Test Conditions Min. 12 Typ. 15 18 12 18 2 19 30 19 30 1 30 19 30 20 30 5 35 50 35 50 3 50 35 Max. Unit Mbps ns ns ns ns ns ns ns ns ns ns ns Differential Output Delay Skew tZH(SHDN) Driver Enable from Shutdown to Output High tZL(SHDN) Driver Enable from Shutdown to Output Low RECEIVER SWITCHING CHARACTERISTICS VCC = 3V to 3.6V, TA = -40 to 85C, unless otherwise specified. Typical values are referred to Ta = 25C) Symbol tPLH tPHL tRPDS tPZL tPZH tPHZ tPLZ Parameter Propagation Delay |tPLH - tPHL| Propagation Delay Skew Output Enable Time Output Enable Time Output Disable Time Output Disable Time Test Conditions VID = 0V to 3VCL1 = 15pF, (Figures 12,13) VID = 0V to 3VCL1 = 15pF, (Figures 12,13) CRL = 15pF (Figures 14-18) CRL = 15pF (Figures 14-18) CRL = 15pF (Figures 14-18) CRL = 15pF (Figures 14-18) CRL = 15pF (Figures 14-18) CRL = 15pF (Figures 14-18) Min. Typ. 30 1 10 10 10 10 10 20 Max. 50 3 20 20 20 20 20 40 Unit ns ns ns ns ns ns ns ns tZH(SHDN) Receiver Enable from Shutdown to Output High tZL(SHDN) Receiver Enable from Shutdown to Output Low Note 1: VOD and VOC are the changes in VOD and VOC , respectively, when the DI input changes state. Note 2: measured on |tPLH(A)-tPHL (A)| and |tPLH(B)-tPHL(B)| Note 3: The transceivers are put into shutdown by bring RE high and DE low. If the input are in state for less than 80ns, the part are guarenteed not to enter shutdown. If the inputs are in this state for at least 300ns, the parts are guarenteed to have entered shutdown. 5/16 ST1480A TEST CIRCUITS AND TYPICAL CHARACTERISTICS Figure 1 : Driver and VOC Test Load Figure 2 : Driver VOD with Varying Common Mode Voltage Test Load Figure 3 : Receiver VOH and VOL Test Circuit 6/16 ST1480A Figure 4 : Drive Differential Output Delay Transition Time Test Circuit Figure 5 : Drive Differential Output Delay Transition Time Waveform Figure 6 : Drive Enable and Disable Times Test Circuit 7/16 ST1480A Figure 7 : Drive Enable and Disable Times Waveforms Figure 8 : Drive Propagation Time Test Circuit Figure 9 : Drive Propagation Time Waveform 8/16 ST1480A Figure 10 : Drive Enable and Disable Times Test Circuit Figure 11 : Drive Enable and Disable Times Waveforms Figure 12 : Receiver Propagation Delay Time Test Circuit 9/16 ST1480A Figure 13 : Receiver Propagation Delay Time Waveforms Figure 14 : Receiver Enable and Disable Times Test Circuit Figure 15 : Receiver Enable and Disable Times Waveform 10/16 ST1480A Figure 16 : Receiver Enable and Disable Times Waveform Figure 17 : Receiver Enable and Disable Times Waveform Figure 18 : Receiver Enable and Disable Times Waveform 11/16 ST1480A Figure 19 : Receiver Output Current vs Output Low Voltage Figure 22 : High Level Driver Output Capability Figure 20 : Receiver Output Current vs Output High Voltage Figure 23 : Receiver Input Characteristics Figure 21 : Low Level Driver Output Capability Figure 24 : Driver Short Circuit Current 12/16 ST1480A Figure 25 : Driver Short Circuit Current 13/16 ST1480A Plastic DIP-8 MECHANICAL DATA mm. DIM. MIN. A a1 B B1 b b1 D E e e3 e4 F I L Z 0.44 3.3 1.6 0.017 8.8 2.54 7.62 7.62 7.1 4.8 0.130 0.063 0.38 0.7 1.39 0.91 0.5 0.5 9.8 0.346 0.100 0.300 0.300 0.280 0.189 0.015 1.65 1.04 TYP 3.3 0.028 0.055 0.036 0.020 0.020 0.386 0.065 0.041 MAX. MIN. TYP. 0.130 MAX. inch P001F 14/16 ST1480A SO-8 MECHANICAL DATA DIM. A a1 a2 a3 b b1 C c1 D E e e3 F L M S 3.8 0.4 4.8 5.8 1.27 3.81 4.0 1.27 0.6 8 (max.) 0.149 0.015 5.0 6.2 0.65 0.35 0.19 0.25 0.1 mm. MIN. TYP MAX. 1.75 0.25 1.65 0.85 0.48 0.25 0.5 45 (typ.) 0.189 0.228 0.050 0.150 0.157 0.050 0.023 0.196 0.244 0.025 0.013 0.007 0.010 0.003 MIN. inch TYP. MAX. 0.068 0.009 0.064 0.033 0.018 0.010 0.019 0016023 15/16 ST1480A Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. (c) The ST logo is a registered trademark of STMicroelectronics (c) 2002 STMicroelectronics - Printed in Italy - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco Singapore - Spain - Sweden - Switzerland - United Kingdom - United States. (c) http://www.st.com 16/16 |
Price & Availability of ST1480A
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |