 |
|
| 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: |
| ST34C87 ...the analog plus company TM QUAD RS-422 CMOS Differential Line Driver June 1997-3 FEATURES D Pin-to-Pin Compatible with National DS34C87 D Low Power CMOS Design D Three-State Outputs with Enable Pin D Meets the EIA RS-422 Requirements D Low Propagation Delays D High Speed GENERAL DESCRIPTION The ST34C87 is a CMOS quad differential line driver designed to meet the standard RS-422 requirements and digital data transmission over balanced lines. To improve noise margin and output stability for slow changing input signals, special hysteresis is built in the ST34C87 circuit. The ST34C87 is a high speed CMOS line driver designed to operate with MFM / RLL controllers and hard disk drives as well as RS-422 digital data transmission applications. ST34C87 is suitable for low power 5V operation with high input voltage protection devices. ORDERING INFORMATION Part No. ST34C87CP16 ST34C87CF16 ST34C87IP16 ST34C87IF16 Package 16 Lead 300 Mil PDIP 16 Lead 150 Mil JEDEC SOIC 16 Lead 300 Mil PDIP 16 Lead 150 Mil JEDEC SOIC Operating Temperature Range 0C to +70C 0C to +70C -40C to +85C -40C to +85C INPUT A INPUT D OUTPUTA+ OUTPUT A- OUTPUT D+ OUTPUT D- ENABLE A/B ENABLE C/D OUTPUTBOUTPUTB+ OUTPUT COUTPUT C+ INPUT B INPUT C Figure 1. Block Diagram Rev. 1.01 E1991 EXAR Corporation, 48720 Kato Road, Fremont, CA 94538 z (510) 668-7000 z FAX (510) 668-7017 1 ST34C87 PIN CONFIGURATION INPUT A OUTPUT A+ OUTPUT AENABLE A/B OUTPUT BOUTPUT B+ INPUT B GND VCC INPUT D OUTPUT D+ OUTPUT DENABLE C/D OUTPUT COUTPUT C+ INPUT C INPUT A OUTPUT A+ OUTPUT AENABLE A/B OUTPUT BOUTPUT B+ INPUT B GND 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 VCC INPUT D OUTPUT D+ OUTPUT DENABLE C/D OUTPUT COUTPUT C+ INPUT C 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 16 Lead PDIP (0.300") 16 Lead SOIC (Jedec, 0.150") PIN DESCRIPTION Pin # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Symbol INPUT A OUTPUT A+ OUTPUT AENABLE A/B OUTPUT BOUTPUT B+ INPUT B GND INPUT C OUTPUT C+ OUTPUT CENABLE C/D OUTPUT DOUTPUT D+ INPUT D VCC Type I O O I O O I O I O O I O O I I Description Driver A input pin. Driver A differential non-inverting output pin. Driver A differential inverting output pin. Gate control (active high). This pin is one of the two control pins which enables or disables all four drivers. All four drivers are gated with two input or gate. Driver B differential inverting output pin. Driver B differential non-inverting output pin. Driver B input pin. Signal and power ground. Driver C input pin. Driver C differential non-inverting output pin. Driver C differential inverting output pin. Gate control (active low). See ENABLE A/B pin description. Driver D differential inverting output pin. Driver D differential non-inverting output pin. Driver D input pin. Power supply pin. Rev. 1.01 2 ST34C87 AC ELECTRICAL CHARACTERISTICS Test Conditions: -40C - +85C, VCC = 5.0V + 10% unless otherwise specified. Symbol T1 T2 T3 T4 T5 Note: 1 Skew 1 Parameter Propagation Delay, Input to Output Differential Output Rise and Fall Time Output Enable Time Output Disable Time Skew Min. Typ. 8 8 18 18 Max. 10 10 20 20 2 Unit ns ns ns ns ns Conditions S1 open S1 open S1 close S1 close S1 open is defined as the difference in propagation delays between complementary outputs at the 50% point. DC ELECTRICAL CHARACTERISTICS Test Conditions: TA = -40C - +85C, VCC = 5.0V + 10% unless otherwise specified. Symbol IIN ICC IOZ VIH VIL VOH VOL VOS VOC VOD CIN CPD IOS IOFF Parameter Input Current Operating Current Three-State Output Leakage Input High Level Input Low Level Output High Level Output Low Level Differential Output Level Common Mode Output Voltage Difference in Common Mode Output Input Capacitance Power Dissipation Capacitance Output Short Current Output Leakage Current Power Off Output Current -200 7 10 100 -30 100 -100 IDC +150 2.0 3.0 0.4 15 pF pF mA mA mA mA VIN=VCC or GND VOUT=6V VOUT=0.25V 2.5 0.5 2.0 0.8 600 +2.0 Min. Typ. Max. +1.0 Unit mA mA mA V V V V V V RL=100W RL=100W RL=100W Conditions Specifications are subject to change without notice Rev. 1.01 3 ST34C87 ABSOLUTE MAXIMUM RATINGS Supply Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V Voltage at Any Pin . . . . . . . . GND-0.3V to VCC + 0.3V Operating Temperature . . . . . . . . . . . -40C to +85C Storage Temperature . . . . . . . . . . . . -60C to +160C Package Dissipation . . . . . . . . . . . . . . . . . . . . . 500mW Enable A/B C/D L H H Output Differential Non-Inverting Output Z L H Differential Inverting Output Z H L X L H X = Don't care Z = Three-State (high impedance) Table 1. Functional Table VCC U1 ENABLE Input C2 40pF C1 40pF Driver C3 40pF R2 50 R1 50 R3 500 S1 Figure 2. Test Condition Rev. 1.01 4 ST34C87 ENABLE ENABLE* INPUT X T3 OUTPUT X+ T3 OUTPUT X90% 10% T2 10% T4 T1 T1 T4 90% T1 T1 T2 OUTPUT X+ 50% T5 OUTPUT X50% Figure 4. Differential Line Driver Timing Rev. 1.01 5 ST34C87 16 LEAD PLASTIC DUAL-IN-LINE (300 MIL PDIP) Rev. 1.00 16 1 D 9 8 E1 E A2 Seating Plane A L A1 B e B1 eA eB C INCHES SYMBOL A A1 A2 B B1 C D E E1 e eA eB L MIN 0.145 0.015 0.115 0.014 0.030 0.008 0.745 0.300 0.240 MAX 0.210 0.070 0.195 0.024 0.070 0.014 0.840 0.325 0.280 MILLIMETERS MIN 3.68 0.38 2.92 0.36 0.76 0.20 18.92 7.62 6.10 MAX 5.33 1.78 4.95 0.56 1.78 0.38 21.34 8.26 7.11 0.100 BSC 0.300 BSC 0.310 0.115 0 0.430 0.160 15 2.54 BSC 7.62 BSC 7.87 2.92 0 10.92 4.06 15 Note: The control dimension is the inch column Rev. 1.01 6 ST34C87 16 LEAD SMALL OUTLINE (150 MIL JEDEC SOIC) Rev. 1.00 D 16 1 9 8 E H C Seating Plane e B A1 L A INCHES SYMBOL A A1 B C D E e H L MIN 0.053 0.004 0.013 0.007 0.386 0.150 MAX 0.069 0.010 0.020 0.010 0.394 0.157 MILLIMETERS MIN 1.35 0.10 0.33 0.19 9.80 3.80 MAX 1.75 0.25 0.51 0.25 10.00 4.00 0.050 BSC 0.228 0.016 0 0.244 0.050 8 1.27 BSC 5.80 0.40 0 6.20 1.27 8 Note: The control dimension is the millimeter column Rev. 1.01 7 ST34C87 NOTICE EXAR Corporation reserves the right to make changes to the products contained in this publication in order to improve design, performance or reliability. EXAR Corporation assumes no responsibility for the use of any circuits described herein, conveys no license under any patent or other right, and makes no representation that the circuits are free of patent infringement. Charts and schedules contained here in are only for illustration purposes and may vary depending upon a user's specific application. While the information in this publication has been carefully checked; no responsibility, however, is assumed for inaccuracies. EXAR Corporation does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reasonably be expected to cause failure of the life support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications unless EXAR Corporation receives, in writing, assurances to its satisfaction that: (a) the risk of injury or damage has been minimized; (b) the user assumes all such risks; (c) potential liability of EXAR Corporation is adequately protected under the circumstances. Copyright 1997 EXAR Corporation Datasheet June 1997 Reproduction, in part or whole, without the prior written consent of EXAR Corporation is prohibited. Rev. 1.01 8 |
Price & Availability of ST34C87CF1
 |
|
|
|
|
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] |