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| ST26C32 ...the analog plus company TM QUAD RS-422, RS-423 CMOS Differential Line Receiver June 1997-3 FEATURES D Pin-to-Pin Compatible with National DS26C32C 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 ST26C32 is a CMOS quad differential line receiver designed to meet the standard RS-422, RS-423 requirements. The ST26C32 has an input sensitivity of 200mv over the common mode input voltage range of 7V. To improve noise margin and output stability for slow changing input signal, special hysteresis is built in the ST26C32 circuit. The ST26C32 is a high speed line receiver designed to operate with MFM / RLL controllers and hard disk drives as well as RS-422, and RS-423 differential applications. ST26C32 provides TTL compatible outputs to interface with standard 74LS and CMOS design environments. ST26C32 is suitable for low power 5V operation. ORDERING INFORMATION Part No. ST26C32CP16 ST26C32CF16 ST26C32IP16 ST26C32IF16 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 AINPUT A+ OUTPUT A INPUT DINPUT D+ OUTPUT D ENABLE -ENABLE OUTPUT B INPUT B+ INPUT B- OUTPUT C INPUT C+ 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 ST26C32 PIN CONFIGURATION INPUT A OUTPUT A+ OUTPUT AENABLE 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 D-ENABLE OUTPUT COUTPUT C+ INPUT C INPUT A OUTPUT A+ OUTPUT AENABLE 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 D-ENABLE OUTPUT COUTPUT C+ INPUT C 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 AINPUT A+ OUTPUT A ENABLE OUTPUT B INPUT B+ INPUT BGND INPUT CINPUT C+ OUTPUT C -ENABLE OUTPUT D INPUT D+ INPUT DVCC Type I I O I O I I O I I O I O I I I Description Receiver A differential inverting input pin. Receiver A differential non-inverting input pin. Receiver A output pin. Gate control (active high). This pin is one of the two control pins which enables or disables all four receivers. Receiver B output pin. Receiver B differential non-inverting input pin. Receiver B differential inverting input pin. Signal and power ground. Receiver C differential inverting input pin. Receiver C differential non-inverting input pin. Receiver C output pin. Gate control (active low). See ENABLE description Receiver D output pin. Receiver D differential non-inverting input pin. Receiver D differential inverting input pin. Power supply pin. Rev. 1.01 2 ST26C32 AC ELECTRICAL CHARACTERISTICS Test Conditions: TA = -40C - +85C, VCC = 5.0V + 10% unless otherwise specified. Symbol T1 T2 T3 T4 Parameter Propagation Delay, Input to Output Propagation Delay, Input to Output Output Enable Time Output Disable Time Min. Typ. 8 18 18 18 Max. 10 20 20 20 Unit ns ns ns ns Conditions S1=VCC S1=GND VDIF=2.5V VDIF=2.5V DC ELECTRICAL CHARACTERISTICS Test Conditions: TA = -40C - +85C, VCC = 5.0V + 10% unless otherwise specified. Symbol VIH VIL VOH VOL VID VH IIN ICC IOZ IEN VR Parameter Enable High Level Enable Low Level Output High Level Output Low Level Differential Input Level Input Hysteresis Input Current Operating Current Three-State Output Leakage Enable Input Current Input Resistance 5 12 +1.0 +1.0 15 +5.0 -0.2 50 +1.0 3.8 4.2 0.4 0.2 Min. 2.0 0.8 Typ. Max. Unit V V V V V mV mA mA mA mA KW VDIF=+1V VOUT=VCC or GND VIN=VCC or GND -7V < VCM < +7V IOH= -6mA IOH= 6mA -7V < VCM < +7V Conditions Specifications are subject to change without notice 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 Rev. 1.01 3 ST26C32 Enable -Enable Input Differential Non-Inverting Output X L H Differential Inverting Output X H L L H H H L L Z L H Notes X = Don't care Z = Three-State (high impedance) Table 1. Functional Table VCC S1 R1 10K INPUT A -INPUT A C1 50pF Receiver U1 OUTPUT A -ENABLE Figure 2. Test Condition Rev. 1.01 4 ST26C32 ENABLE -ENABLE INPUT X+ INPUT X- T1 T3 OUTPUT X T2 T4 Figure 3. Differential Line Receiver Timing Rev. 1.01 5 ST26C32 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 ST26C32 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 ST26C32 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 |
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