ST26C32 ...the analog plus company TM QUAD RS-422, RS-423 CMOS Differential Line Receiver June 1997–3 FEATURES Pin-to-Pin Compatible with National DS26C32C Meets the EIA RS-422 Requirements Low Power CMOS Design Low Propagation Delays Three-State Outputs with Enable Pin 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. Package Operating Temperature Range ST26C32CP16 16 Lead 300 Mil PDIP 0°C to +70°C ST26C32CF16 16 Lead 150 Mil JEDEC SOIC 0°C to +70°C ST26C32IP16 16 Lead 300 Mil PDIP -40°C to +85°C ST26C32IF16 16 Lead 150 Mil JEDEC SOIC -40°C to +85°C INPUT A- INPUT D- INPUT A+ INPUT D+ OUTPUT A OUTPUT D ENABLE -ENABLE OUTPUT B OUTPUT C INPUT B+ INPUT C+ INPUT B- INPUT C- Figure 1. Block Diagram Rev. 1.01 1991 EXAR Corporation, 48720 Kato Road, Fremont, CA 94538 (510) 668-7000 FAX (510) 668-7017 1 ST26C32 PIN CONFIGURATION INPUT A OUTPUT A+ OUTPUT AENABLE OUTPUT BOUTPUT B+ INPUT B GND 1 16 2 15 3 14 4 13 5 12 6 11 7 10 8 9 INPUT A OUTPUT A+ OUTPUT AENABLE OUTPUT BOUTPUT B+ INPUT B GND VCC INPUT D OUTPUT D+ OUTPUT D-ENABLE OUTPUT COUTPUT C+ INPUT C 16 Lead PDIP (0.300”) 1 16 2 15 3 14 4 13 5 12 6 11 7 10 8 9 VCC INPUT D OUTPUT D+ OUTPUT D-ENABLE OUTPUT COUTPUT C+ INPUT C 16 Lead SOIC (Jedec, 0.150”) PIN DESCRIPTION Pin # Symbol Type Description 1 INPUT A- I Receiver A differential inverting input pin. 2 INPUT A+ I Receiver A differential non-inverting input pin. 3 OUTPUT A O Receiver A output pin. 4 ENABLE I Gate control (active high). This pin is one of the two control pins which enables or disables all four receivers. 5 OUTPUT B O Receiver B output pin. 6 INPUT B+ I Receiver B differential non-inverting input pin. 7 INPUT B- I Receiver B differential inverting input pin. 8 GND O Signal and power ground. 9 INPUT C- I Receiver C differential inverting input pin. 10 INPUT C+ I Receiver C differential non-inverting input pin. 11 OUTPUT C O Receiver C output pin. 12 -ENABLE I Gate control (active low). See ENABLE description 13 OUTPUT D O Receiver D output pin. 14 INPUT D+ I Receiver D differential non-inverting input pin. 15 INPUT D- I Receiver D differential inverting input pin. 16 VCC I Power supply pin. Rev. 1.01 2 ST26C32 AC ELECTRICAL CHARACTERISTICS Test Conditions: TA = -40°C - +85°C, VCC = 5.0V + 10% unless otherwise specified. Symbol Parameter Min. Typ. Max. Unit Conditions T1 Propagation Delay, Input to Output 8 10 ns S1=VCC T2 Propagation Delay, Input to Output 18 20 ns S1=GND T3 Output Enable Time 18 20 ns VDIF=2.5V T4 Output Disable Time 18 20 ns VDIF=2.5V DC ELECTRICAL CHARACTERISTICS Test Conditions: TA = -40°C - +85°C, VCC = 5.0V + 10% unless otherwise specified. Symbol Parameter Min. Typ. VIH Enable High Level VIL Enable Low Level VOH Output High Level VOL Output Low Level VID Differential Input Level VH Input Hysteresis IIN Input Current ICC Operating Current IOZ Three-State Output Leakage +1.0 IEN Enable Input Current +1.0 VR Input Resistance Max. 2.0 Conditions V 0.8 3.8 Unit 4.2 -0.2 V IOH= -6mA 0.4 V IOH= 6mA 0.2 V -7V < VCM < +7V 50 mV +1.0 12 5 V +5.0 15 A mA VDIF=+1V A VOUT=VCC or GND A VIN=VCC or GND K -7V < VCM < +7V Specifications are subject to change without notice ABSOLUTE MAXIMUM RATINGS Storage Temperature . . . . . . . . . . . . -60°C to +160°C Package Dissipation . . . . . . . . . . . . . . . . . . . . . 500mW Supply Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V Voltage at Any Pin . . . . . . . . GND-0.3V to VCC + 0.3V Operating Temperature . . . . . . . . . . . –40°C to +85°C Rev. 1.01 3 ST26C32 Enable -Enable Input Differential Non-Inverting Output Differential Inverting Output L H Z X X H L L L H H L H H L Notes X = Don’t care Z = Three-State (high impedance) Table 1. Functional Table VCC S1 R1 10K INPUT A U1 OUTPUT A -INPUT A C1 50pF -ENABLE Receiver Figure 2. Test Condition Rev. 1.01 4 ST26C32 ENABLE -ENABLE INPUT X+ INPUT X- T1 T2 T3 T4 OUTPUT X Figure 3. Differential Line Receiver Timing Rev. 1.01 5 ST26C32 16 LEAD PLASTIC DUAL-IN-LINE (300 MIL PDIP) Rev. 1.00 16 9 1 8 E1 E D A2 Seating Plane A L α A1 B MILLIMETERS INCHES SYMBOL eA eB B1 e MIN MAX MIN MAX A 0.145 0.210 3.68 5.33 A1 0.015 0.070 0.38 1.78 A2 0.115 0.195 2.92 4.95 B 0.014 0.024 0.36 0.56 B1 0.030 0.070 0.76 1.78 C 0.008 0.014 0.20 0.38 D 0.745 0.840 18.92 21.34 E 0.300 0.325 7.62 8.26 E1 0.240 0.280 6.10 7.11 e eA 0.100 BSC 2.54 BSC 0.300 BSC 7.62 BSC eB 0.310 0.430 7.87 10.92 L 0.115 0.160 2.92 4.06 α 0° 15° 0° 15° Note: The control dimension is the inch column Rev. 1.01 6 C ST26C32 16 LEAD SMALL OUTLINE (150 MIL JEDEC SOIC) Rev. 1.00 D 16 9 1 E H 8 C A Seating Plane e B α A1 L INCHES SYMBOL MILLIMETERS MIN MAX MIN A 0.053 0.069 1.35 1.75 A1 0.004 0.010 0.10 0.25 B 0.013 0.020 0.33 0.51 C 0.007 0.010 0.19 0.25 D 0.386 0.394 9.80 10.00 E 0.150 0.157 3.80 4.00 e 0.050 BSC MAX 1.27 BSC H 0.228 0.244 5.80 6.20 L 0.016 0.050 0.40 1.27 α 0° 8° 0° 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