MC1489 MC1489A Quad line receivers General features Input resistance -3k to 7k Input signal range 30V ) s ( t c u d o ) Description r s ( P t c e t u e d l o o r s P b e O t e l ) o s ( s t b c u O d o ) r s P ( t c e t u e l d o o r s P b O e t e l o s b OOrder code Input threshold hysteresis built-in Response control: a) Logic threshold shifting b) Input noise filtering DIP SOP The MC1489 monolithic quad line receivers are designed to interface data terminal equipment with data communications equipment in conformance with the specifications of EIA Standard N RS232C. Part Number April 2006 DIP14 SO14 (Tape & reel) MC1489P MC1489D1013TR MC1489AP MC1488AD1013TR Rev 4 1/ www.st.com 17 Contents MC1489/MC1489A Contents 1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5 Test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 6 Typical applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 7 Typical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 8 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 ) s ( t c u d o ) r s ( P t c e t u e d l o o r s P b e O t e l ) o s ( s t b c u O d o ) r s P ( t c e t u e l d o o r s P b O e t e l o s b O 8.1 9 2/17 Device characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 MC1489/MC1489A 1 Diagram Figure 1. Schematic diagram Diagram ) s ( t c u d o ) r s ( P t c e t u e d l o o r s P b e O t e l ) o s ( s t b c u O d o ) r s P ( t c e t u e l d o o r s P b O e t e l o s b O 3/17 Pin description 2 Pin description Figure 2. Pin connections MC1489/MC1489A ) s ( t c u d o ) r s ( P t c e t u e d l o o r s P b e O t e l ) o s ( s t b c u O d o ) r s P ( t c e t u e l d o o r s P b O e t e l o s b O 4/17 MC1489/MC1489A Maximum ratings 3 Maximum ratings Table 1. Absolute maximum ratings Symbol Parameter Value Unit VS Power supply voltage 10 V VI Input voltage range 30 V IOL Output load current 20 mA PTOT Power dissipation 1 W Tamb Operating ambient temperature 0 to 75 C Tstg Storage temperature range -65 to 150 C ) s ( t c u d o ) r s ( P t c e t u e d l o o r s P b e O t e l ) o s ( s t b c u O d o ) r s P ( t c e t u e l d o o r s P b O e t e l o s b O Note: Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied. Table 2. Thermal data Symbol RthJA Parameter Thermal resistance junction-ambient Max Plastic DIP14 SO14 Unit 200 165 C/W 5/17 Electrical characteristics MC1489/MC1489A 4 Electrical characteristics Table 3. Electrical characteristics (Response control pin in open; VS = 5V, Tamb = 0 to 75C, unless otherwise specified) Symbol Parameter IIH Positive input current IIL Negative input current Test Conditions Min. VIH = 25 V 3.6 VIH = 3 V 0.43 VIL = - 25 V -3.6 VIL = - 3 V -0.43 Typ. Max. Unit 8.3 mA -8.3 mA ) s ( t c u d o ) r s ( P t c e t u e d l o o r s P b e O t e l ) o s ( s t b c u O d o ) r s P ( t c e t u e l d o o r s P b O e t e l o s b O VIH Input turn-on threshold voltage Tamb = 25C, VOL 0.45 V IL = 10 mA VIL Input turn-off threshold voltage Tamb = 25C, VOL 2.5 V IL = -0.5 mA 0.75 4 5 Output voltage high VIH = 0.75 V, IL = -0.5 mA 2.5 VOH IL = 0.5 mA Input Open Circuit 2.5 4 5 VOL Output voltage low 0.2 0.45 V IOS Output short circuit current -3 -4 mA for MC1489 1 1.5 V for MC1489A 1.75 1.95 2.25 1.25 V V VIL = 3 V, IL = 10 mA IS Power supply current All gates "ON", IO = 0 mA, VIH = 5 V 16 26 mA PC Power consumption VIH = 5 V 80 130 mW Typ. Max. Unit Table 4. Switching characteristics (VS = 5V, Tamb = 25C) Symbol Parameter Test Conditions Min. tPLH Propagation delay time RL = 3.9 K 25 85 ns tTHL Rise time RL = 3.9 K 120 175 ns tPHL Propagation delay time RL = 390 25 50 ns tTHL Fall time RL = 390 10 20 ns 6/17 MC1489/MC1489A 5 Test circuit Test circuit Figure 3. Switching response ) s ( t c u d o ) r s ( P t c e t u e d l o o r s P b e O t e l ) o s ( s t b c u O d o ) r s P ( t c e t u e l d o o r s P b O e t e l o s b O Figure 4. Response control node C: capacitor is for noise filtering Figure 5. Input current 7/17 Test circuit MC1489/MC1489A Figure 6. Output short-circuit current ) s ( t c u d o ) r s ( P t c e t u e d l o o r s P b e O t e l ) o s ( s t b c u O d o ) r s P ( t c e t u e l d o o r s P b O e t e l o s b O 8/17 Figure 7. Output voltage and input threshold voltage Figure 8. Power supply currents MC1489/MC1489A 6 Typical applications Typical applications Figure 9. RS232C Data transmission ) s ( t c u d o ) r s ( P t c e t u e d l o o r s P b e O t e l ) o s ( s t b c u O d o ) r s P ( t c e t u e l d o o r s P b O e t e l o s b O 9/17 Typical characteristics 7 MC1489/MC1489A Typical characteristics (VS = 5V, Tamb = 25C) Figure 10. Input current vs input voltage Figure 11. MC1489 Input threshold voltage adjustment ) s ( t c u d o ) r s ( P t c e t u e d l o o r s P b e O t e l ) o s ( s t b c u O d o ) r s P ( t c e t u e l d o o r s P b O e t e l o s b O Figure 12. MC1489A Input threshold voltage adjustment Figure 14. Input threshold vs power supply voltage 10/17 Figure 13. Input threshold vs temperature MC1489/MC1489A 8 Application information Application information The Electronic Industries Association (EIA) has released the RS-232C specification detailing the requirements for the interface between data processing equipment and data communications equipment. This standard specifies not only the number and type of interface leads, but also the voltage levels to be used. The MC1488 quad driver and its companion circuit, the MC1489 quad receiver, provide a complete interface system between DTL or TTL logic levels and the RS-232C defined levels. The RS-232C requirements as applied to receivers are discussed herein. The required input impedance is defined as between 3000 and 7000 for input voltages between 3.0 and 25V in magnitude; and any voltage on the receiver input in an open circuit condition must be less than 2.0V in magnitude. The MC1489 circuits meet these requirements with a maximum open circuit voltage of one VBE. ) s ( t c u d o ) r s ( P t c e t u e d l o o 8.1 Device characteristics r s P b e O t e l ) o s ( s t b c u O d o ) r s P ( t c e t u e l d o o r s P b O e t e l o s b O The receiver shall detect a voltage between - 3.0 and - 25V as a Logic "1" and inputs between + 3.0 and + 2.5V as a Logic "0". On some interchange leads, an open circuit of power "OFF" condition (300 or more to ground) shall be decoded as an "OFF" condition or Logic "1". For the reason, the input hysteresis thresholds of the MC1489 circuits are all above ground. Thus an open or grounded input will cause the same output as a negative or Logic "1" input. The MC1489 interface receivers have internal feedback from the second stage to the input stage providing input hysteresis for noise rejection. The MC1489 input has typical turn-on voltage of 1.25V and turn-off of 1.0 V for a typical hysteresis of 250mV. The MC1489A has typical turn-on of 1.95V and turn-off of 0.8V for typically 1.15V of hysteresis. Each receiver section has an external response control node in addition to the input and output pins, thereby allowing the designer to vary the input threshold voltage levels. A resistor can be connected between this node and an external power supply. Figure 4., Figure 6. and Figure 7. illustrate the input threshold voltage shift possible through this technique. This response node can also be used for the filtering of the high-frequency, high-energy noise pulses. Figure 11. and Figure 12. show typical noise-pulse rejection for external capacitors of various sizes. These two operations on the response node can be combined or used individually for may combinations of interfacing applications. The MC1489 circuits are particularly useful for interfacing between MOS circuits and MDTL/MTTL logic systems. In this application, the input threshold voltages are adjusted. (with the appropriate supply and resistor values) to fall in the center of the MOS voltage logic levels (see Figure 13.). The response node may also be used as the receiver input as long as the designer realizes that he may not drive this node with a low impedance source to a voltage greater than one diode above ground or less than one diode below ground. This feature is demonstrated in Figure 14. where two receivers are slaved to the same line that must still meet the RS-232C impedance requirement. 11/17 Application information MC1489/MC1489A ) Figure 15. Typical turn-on threshold vs Figure 16. Typical turn-on threshold vs capacitance from response control capacitance from response control pin to GND pin to GND ) s ( t c u d o ) r s ( P t c e t u e d l o o r s P b e O t e l ) o s ( s t b c u O d o ) r s P ( t c e t u e l d o o r s P b O e t e l o s b O Figure 17. Typical paralleling of two MC1489/A Receivers to meet RS-232C 12/17 MC1489/MC1489A Application information Plastic DIP-14 MECHANICAL DATA mm. inch DIM. MIN. a1 0.51 B 1.39 b TYP MAX. MIN. TYP. MAX. 0.020 1.65 0.055 0.5 0.065 0.020 ) s ( t c u d o ) r s ( P t c e t u e d l o o r s P b e O t e l ) o s ( s t b c u O d o ) r s P ( t c e t u e l d o o r s P b O e t e l o s b O b1 0.25 D 0.010 20 0.787 E 8.5 0.335 e 2.54 0.100 e3 15.24 0.600 F 7.1 0.280 I 5.1 0.201 L Z 3.3 1.27 0.130 2.54 0.050 0.100 P001A 13/17 Application information MC1489/MC1489A SO-14 MECHANICAL DATA DIM. mm. MIN. TYP inch MAX. MIN. TYP. MAX. A 1.35 1.75 0.053 0.069 A1 0.1 0.25 0.004 0.010 A2 1.10 1.65 0.043 0.065 B 0.33 0.51 0.013 0.020 ) s ( t c u d o ) r s ( P t c e t u e d l o o r s P b e O t e l ) o s ( s t b c u O d o ) r s P ( t c e t u e l d o o r s P b O e t e l o s b O C 0.19 0.25 0.007 0.010 D 8.55 8.75 0.337 0.344 E 3.8 4.0 0.150 0.157 e 1.27 0.050 H 5.8 6.2 0.228 0.244 h 0.25 0.50 0.010 0.020 L 0.4 1.27 0.016 0.050 k 0 8 0 8 ddd 0.100 0.004 0016019D 14/17 MC1489/MC1489A Application information Tape & Reel SO-14 MECHANICAL DATA mm. inch DIM. MIN. A TYP MAX. MIN. 330 C 12.8 D 20.2 13.2 TYP. MAX. 12.992 0.504 0.519 0.795 ) s ( t c u d o ) r s ( P t c e t u e d l o o r s P b e O t e l ) o s ( s t b c u O d o ) r s P ( t c e t u e l d o o r s P b O e t e l o s b O N 60 T 2.362 22.4 0.882 Ao 6.4 6.6 0.252 0.260 Bo 9 9.2 0.354 0.362 Ko 2.1 2.3 0.082 0.090 Po 3.9 4.1 0.153 0.161 P 7.9 8.1 0.311 0.319 15/17 Revision history MC1489/MC1489A 9 Revision history Table 5. Revision history Date Revision 13-Apr-2006 4 Changes Order codes has been updated and new template. ) s ( t c u d o ) r s ( P t c e t u e d l o o r s P b e O t e l ) o s ( s t b c u O d o ) r s P ( t c e t u e l d o o r s P b O e t e l o s b O 16/17 MC1489/MC1489A ) s ( t c u d o ) r s ( P t c e t u e d l o o r s P b e O t e l ) o s ( s t b c u O d o ) r s P ( t c e t u e l d o o r s P b O e t e l o s b O Please Read Carefully: Information in this document is provided solely in connection with ST products. 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