ST26C31 CMOS quad tri-state differential line driver General features ■ TTL input compatible ■ Typical propagation delay: 6ns ■ Typical output skew: 0.5ns ■ Output will not load line when VCC = 0V ■ Meets the requirements of EIA standard RS-422 ■ Operation from single 5V supply ■ 3-state outputs for connection to system buses ■ Low quiescent current ■ Available in surface mount DIP-16 SO-16 TSSOP16 Description The ST26C31 is a quad differential line driver designed for digital data transmission over balanced lines and meets all the requirements of EIA standard RS-422 while retaining the low power characteristics of CMOS. The ST26C31 accepts TTL or CMOS input levels and translates these to RS-422 output levels. This part uses special outputs circuitry common to all four drivers. All outputs are protected against damage due to electrostatic discharge by diode to VCC and ground. Order code Part number Temperature range Package Packaging ST26C31BN -40 to 85 °C DIP-16 25 parts per tube / 40 tube per box ST26C31BDR -40 to 85 °C SO-16 (Tape & Reel) 2500 parts per reel ST26C31BTR -40 to 85 °C TSSOP16 (Tape & Reel) 2500 parts per reel May 2006 Rev 7 1/15 www.st.com 15 Contents ST26C31 Contents 1 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 4 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 5 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 2/15 ST26C31 Pin configuration 1 Pin configuration Figure 1. Pin connections Table 1. Pin description Pin n° Symbol Name and function 1 AIN 2 AOUT Channel A Output 3 AOUT Channel A Output 4 EN 5 BOUT Channel B Output 6 BOUT Channel B Output 7 BIN 8 GND 9 CIN 10 COUT Channel C Output 11 COUT Channel C Output 12 EN 13 DOUT Channel D Output 14 DOUT Channel D Output 15 DIN INPUT D 16 VCC Supply Voltage INPUT A ENABLE INPUT B Ground INPUT C ENABLE 3/15 Pin configuration Table 2. ST26C31 Truth table Enable Enable Input Output Output L H X Z Z L L H H H L All other combinations of enable inputs Note: 4/15 L = Low Voltage State H = High Logic State X = Don’t Care Z = High Impedance ST26C31 Maximum ratings 2 Maximum ratings Table 3. Absolute maximum ratings (Note 1, Note 2) Symbol Parameter Value Unit -0.5 to 7 V -0.5 to (VCC + 0.5) V -0.5 to 7 V Clamp diode current ± 20 mA IOUT DC Output current per pin ± 150 mA ICC DC VCC or gnd current ± 150 mA -65 to +150 °C VCC Supply voltage VIN DC Input voltage VOUT DC Output voltage (high or low state) IIK TSTG Note: Storage temperature range 1 Absolute Maximum Ratings are those values beyond which the safety of the device cannot be guaranteed. They are not meant to imply that the device should be operated at these limits. The table of electrical characteristics provide conditions for actual device operation. 2 Unless otherwise specified, all voltage are referenced to ground. All currents into the device pins are positive; all currents out of the device pins are negative. Table 4. Recommended operating conditions Symbol Parameter Value Unit VCC Supply voltage 4.5 to 5.5 V VIN DC Input voltage 0 to VCC V VOUT DC Output voltage (high or low state) 0 to VCC V VOUT DC Output voltage (VCC = 0V or high impedance) 0 to 5 V -40 to +85 °C 500 ns TA Operating temperature range tr, tf Maximum enable input rise or fall times 5/15 Electrical characteristics ST26C31 3 Electrical characteristics Table 5. Electrical characteristics (VCC = 5V ± 10%, unless otherwise specified, See Note 1) Value Symbol Parameter Test Conditions Unit Min. VIH High level input voltage VIL Low level input voltage VOH High level output voltage VIN = VIH or VIL, IOUT = -20mA VOL Low level output voltage VIN = VIH or VIL, IOUT = +20mA VT Differential output voltage RL = 100 Ω (Note 2) Typ. Max. 2 V 0.8 VT-VT Difference in differential output voltage RL = 100 Ω (Note 2) VOS Common mode output voltage RL = 100 Ω (Note 2) VOSVOS Difference in common mode output voltage IIN Input current ICC Quiescent supply current (Note 2) IOUT = 0 µA IOZ 2.5 3.4 0.3 2 V V 0.5 3.1 V V 0.4 V 3 V RL = 100 Ω (Note 2) 0.4 V VIN = VCC, GND, VIH or VIL ±1 µA 1.8 VIN = VCC or GND 200 500 µA VIN = 2.4 or 0.5 V (Note 3) 0.8 2 mA 3-STATE output leakage current VOUT = VCC or GND ENABLE = VIH ENABLE = VIL ±0.5 ±5 µA ISC Output short circuit current VIN = VCC or GND (Note 2, Note 4) -150 mA Power off output leakage current (Note 2) VCC = 0 V VOUT = 6 V 100 IOFF µA VOUT = -0.25 V -100 µA Note: 6/15 -30 1 Unless otherwise specified, min/max limits apply across the recommended operating temperature range. All typical are given for VCC = 5V and Ta = 25°C 2 See EIA Specification RS422 for exact test conditions. 3 Measured per pin input. All other input at VCC or GND. 4 This is the current sourced when a high output is shorted to ground. Only one output at time should be shorted. ST26C31 Electrical characteristics Switching characteristics (VCC = 5V ± 10%, tr = tf ≤ 6ns, See Note 1) Table 6. Value Symbol tPLH tPHL Parameter Test Conditions Unit Min. Typ. Max. 2 6 11 ns Propagation delay input to output S1 Open (Note 2) S1 Open 0.5 2 ns tTLH tTHL Differential output rise and fall times S1 Open 6 10 ns tPZH Output enable time S1 Closed 11 19 ns tPZL Output enable time S1 Closed 13 21 ns tPHZ Output disable time (Note 3) S1 Closed 5 9 ns tPLZ Output disable time (Note 3) S1 Closed 7 11 ns CPD Power dissipation capacitance (Note 4) 50 pF CIN Input capacitance 6 pF Skew Note: 1 Unless otherwise specified, min/max limits apply across the recommended operating temperature range. All typical are given for VCC=5V and Ta = 25°C 2 Skewis defined as the difference in propagation delays between complementary outputs at the 50% point. 3 Output disable time is the delay from the control input being switched to the output transistors tuning off. The actual disable times are less than indicated due to the delay added by RC time constant of the load. 4 CPD determines the no load dynamic power consumption, PD = CPDVCC2, f = ICCVCC, and the no load dynamic current consumption, PD = CPD VCCf + ICC . 7/15 Package mechanical data 4 ST26C31 Package mechanical data In order to meet environmental requirements, ST offers these devices in ECOPACK® packages. These packages have a Lead-free second level interconnect. The category of second level interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com 8/15 ST26C31 Package mechanical data Plastic DIP-16 (0.25) MECHANICAL DATA mm. inch DIM. MIN. a1 0.51 B 0.77 TYP MAX. MIN. TYP. MAX. 0.020 1.65 0.030 0.065 b 0.5 0.020 b1 0.25 0.010 D 20 0.787 E 8.5 0.335 e 2.54 0.100 e3 17.78 0.700 F 7.1 0.280 I 5.1 0.201 L Z 3.3 0.130 1.27 0.050 P001C 9/15 Package mechanical data ST26C31 SO-16 MECHANICAL DATA DIM. mm. MIN. TYP A a1 inch MAX. MIN. TYP. 1.75 0.1 0.068 0.25 a2 MAX. 0.004 0.010 1.64 0.063 b 0.35 0.46 0.013 0.018 b1 0.19 0.25 0.007 0.010 C 0.5 0.019 c1 45° (typ.) D 9.8 10 0.385 0.393 E 5.8 6.2 0.228 0.244 e 1.27 0.050 e3 8.89 0.350 F 3.8 4.0 0.149 0.157 G 4.6 5.3 0.181 0.208 L 0.5 1.27 0.019 0.050 M S 0.62 0.024 8° (max.) 0016020D 10/15 ST26C31 Package mechanical data TSSOP16 MECHANICAL DATA mm. inch DIM. MIN. TYP A MAX. MIN. TYP. MAX. 1.2 A1 0.05 A2 0.8 b 0.047 0.15 0.002 0.004 0.006 1.05 0.031 0.039 0.041 0.19 0.30 0.007 0.012 c 0.09 0.20 0.004 0.0079 D 4.9 5 5.1 0.193 0.197 0.201 E 6.2 6.4 6.6 0.244 0.252 0.260 E1 4.3 4.4 4.48 0.169 0.173 0.176 1 e 0.65 BSC K 0° L 0.45 A 0.60 0.0256 BSC 8° 0° 0.75 0.018 8° 0.024 0.030 A2 A1 b e K c L E D E1 PIN 1 IDENTIFICATION 1 0080338D 11/15 Package mechanical data ST26C31 Tape & Reel SO-16 MECHANICAL DATA mm. inch DIM. MIN. A MAX. MIN. 330 13.2 TYP. MAX. 12.992 C 12.8 D 20.2 0.795 N 60 2.362 T 12/15 TYP 0.504 22.4 0.519 0.882 Ao 6.45 6.65 0.254 0.262 Bo 10.3 10.5 0.406 0.414 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 ST26C31 Package mechanical data Tape & Reel TSSOP16 MECHANICAL DATA mm. inch DIM. MIN. A TYP MAX. MIN. 330 MAX. 12.992 C 12.8 D 20.2 0.795 N 60 2.362 T 13.2 TYP. 0.504 22.4 0.519 0.882 Ao 6.7 6.9 0.264 0.272 Bo 5.3 5.5 0.209 0.217 Ko 1.6 1.8 0.063 0.071 Po 3.9 4.1 0.153 0.161 P 7.9 8.1 0.311 0.319 13/15 Revision history ST26C31 5 Revision history Table 7. Revision history Date Revision 02-May-2006 7 14/15 Changes Order codes has been updated and new template. ST26C31 Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. 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