STLVDS31 High speed differential line drivers Feature summary ■ Meets or exceeds the requirements of ansi TIA/EIA-644 standard ■ Low voltage differential signaling with typical output voltage of 350mV and a 100Ω load ■ Typical output voltage rise and fall times of 750ps (400mbps) ■ Typical propagation delay times of 1.7ns ■ Operates from a single 3.3V supply ■ Power dissipation 25mW typical per driver at 200MHz ■ Driver at high impedance when disabled or with VCC = 0V ■ Pin compatible with the AM26LS31, SN65LVD31 ■ TSSOP Low voltage TTL (LVTTL) logic input levels Description The STLVDS31 is a quad differential line drivers that implements the electrical characteristics of low voltage differential signaling (LVDS). This signaling technique lowers the output voltage levels of 5V differential standard levels (such as TIA/EIA-422B) to reduce the power, increase the switching speeds and allows operations with a 3.3V supply rail. Any of the four current mode drivers will deliver a minimum differential output voltage magnitude of 247mV into a 100Ω load when enabled. The intended application of this device and signalling technique is for point-to-point baseband data transmission over controlled impedance media approximately 100Ω. The transmission media may be printed circuit board traces, backplanes or cables. The ultimate rate and distance of data transfer is dependent upon the attenuation characteristics of the media and noise coupling to the environment. The STLVDS31 is characterized for operation from -55°C to 125°C. . Order code Part number Temperature Range Package Comments STLVDS31BTR -55 to 125 °C TSSOP16 (Tape & Reel) 2500 parts per reel March 2006 Rev. 5 1/15 www.st.com 15 STLVDS31 Contents 1 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 4 Typical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 5 Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 6 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 7 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 2/15 STLVDS31 Pin configuration 1 Pin configuration Figure 1. Pin connections and functional diagram Table 1. Pin description Pin n° Symbol Name and function 1, 7, 9, 15 1A to 4A Driver inputs 2, 6, 10, 14 1Y to 4Y Driver outputs 3, 5, 11, 13 1Z to 4Z Driver outputs 4 G Enable 12 G Enable 8 GND Ground 16 VCC Supply voltage 3/15 Pin configuration STLVDS31 Figure 2. Logic diagram and logic symbol Table 2. Truth table for receiver Table 3. VID = VA - V B R VID ≥ 100mV H -100mV < VID < 100mV ? VID ≤ −100mV L OPEN H Truth table Input Enables Outputs A G G Y Z H H X H L L H X L H H X L H L L X L L H X L H Z Z OPEN H X L H OPEN X L L H L=Low level, H=High Level, X=Don’t care, Z= High Impedance 4/15 STLVDS31 Maximum ratings 2 Maximum ratings Table 4. Absolute maximum ratings Symbol Parameter Value Unit VCC Supply Voltage (1) -0.5 to 4.6 V VI DC Input Voltage -0.5 to (VCC + 0.5) V -65 to +150 °C Tstg Storage Temperature Range 1. All voltages except differential I/O bus voltage, are with respect to the network ground terminal. Note: Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied. Table 5. Recommended operating conditions Symbol Parameter Min. Typ. Max. Unit 3.3 3.6 V VCC Supply Voltage 3.0 VIH HIGH Level Input Voltage 2.0 VILI LOW Level Input Voltage TA Operating Temperature Range -40 V 0.8 V 85 °C 5/15 Electrical characteristics STLVDS31 3 Electrical characteristics Table 6. Electrical characteristics (Over recommended operating conditions unless otherwise noted. All typical values are at TA = 25°C, and VCC = 3.3V). Symbol Parameter VOD Differential Output Voltage ∆VOD Change in Differential Output Voltage Between Logic State Change in Steady-state ∆VOC(SS) Common Mode Output Voltage Between Logic State VOC(SS) Steady-state Common Mode Output Voltage VOC(PP) Peak to Peak Common mode Output Voltage Test Min. Typ. Max. Unit 247 350 454 mV 50 mV 1.375 V 50 mV 80 150 mV 11.5 20 mA VIN = 0.8V or 2V, Enabled, RL = 100Ω 25 35 mA VIN = 0 or VCC, Disabled 0.3 1 mA 4 20 µA RL = 100Ω, Fig. 2 Fig. 3 1.125 Fig. 3 -50 VIN = 0.8V or 2V, Enabled, No Load ICC Supply Current -50 1.2 IIH High Level Input Current VIH = 2V IIL Low Level Input Current VIL = 0.8V 0.6 10 µA -24 mA Short Circuit Output Current VO(Y) or VO(Z) = 0V 6.1 ISC ± 12 mA IOZ High Impedance Output Current VO = 0 or 2.4V ±1 µA ICS Cold Spare Leakage Current VI = 3.6V, VDD = 0V ±20 µA IOFF Power OFF Output Current VCC = 0VO = 2.4V ±1 µA CIN Input Capacitance 6/15 VOD = 0 3 pF STLVDS31 Table 7. Electrical characteristics Switching characteristics (Over recommended operating conditions unless otherwise noted. All typical values are at TA = 25°C, and VCC = 3.3V). Symbol Parameter Test Min. Typ. Max. Unit tPLH Propagation Delay Time, Low to High Output 0.5 1.4 2 ns tPHL Propagation Delay Time, High to Low Output 1 1.7 2.5 ns 0.4 0.5 0.6 ns 0.4 0.5 0.6 ns 0.3 0.6 ns 0 0.3 ns tr Differential Output Signal Rise Time tf Differential Output Signal Fall Time tsk(P) tsk(O) RL = 100Ω, CL = 10pF Fig. 2 Pulse Skew (|tTHL = tTLH|) Channel to Channel Output Skew (1) tPZH Propagation Delay Time, High Impedance to High Level Output 5.4 15 ns tPZL Propagation Delay Time, High Impedance to Low Level Output 2.5 15 ns tPHZ Propagation Delay Time, High Level to High Impedance Output 8.1 15 ns tPLZ Propagation Delay Time, Low Level to High Impedance Output 7.3 15 ns Fig. 4 1. tsk(O) is the maximum delay time difference between drivers on the same device. RS-232 IN to TTL-CMOS OUT (from 50% to 50%). 7/15 Typical characteristics 4 Typical characteristics Figure 3. Voltage and current definitions Figure 4. Test circuit, timing and voltage definitions for differential output signal STLVDS31 Note A: All input pulse are supplied by a generator having the following characteristics: tr or tf ≤ 1ns, pulse repetition rate (PRR) = 50Mpps, pulse width = 10 ± 0.2ns. Note B: CL includes instrumentation and fixture capacitance within 6mm of the D.U.T. 8/15 STLVDS31 Figure 5. Typical characteristics Test circuit and definitions for the driver common mode output voltage Note A: All input pulse are supplied by a generator having the following characteristics: tr or tf ≤ 1ns, pulse repetition rate (PRR) = 50Mpps, pulse width = 10 ± 0.2ns. Note B: CL includes instrumentation and fixture capacitance within 6mm of the D.U.T Note C: The measurement of VOC(PP) is made on test equipment with a -3dB bandwidth of at least 300MHz. Figure 6. Enable and disable time test circuit and waveform Note A: All input pulse are supplied by a generator having the following characteristics: tr or tf ≤ 1ns, pulse repetition rate (PRR) = 0.5Mpps, pulse width = 500 ± 10ms. Note B: CL includes instrumentation and fixture capacitance within 6mm of the D.U.T. 9/15 Typical performance characteristics 5 STLVDS31 Typical performance characteristics (Unless otherwise specified TJ = 25°C) Figure 7. Supply Current vs Temperature Figure 9. Propagation Delay Enable to Output Figure 10. Propagation Delay time Figure 11. Differential Output Signal 10/15 Figure 8. Supply Current vs Temperature STLVDS31 6 Package mechanical data 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. 11/15 Package mechanical data STLVDS31 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 12/15 STLVDS31 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 STLVDS31 7 Revision history Table 8. Revision history Date Revision 28-Mar-2006 5 14/15 Changes Order codes has been updated and new template. STLVDS31 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. Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no liability whatsoever relating to the choice, selection or use of the ST products and services described herein. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. 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