DS90LV027AH High Temperature LVDS Dual Differential Driver General Description Features The DS90LV027AH is a dual LVDS driver device optimized for high data rate and low power applications. The device is designed to support data rates in excess of 600Mbps (300MHz) utilizing Low Voltage Differential Signaling (LVDS) technology. The DS90LV027AH is a current mode driver allowing power dissipation to remain low even at high frequency. In addition, the short circuit fault current is also minimized. The device is in a 8-lead small outline package. The DS90LV027AH has a flow-through design for easy PCB layout. The differential driver outputs provides low EMI with its typical low output swing of 360 mV. It is perfect for high speed transfer of clock and data. The DS90LV027AH can be paired with its companion dual line receiver, the DS90LV028AH, or with any of National’s LVDS receivers, to provide a high-speed point-to-point LVDS interface. n n n n n n n n n n −40˚C to +125˚C operating temperature range > 600 Mbps (300MHz) switching rates 0.3 ns typical differential skew 0.7 ns maximum differential skew 3.3V power supply design Low power dissipation (46 mW @ 3.3V static) Flow-through design simplifies PCB layout Power Off Protection (outputs in high impedance) Conforms to TIA/EIA-644 Standard 8-Lead SOIC package saves space Connection Diagram Dual-In-Line 20165101 Order Number DS90LV027AHM See NS Package Number M08A Functional Diagram 20165102 20165103 © 2005 National Semiconductor Corporation DS201651 www.national.com DS90LV027AH High Temperature LVDS Dual Differential Driver September 2005 DS90LV027AH Absolute Maximum Ratings (Note 1) ESD Ratings Supply Voltage (VCC) −0.3V to +4V Input Voltage (DI) −0.3V to +3.6V Output Voltage (DO ± ) −0.3V to +3.9V ≥ 1000V (CDM) ≥ 1000V Min Typ Max Supply Voltage (VCC) 3.0 3.3 3.6 V Temperature (TA) −40 25 +125 ˚C 9.5 mW/˚C above +25˚C Storage Temperature Range −65˚C to +150˚C Lead Temperature Range Soldering (4 sec.) ≥ 4kV Recommended Operating Conditions 1190 mW Derate M Package (EIAJ 0 Ω, 200 pF) (IEC direct 330 Ω, 150 pF) Maximum Package Power Dissipation @ +25˚C M Package ≥ 8kV (HBM 1.5 kΩ, 100 pF) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Units +260˚C Electrical Characteristics Over Supply Voltage and Operating Temperature ranges, unless otherwise specified. (Notes 2, 3, 7) Symbol Parameter Conditions Pin Min Typ Max Units DO+, DO− 250 360 450 mV 1 35 mV 1.4 1.6 DIFFERENTIAL DRIVER CHARACTERISTICS VOD Output Differential Voltage ∆VOD VOD Magnitude Change RL = 100Ω (Figure 1) VOH Output High Voltage VOL Output Low Voltage VOS Offset Voltage ∆VOS Offset Magnitude Change IOXD Power-off Leakage IOSD Output Short Circuit Current VIH Input High Voltage VIL Input Low Voltage IIH Input High Current VIN = 3.3V or 2.4V IIL Input Low Current VIN = GND or 0.5V VCL Input Clamp Voltage ICL = −18 mA ICC Power Supply Current No Load 0.9 1.1 1.125 1.2 0 VOUT = VCC or GND, VCC = 0V DI V mV 3 25 ± 10 µA −5.7 −8 mA VCC V 2.0 0.8 V ± 10 ± 10 µA 8 14 mA 14 20 mA ±2 ±1 −1.5 1.375 ±1 GND VIN = VCC or GND V V µA −0.6 VCC RL = 100Ω V Switching Characteristics Over Supply Voltage and Operating Temperature Ranges, unless otherwise specified. (Notes 3, 4, 5, 6) Symbol Parameter Conditions Min Typ Max Units ns DIFFERENTIAL DRIVER CHARACTERISTICS tPHLD Differential Propagation Delay High to Low RL = 100Ω, CL = 15 pF 0.3 0.8 2.0 tPLHD Differential Propagation Delay Low to High (Figure 2 and Figure 3) 0.3 1.1 2.0 ns tSKD1 Differential Pulse Skew |tPHLD − tPLHD| (Note 8) 0 0.3 0.7 ns 0.4 tSKD2 Channel to Channel Skew (Note 9) 0 0.8 ns tSKD3 Differential Part to Part Skew (Note 10) 0 1.0 ns tSKD4 Differential Part to Part Skew (Note 11) 0 1.2 ns tTLH Transition Low to High Time 0.2 0.5 1.0 ns tTHL Transition High to Low Time 0.2 0.5 1.0 fMAX Maximum Operating Frequency (Note 12) 350 ns MHz Note 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 devices should be operated at these limits. The table of “Electrical Characteristics” specifies conditions of device operation. Note 2: Current into device pins is defined as positive. Current out of device pins is defined as negative. All voltages are referenced to ground except VOD. Note 3: All typicals are given for: VCC = +3.3V and TA = +25˚C. Note 4: These parameters are guaranteed by design. The limits are based on statistical analysis of the device over PVT (process, voltage, temperature) ranges. Note 5: CL includes probe and fixture capacitance. www.national.com 2 (Continued) Note 6: Generator waveform for all tests unless otherwise specified: f = 1 MHz, ZO = 50Ω, tr ≤ 1 ns, tf ≤ 1 ns (10%-90%). Note 7: The DS90LV027AH is a current mode device and only function with datasheet specification when a resistive load is applied to the drivers outputs. Note 8: tSKD1, |tPHLD − tPLHD|, is the magnitude difference in differential propagation delay time between the positive going edge and the negative going edge of the same channel. Note 9: tSKD2 is the Differential Channel to Channel Skew of any event on the same device. Note 10: tSKD3, Differential Part to Part Skew, is defined as the difference between the minimum and maximum specified differential propagation delays. This specification applies to devices at the same VCC and within 5˚C of each other within the operating temperature range. Note 11: tSKD4, part to part skew, is the differential channel to channel skew of any event between devices. This specification applies to devices over recommended operating temperature and voltage ranges, and across process distribution. tSKD4 is defined as |Max − Min| differential propagation delay. Note 12: fMAX generator input conditions: tr = tf < 1 ns (0% to 100%), 50% duty cycle, 0V to 3V. Output criteria: duty cycle = 45%/55%, VOD > 250mV, all channels switching. Parameter Measurement Information 20165104 FIGURE 1. Differential Driver DC Test Circuit 20165105 FIGURE 2. Differential Driver Propagation Delay and Transition Time Test Circuit 20165106 FIGURE 3. Differential Driver Propagation Delay and Transition Time Waveforms 3 www.national.com DS90LV027AH Switching Characteristics DS90LV027AH Application Information TABLE 1. Device Pin Descriptions Pin # Name Description 2, 3 DI TTL/CMOS driver input pins 6, 7 DO+ Non-inverting driver output pin 5, 8 DO− Inverting driver output pin 4 GND Ground pin 1 VCC Positive power supply pin, +3.3V ± 0.3V Typical Performance Curves Output High Voltage vs Power Supply Voltage Output Low Voltage vs Power Supply Voltage 20165107 20165108 Output Short Circuit Current vs Power Supply Voltage Differential Output Voltage vs Power Supply Voltage 20165110 20165109 www.national.com 4 DS90LV027AH Typical Performance Curves (Continued) Differential Output Voltage vs Load Resistor Offset Voltage vs Power Supply Voltage 20165111 20165112 Power Supply Current vs Frequency Power Supply Current vs Power Supply Voltage 20165114 20165113 5 www.national.com DS90LV027AH Typical Performance Curves (Continued) Power Supply Current vs Ambient Temperature Differential Propagation Delay vs Power Supply Voltage 20165115 20165116 Differential Propagation Delay vs Ambient Temperature Differential Skew vs Power Supply Voltage 20165118 20165117 www.national.com 6 DS90LV027AH Typical Performance Curves (Continued) Differential Skew vs Ambient Temperature Transition Time vs Power Supply Voltage 20165119 20165120 Transition Time vs Ambient Temperature 20165121 7 www.national.com DS90LV027AH High Temperature LVDS Dual Differential Driver Physical Dimensions inches (millimeters) unless otherwise noted Order Number DS90LV027AHM NS Package Number M08A National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications. 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