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FIN1025 3.3V LVDS 2-Bit High Speed Differential Driver
June 2002 Revised June 2002
FIN1025 3.3V LVDS 2-Bit High Speed Differential Driver
General Description
This dual driver is designed for high speed interconnects utilizing Low Voltage Differential Signaling (LVDS) technology. The driver translates LVTTL signal levels to LVDS levels with a typical differential output swing of 350mV which provides low EMI at ultra low power dissipation even at high frequencies. This device is ideal for high speed transfer of clock and data. The FIN1025 can be paired with its companion receiver, the FIN1026, or any other LVDS receiver.
Features
s Greater than 400Mbs data rate s Flow-through pinout simplifies PCB layout s 3.3V power supply operation s 0.4ns maximum differential pulse skew s 1.7ns maximum propagation delay s Low power dissipation s Power-Off protection s Meets or exceeds the TIA/EIA-644 LVDS standard s 14-Lead TSSOP package saves space
Ordering Code:
Order Number FIN1025MTC Package Number MTC14 Package Description 14-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter "X" to the ordering code.
Connection Diagram
Pin Descriptions
Pin Name DIN1, DIN2, DOUT1+, DOUT2+ DOUT1-, DOUT2- EN EN VCC GND NC Description LVTTL Data Inputs Non-Inverting Driver Outputs Inverting Driver Outputs Driver Enable Pin Inverting Driver Enable Pin Power Supply Ground No Connect
Truth Table
Inputs EN H H H X L or OPEN
H = HIGH Logic Level L = LOW Logic Level X = Don't Care Z = High Impedance
Outputs DIN H L OPEN X X DOUT+ H L L Z Z DOUT- L H H Z Z
EN L or OPEN L or OPEN L or OPEN H X
(c) 2002 Fairchild Semiconductor Corporation
DS500783
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FIN1025
Absolute Maximum Ratings(Note 1)
Supply Voltage (VCC) LVTTL DC Input Voltage (VIN) LVDS DC Output Voltage (VOUT) Driver Short Circuit Current (IOSD) Storage Temperature Range (TSTG) Max Junction Temperature (TJ) Lead Temperature (TL) (Soldering, 10 seconds) ESD (Human Body Model) ESD (Machine Model) 10,000V 600V
-0.5V to +4.6V -0.5V to +6V -0.5V to 4.6V
Continuous
Recommended Operating Conditions
Supply Voltage (VCC) Input Voltage (VIN) Operating Temperature (TA) 3.0V to 3.6V 0 to VCC
-40C to +85C
-65C to +150C
150C 260C
Note 1: The "Absolute Maximum Ratings": are those values beyond which damage to the device may occur. The databook specifications should be met, without exception, to ensure that the system design is reliable over its power supply, temperature and output/input loading variables. Fairchild does not recommend operation of circuits outside databook specification.
DC Electrical Characteristics
Over supply voltage and operating temperature ranges, unless otherwise specified
Symbol VOD VOD VOS VOS VOH VOL IOFF IOS VIH VIL IIN IOZ II(OFF) VIK ICC Parameter Output Differential Voltage VOD Magnitude Change from Differential LOW-to-HIGH Offset Voltage Offset Magnitude Change from Differential LOW-to-HIGH HIGH Output Voltage LOW Output Voltage Power Off Output Current Short Circuit Output Current Input HIGH Voltage Input LOW Voltage Input Current Disabled Output Leakage Current Power-Off Input Current Input Clamp Voltage Power Supply Current VIN = 0V or VCC VOUT = 0V or 3.6V VCC = 0V, VIN = 0V or 3.6V IIK = -18 mA No Load, VIN = 0V or VCC, Driver Enabled RL = 100 , Driver Disabled RL = 100 , VIN = 0V or VCC, Driver Enabled
Note 2: All typical values are at TA = 25C and with VCC = 3.3V.
Test Conditions
Min 250
Typ (Note 2) 340 1.4
Max 450 25 1.375 25 1.6 20
Units mV mV V mV V V A mA V V A A A V
RL = 100, Driver Enabled, See Figure 1 1.125
1.25 1.2
VIN = VCC, RL = 100 VIN = 0V, RL = 100 VCC = 0V, VOUT = 0V or 3.6V VOUT = 0V, Driver Enabled VOD = 0V, Driver Enabled 2.0 GND -20 -20 -20 -1.5 0.9 -20
1.4 1.05 -3 -3.5
-6 -6 VCC 0.8 20 20 20
-0.8 5 1.7 9 8 4 16
mA
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FIN1025
AC Electrical Characteristics
Over supply voltage and operating temperature ranges, unless otherwise specified
Symbol tPLHD tPHLD tTLHD tTHLD tSK(P) tSK(LH) tSK(HL) tSK(PP) fMAX tZHD tZLD tHZD tLZD CIN COUT Parameter Differential Propagation Delay LOW-to-HIGH Differential Propagation Delay HIGH-to-LOW Differential Output Rise Time (20% to 80%) Differential Output Fall Time (80% to 20%) Pulse Skew |tPLH - tPHL| Channel-to-Channel Skew (Note 4) Part-to-Part Skew (Note 5) Maximum Frequency (Note 6) Differential Output Enable Time from Z to HIGH Differential Output Enable Time from Z to LOW RL = 100, CL = 10 pF, Differential Output Disable Time from HIGH to Z See Figure 4 (Note 7), and Figure 5 Differential Output Disable Time from LOW to Z Input Capacitance Output Capacitance RL = 100, See Figure 6 (Note 7) 200 250 1.7 1.7 2.7 2.7 4.2 5.2 5.0 5.0 5.0 5.0 0.05 RL = 100 , CL = 10 pF, See Figure 2 (Note 7), and Figure 3 Test Conditions Min Typ (Note 3) 0.6 0.6 0.4 0.4 1.1 1.2 1.7 1.7 1.2 1.2 0.4 0.3 1.0 Max Units ns ns ns ns ns ns ns MHz ns ns ns ns pF pF
Note 3: All typical values are at TA = 25C and with VCC = 3.3V. Note 4: tSK(LH), tSK(HL) is the skew between specified outputs of a single device when the outputs have identical loads and are switching in the same direction. Note 5: tSK(PP) is the magnitude of the difference in propagation delay times between any specified terminals of two devices switching in the same direction (either LOW-to-HIGH or HIGH-to-LOW) when both devices operate with the same supply voltage, same temperature, and have identical test circuits. Note 6: fMAX criteria: Input tR = tF < 1ns, 0V to 3V, 50% Duty Cycle; Output VOD > 250 mv, 45% to 55% Duty Cycle; all switching in phase channels. Note 7: Test Circuits in Figures 2, 4, 6 are simplified representations of test fixture and DUT loading.
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FIN1025
Note A: All input pulses have frequency = 10 MHz, tR or tF = 1 ns Note B: C L includes all fixture and instrumentation capacitance
FIGURE 1. Differential Driver DC Test Circuit
FIGURE 2. Differential Driver Propagation Delay and Transition Time Test Circuit
Note B: All input pulses have the frequency = 10 MHz, tR or tF = 1 ns Note A: C L includes all fixture and instrumentation capacitance
FIGURE 3. AC Waveforms
FIGURE 4. Differential Driver Enable and Disable Test Circuit
FIGURE 5. Enable and Disable AC Waveforms
FIGURE 6. fMAX Test Circuit
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FIN1025
DC / AC Typical Performance Curves
FIGURE 7. Output High Voltage vs. Power Supply Voltage
FIGURE 8. Output Low Voltage vs. Power Supply Voltage
FIGURE 9. Output Short Circuit Current vs. Power Supply Voltage
FIGURE 10. Differential Output Voltage vs. Power Supply Voltage
FIGURE 11. Differential Output Voltage vs. Load Resistor
FIGURE 12. Offset Voltage vs. Power Supply Voltage
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FIN1025
DC / AC Typical Performance Curves
(Continued)
FIGURE 13. Differential Propagation Delay vs. Power Supply Voltage
FIGURE 14. Differential Propagation Delay vs. Ambient Temperature
FIGURE 15. Differential Pulse Skew (tPLH - tPHL) vs. Power Supply Voltage
FIGURE 16. Differential Pulse Skew (tPLH - tPHL) vs. Ambient Temperature
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FIN1025 3.3V LVDS 2-Bit High Speed Differential Driver
Physical Dimensions inches (millimeters) unless otherwise noted
14-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide Package Number MTC14
Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right at any time without notice to change said circuitry and specifications. LIFE SUPPORT POLICY FAIRCHILD'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. 7 2. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. www.fairchildsemi.com
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