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| DS1000 5-Tap Silicon Delay Line www.dalsemi.com FEATURES All-silicon time delay 5 taps equally spaced Delays are stable and precise Both leading and trailing edge accuracy Delay tolerance 5% or 2 ns, whichever is greater Low-power CMOS TTL/CMOS-compatible Vapor phase, IR and wave solderable Custom delays available Fast turn prototypes Extended temperature range available (DS1000-IND) IN NC NC TAP 2 NC TAP 4 GND PIN ASSIGNMENT 1 2 3 4 5 6 7 14 13 12 11 10 9 8 VCC NC TAP 1 TAP 4 NC GND TAP 3 NC TAP 5 1 2 3 4 8 7 6 5 VCC TAP 1 TAP 3 TAP 5 4 5 TAP 5 3 6 TAP 3 IN TAP 2 1 2 8 7 VCC TAP 1 DS1000M 8-Pin DIP (300-mil) See Mech. Drawings Section IN DS1000 14-Pin DIP (300-mil) See Mech. Drawings Section TAP 2 TAP 4 GND DS1000Z 8-Pin SOIC (150-mil) See Mech. Drawings Section PIN DESCRIPTION TAP 1-TAP 5 VCC GND NC IN - TAP Output Number - +5 Volts - Ground - No Connection - Input DESCRIPTION The DS1000 series delay lines have five equally spaced taps providing delays from 4 ns to 500 ns. These devices are offered in a standard 14-pin DIP that is pin-compatible with hybrid delay lines. Alternatively, 8-pin DIPs and surface mount packages are available to save PC board area. Low cost and superior reliability over hybrid technology is achieved by the combination of a 100% silicon delay line and industry standard DIP and SOIC packaging. In order to maintain complete pin compatibility, DIP packages are available with hybrid lead configurations. The DS1000 series delay lines provide a nominal accuracy of 5% or 2 ns, whichever is greater. The DS1000 5-Tap Silicon Delay Line reproduces the input logic state at the output after a fixed delay as specified by the extension of the part number after the dash. The DS1000 is designed to reproduce both leading and trailing edges with equal precision. Each tap is capable of driving up to ten 74LS loads. Dallas Semiconductor can customize standard products to meet special needs. For special requests and rapid delivery, call 972-371-4348. 1 of 5 111799 DS1000 LOGIC DIAGRAM Figure 1 DS1000 PART NUMBER DELAY TABLE (all values in ns) Table 1 PART # DS1000- Nom 4 5 6 7 8 9 10 12 15 20 25 30 35 40 50 100 -20 -25 -30 -35 -40 -45 -50 -60 -75 -100 -125 -150 -175 -200 -250 -500 TAP 1 TOLERANCE Init Temp 2 1 2 1 2 1 2 1 2 1 2 1 2 1 2 1 2 1 2 1 2 1 2 1 2 1.1 2 1.2 2.5 1.5 5 3 Nom 8 10 12 14 16 18 20 24 30 40 50 60 70 80 100 200 TAP 2 TOLERANCE Init Temp 2 1 2 1 2 1 2 1 2 1 2 1 2 1 2 1 2 1 2 1.2 2.5 1.5 3 1.8 3.5 2.1 4 2.4 5 3 10 6 Nom 12 15 18 21 24 27 30 36 45 60 75 90 105 120 150 300 TAP 3 TOLERANCE Init Temp 2 1 2 1 2 1 2 1 2 1 2 1 2 1 2 1.1 2.3 1.4 3 1.8 3.8 2.3 4.5 2.7 5.3 3.2 6 3.6 7.5 4.5 15 9 Nom 16 20 24 28 32 36 40 48 60 80 100 120 140 160 200 400 TAP 4 TOLERANCE Init Temp 2 1 2 1 2 1 2 1 2 1 2 1.1 2 1.2 2.4 1.5 3 1.8 4 2.4 5 3 6 3.6 7 4.2 8 4.8 10 6 20 12 Nom 20 25 30 35 40 45 50 60 75 100 125 150 175 200 250 500 TAP 5 TOLERANCE Init Temp 2 1 2 1 2 1 2 1.1 2 1.2 2.3 1.4 2.5 1.5 3 1.8 3.8 2.3 5 3 6.3 3.8 7.5 4.5 8.8 5.3 10 6 12.5 7.5 25 15 DC ELECTRICAL CHARACTERISTICS PARAMETER Supply Voltage High Level Input Voltage Low Level Input Voltage Input Leakage Current Active Current High Level Output Current Low Level Output Current SYM VCC VIH VIL II ICC IOH IOL 0.0V VI VCC VCC=Max; Period=Min. VCC=Min. VOH=4 VCC=Min. VOL=0.5 TEST CONDITION MIN 4.75 2.2 -0.5 -1.0 (0C to 70C; VCC = 5.0V 5%) TYP 5.00 MAX 5.25 VCC + 0.5 0.8 1.0 35 75 -1 12 UNITS V V V uA mA mA mA 7, 9 NOTES 6 6 6 AC ELECTRICAL CHARACTERISTICS PARAMETER Input Pulse Width Input to Tap Delay (leading edge) Input to Tap Delay (trailing edge) Power-up Time Input Period SYMBOL tWI tPLH tPHL tPU Period MIN 40% of Tap 5 tPLH (TA = 25C; VCC = 5V 5%) TYP Table 1 Table 1 100 MAX UNITS ns ns ns ms ns NOTES 8 1, 2, 3, 4, 5, 10 1, 2, 3, 4, 5, 10 8 4 (tWI) 2 of 5 DS1000 CAPACITANCE PARAMETER Input Capacitance SYMBOL CIN MIN TYP 5 MAX 10 (TA = 25C) UNITS pF NOTES NOTES: 1. Initial tolerances are =with respect to the nominal value at 25C and 5V. 2. Temperature tolerance is =with respect to the initial delay value over a range of 0C to 70C. 3. The delay will also vary with supply voltage, typically by less than 4% over the range 4.75 to 5.25V. 4. All tap delays tend to vary uni-directionally with temperature or voltage changes. For example, if TAP 1 slows down, all other taps also slow down; TAP3 can never be faster than TAP2. 5. Intermediate delay values and packaging variations are available on a custom basis. For further information, call 972-371-4348. 6. All voltages are referenced to ground. 7. Measured with outputs open. 8. Pulse width and period specifications may be exceeded; however, accuracy may be impaired depending on application (decoupling, layout, etc.). The device will remain functional with pulse widths down to 20% of Tap 5 delay, and input periods as short as 2(tWI). 9. ICC is a function of frequency and TAP 5 delay. Only a -25 operating with a 40-ns period and VCC = 5.25V will have an ICC = 75 mA. For example a -100 will never exceed 30 mA, etc. 10. See "Test Conditions" section at the end of this data sheet. TIMING DIAGRAM: SILICON DELAY LINE Figure 2 3 of 5 DS1000 TEST CIRCUIT Figure 3 TERMINOLOGY Period: The time elapsed between the leading edge of the first pulse and the leading edge of the following pulse. tWI (Pulse Width): The elapsed time on the pulse between the 1.5V point on the leading edge and the 1.5V point on the trailing edge or the 1.5V point on the trailing edge and the 1.5V point on the leading edge. tRISE (Input Rise Time): The elapsed time between the 20% and the 80% point on the leading edge of the input pulse. tFALL (Input Fall Time): The elapsed time between the 80% and the 20% point on the trailing edge of the input pulse. tPLH (Time Delay, Rising): The elapsed time between the 1.5V point on the leading edge of the input pulse and the 1.5V point on the leading edge of any tap output pulse. tPHL (Time Delay, Falling): The elapsed time between the 1.5V point on the trailing edge of the input pulse and the 1.5V point on the trailing edge of any tap output pulse. TEST SETUP DESCRIPTION Figure 3 illustrates the hardware configuration used for measuring the timing parameters on the DS1000. The input waveform is produced by a precision pulse generator under software control. Time delays are measured by a time interval counter (20 ps resolution) connected between the input and each tap. Each tap is selected and connected to the counter by a VHF switch control unit. All measurements are fully automated, with each instrument controlled by a central computer over an IEEE 488 bus. 4 of 5 DS1000 TEST CONDITIONS INPUT: Ambient Temperature: Supply Voltage (VCC): Input Pulse: Source Impedance: Rise and Fall Time: Pulse Width: Period: 25C =3C 5.0V =0.1V High = 3.0V =0.1V Low = 0.0V =0.1V 50 ohm Max. 3.0 ns Max. (measured between 0.6V and 2.4V) 500 ns (1 s for -500) 1 s (2 s for -500) OUTPUT: Each output is loaded with the equivalent of one 74F04 input gate. Delay is measured at the 1.5V level on the rising and falling edge. NOTE: Above conditions are for test only and do not restrict the operation of the device under other data sheet conditions. 5 of 5 |
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