DS1044R-25+

DS1044 DS1044 4–in–1 High–Speed Silicon Delay Line FEATURES PIN ASSIGNMENT • All–silicon timing circuit IN1 1 14 VCC NC 2 13 NC IN2 3 12 OUT1 IN3 4 11 NC IN4 5 10 OUT2 NC 6 9 OUT3 GND 7 8 OUT4 • Four independent buffered delays • Initial delay tolerance ±1.5 ns • Stable and precise over temperature and voltage • Leading and trailing edge precision preserves the input symmetry • Standard 14–pin DIP, 14–pin SOIC (150 mil) DS1044 14–PIN DIP DS1044R 14–PIN SOIC (150 MIL) See Mech. Drawings Section • Vapor phase, IR and wave solderable • Available in Tape and Reel PIN DESCRIPTION IN1–IN4 OUT1–OUT4 NC VCC GND – – – – – Input Signals Output Signals No Connection +5 Volt Supply Ground DESCRIPTION The DS1044 series is a 4–in–1 version of the low– power, +5 Volt, high speed, DS1035. The DS1044 series of delay lines have four independent logic buffered delays in a single package. The device is Dallas Semiconductor’s fastest 4–in–1 delay line. It is available in a standard 14–pin DIP and 14–pin SOIC. delay line solution. The DS1044’s nominal tolerance is ±1.5 ns and an additional tolerance over temperature and voltage of ±1.0 ns for the faster delays. Each output is capable of driving up to 10 LS loads. Standard delay values are indicated in Table 1. Customers may contact Dallas Semiconductor at (972) 371–4348 for further information. The device features precise leading and trailing edge accuracies. It has the inherent reliability of an all–silicon 021798 1/6 DS1044 LOGIC DIAGRAM Figure 1 IN OUT TIME DELAY ONE OF FOUR PART NUMBER DELAY TABLE (tPLH, tPHL) Table 1 PART NUMBER DELAY PER OUTPUT (ns) INITIAL TOLERANCE TOLERANCE OVER (temp and voltage) DS1044–5 5 ±1.5 ns ±1.0 ns DS1044–6 6 ±1.5 ns ±1.0 ns DS1044–7 7 ±1.5 ns ±1.0 ns DS1044–8 8 ±1.5 ns ±1.0 ns DS1044–10 10 ±1.5 ns ±1.0 ns DS1044–12 12 ±1.5 ns ±1.0 ns DS1044–14 14 ±1.5 ns ±1.5 ns DS1044–18 18 ±1.5 ns ±1.5 ns DS1044–20 20 ±1.5 ns ±1.5 ns DS1044–25 25 ±2.0 ns ±1.5 ns NOTES: 1. Nominal conditions are +25°C and VCC=+5.0 volts. 2. Temperature range of 0°C to 70°C and voltage range of 4.75 volts to 5.25 volts. 3. Delay accuracy are for both leading and trailing edges. 021798 2/6 DS1044 TEST SETUP DESCRIPTION Figure 2 illustrates the hardware configuration used for measuring the timing parameters of the DS1044. 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 to the output. The DS1044 output taps are selected and connected to the interval counter by a VHF switch control unit. All measurements are fully automated with each instrument controlled by the computer over an IEEE 488 bus. DS1044 TEST CIRCUIT Figure 2 PULSE GENERATOR START 4 INPUTS TIME INTERVAL COUNTER 50Ω STOP VHF SWITCH CONTROL UNIT UNIT UNDER TEST OUT 50Ω OUTPUTS 1–4 021798 3/6 DS1044 ABSOLUTE MAXIMUM RATINGS* Voltage on Any Pin Relative to Ground Operating Temperature Storage Temperature Soldering Temperature Short Circuit Output Current –1.0V to +7.0V 0°C to 70°C –55°C to +125°C 260°C for 10 seconds 50 mA for 1 second * This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operation sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability. (0°C to 70°C; VCC=+5V ± 5%) DC ELECTRICAL CHARACTERISTICS TEST CONDITION PARAMETER SYMBOL Supply Voltage VCC Active Current ICC High Level Input Voltage VIH Low Level Input Voltage VIL –1.0 Input Leakage MIN TYP MAX 4.75 5.00 5.25 V 45 mA 2.2 VCC+0.5 V –0.5 0.8 V 1.0 µA –1.0 mA VCC=5.25V Period=1µs IL 0V