DS1124 Rev 1 4/09 5.0V 8-Bit Programmable Timing Element General Description Features The DS1124 is an 8-bit programmable timing element 0.25ns Step Size similar in function to the DS1021-25. The 256-delay Leading- and Trailing-Edge Accuracy intervals are programmed by using a 3-wire serial inter- face. With a 0.25ns step size, the DS1124 can provide CMOS/TTL Compatible a delay time from 20ns up to 84ns with an integral non- Can Delay Signals by a Full Period or More linearity of 3ns. 3-Wire Serial Programming Interface Applications Single 5.0V Power Supply LCD Televisions 10-pin SOP Package Telecommunications Digital Test Equipment Digital Video Projection Signal Generators and Analyzers Pin Configuration Ordering Information PART TEMP RANGE PIN-PACKAGE TOP VIEW DS1124U-25+ -40C to +85C 10 SOP + IN 1 10 V DS1124U-25+T -40C to +85C 10 SOP CC E 2 9 V +Denotes a lead(Pb)-free/RoHS-compliant package. CC T = Tape and reel. Q 3 8 D DS1124 GND 4 7 CLK GND 5 6 OUT SOP Typical Operating Circuit V CC SYSTEM CLOCK IN V CC E OUT OPTIONAL Q VARIABLE DELAY DS1124 MICROPROCESSOR CLK D GND Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.5.0V 8-Bit Programmable Timing Element ABSOLUTE MAXIMUM RATINGS Voltage Range on V Pin Relative to Ground .....-0.5V to +6.0V Storage Temperature Range .............................-55C to +125C CC Voltage Range on IN, E, D, and CLK Short-Circuit Output Current..........................50mA for 1 second Relative to Ground* ................................-0.5V to (V + 0.5V) Soldering Temperature...................See J-STD-020 Specification CC Operating Temperature Range ...........................-40C to +85C *Not to exceed +6.0V. Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. RECOMMENDED OPERATING CONDITIONS (T = -40C to +85C) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Voltage V (Note 1) 4.75 5.25 V CC V + CC Input Logic 1 V 2.2 V IH 0.3 Input Logic 0 V -0.3 +0.8 V IL DC ELECTRICAL CHARACTERISTICS (V = +4.75V to +5.25V, T = -40C to +85C, unless otherwise noted.) CC A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Active Current I 15 30 mA CCA High-Level Output Current I V = min, V = 2.3V -1.0 mA OH CC OH Q pin, V = min, V = 0.5V 4.0 CC OL Low-Level Output Current I mA OL OUT pin, V = min, V = 0.5V 8.0 CC OL Input Leakage I -1.0 +1.0 A L AC ELECTRICAL CHARACTERISTICS (V = +4.75V to +5.25V, T = -40C to +85C, unless otherwise noted.) CC A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Serial Clock Frequency f 10 MHz CLK Input Pulse Width (E, CLK) t , t 50 ns EW CW Data Setup to Clock t 30 ns DSC Data Hold from Clock t 0 ns DHC Data Setup to Enable t 30 ns DSE Data Hold to Enable t 0 ns DHE Enable Setup to Clock t 0 ns ES Enable Hold from Clock t 30 ns EH E to Q Valid t 50 ns EQV E to Q High Impedance t 0 50 ns EQZ CLK to Q Valid t 50 ns CQV CLK to Q Invalid t 0 ns CQX 2 DS1124