LSI/CSI UL ® RED SERIES LSI Computer Systems, Inc. 1235 Walt Whitman Road, Melville, NY 11747 (631) 271-0400 FAX (631) 271-0405 A3800 AC LINE FREQUENCY DIVIDERS July 2000 FEATURES: • Clock input pulse shaper accepts 50Hz/60Hz sine wave directly • Fully static counter operation • +4.5V to +15V operation (VDD - VSS) • Low power dissipation • High noise immunity • Reset • Input Enable • 50Hz/60Hz division select input • Output low power TTL compatible at +4.5V operation • Square Wave Output (except for ÷ 5) • RED x/y (DIP); RED x/y-S (SOIC) See Figure 1 APPLICATION: Time base generator from either 50Hz or 60Hz line frequency to produce: 10 pulses per second 1 pulse per second 1 pulse per 2 seconds 1 pulse per .1 minute 1 pulse per 10 seconds 1 pulse per minute (RED 5/6) (RED 50/60) (RED 100/120) (RED 300/360) (RED 500/600) (RED 3000/3600) DESCRIPTION OF OPERATION: The counter advances by one on each negative transition of the input clock pulse as long as the Enable signal is High and the Reset signal is Low. When the Enable signal is Low the input clock pulses will be inhibited and the counter will be held at the state it was in prior to bringing the Enable Low. A High Reset signal clears the counter to zero count. Depending on the device used, a Low on the Division Select input will cause a Divide by 6, 60, 120, 360, 600 or 3600. A High on the Division Select will cause a Divide by 5, 50, 100, 300, 500 or 3000. PIN ASSIGNMENT - TOP VIEW 8 V DD (V+) 2 7 DIVISION SELECT 3 6 ENABLE OUTPUT 1 RESET V SS (-V) NC LSI RED SERIES RED 5/6 Divide by 5 or 6 RED 50/60 Divide by 50 or 60 RED 100/120 Divide by 100 or 120 RED 300/360 Divide by 300 or 360 RED 500/600 Divide by 500 or 600 RED 3000/3600 Divide by 3000 or 3600 4 5 CLOCK INPUT FIGURE 1 MARKING AS FOLLOWS: PART MARKING RED 5/6 RED 50/60 RED 100/120 RED 300/360 RED 500/600 RED 3000/3600 RED 6 RED 60 RED 120 RED 360 RED 600 RED 3600 MAXIMUM RATINGS: PARAMETER SYMBOL VALUE UNIT Storage Temperature TSTG -65 to +150 ˚C Operating Temperature TA -40 to +85 ˚C DC Supply Voltage (VDD-Vss) +18 V Voltage at any input VIN Vss -.3 to VDD +.3 V ENABLE SIGNAL TIMING If the Enable signal switches Low during a positive clock phase and then switches High during a negative clock phase, a false count will be registered. To prevent this from happening, the Enable signal should not switch Low during a positive clock phase unless the switch to High also occurs during a positive clock phase. The Enable signal should normally be switched during a negative clock phase. All outputs are 50% duty cycle except RED 5, where output is low for two clocks and high for three clocks. CLOCK INPUT If input signals are less than the Vss or greater than VDD, a series input resistor should be used to limit the maximum input current to 2 mA. RED-062600-1 The information included herein is believed to be accurate and reliable. However, LSI Computer Systems, Inc. assumes no responsibilities for inaccuracies, nor for any infringements of patent rights of others which may result from its use. ELECTRICAL CHARACTERISTICS: (TA = 25° unless otherwise specified) TEST CONDITIONS: Vss = OV Output Capacitance Load = 15 pF Input Rise and Fall times = 20 ns, except clock Rise and Fall times Input Capacitance = 5pF max (any input) VDD Min Max Quiescent Device Current 5V 10 10V 20 Output Voltage, Low Level 5V 0.0 10V 0.0 High Level 5V 4.99 10V 9.99 Clock Input Voltage, Low Level 5V 1 10V 2 High Level 5V 4 10V 8 Input Noise Immunity (except clock) 5V 1.5 (Low and High) 10V 3.0 Output Drive Current Full N Channel Sink Current 4.5V 0.18 Temp. (Vout - Vss +.4v) 10V 0.45 Range P Channel Sink Current 4.5V 0.3 (Vout - VDD -1) 10V 0.75 - VDD 5V 10V 5V 10V MIN MAX No Maximum Limit No Maximum Limit DC 600 DC 1200 UNITS kHz kHz Input Clock Pulse Width 5V 10V 800 400 - ns ns Output Rise and Fall Time 5V 10V - 225 150 ns ns Propagation Delay to Output 5V 10V - 1500 750 ns ns Enable Set-up Time 5V 10V - 300 150 ns ns Reset Pulse Width 5V 10V 800 400 - ns ns Reset Removal Time 5V 10V - 1200 600 ns ns Reset Propagation Delay to Output 5V 10V - 1400 700 ns ns Clock Rise and Fall Time: Clock Frequency Units uA uA V V V V V V V V V V mA mA mA mA E E PULSE SHAPER ENABLE 6 INPUT CLOCK GENERATOR E CL CL IN 5 CL E R RESET 2 R DIVISION SELECT 7 DS +4.5V to +15V 8 VDD GND 3 VSS N/C 4 RED 5/6,50/60, 300/360,3000/3600 1 D5/6 1 D50/60 DS CL1 CL CL 3 BIT JOHNSON +5/6 CL1 CL2 3 BIT JOHNSON ÷10 CL2 3 BIT JOHNSON ÷6 CL3 CL3 5 BIT JOHNSON ÷10 1 D3000/3600 1 D300/360 1 D100/120 R RED 100/120 DS CL CL 3 BIT JOHNSON +5/6 CL1 CL1 5 BIT JOHNSON ÷10 CL2 CL2 1 BIT ÷2 R RED 500/600 CL CL R RED-062600-2 DS 3 BIT JOHNSON +5/6 CL2 CL1 CL1 5 BIT JOHNSON ÷10 CL2 5 BIT JOHNSON ÷10 1 FIGURE 2. BLOCK DIAGRAM D500/600