LSI/CSI UL ® RDD106 LSI Computer Systems, Inc. 1235 Walt Whitman Road, Melville, NY 11747 (631) 271-0400 FAX (631) 271-0405 A3800 July 2005 SELECTABLE 6 DECADE CMOS DIVIDER • • PIN ASSIGNMENT - TOP VIEW 1 DIVIDER SELECT-2 2 V SS (-V) 3 RESET 4 The Output Division is selected according to the following truth table: DIVIDER SELECT INPUTS: SELECT 2 SELECT 1 *1 F *0 F 0 0 0 1 1 0 1 1 *Note: Not valid below 4.5V OUTPUT DIVISION 1,000,000 100,000 10,000 1,000 100 10 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. RDD106-072605-1 RDD 106 DIVIDER SELECT-1 8 V DD (+V) 7 OUTPUT 6 CLOCK OUTPUT 5 CLOCK INPUT FIGURE 1 MAXIMUM RATINGS: PARAMETER DESCRIPTION OF OPERATION: The RDD106 is a CMOS six decade divider circuit that advances on each negative transition of the input clock pulse. When the reset input is high the circuit is cleared to zero. The clock input is applied to a single stage inverting amplifier network whose output is brought out so that an external crystal network can be used to form an oscillator circuit. If the clock output is not used, the amplifier acts as an input buffer. Two select inputs are provided which enables the circuit to divide by 101, 102, 103, 104, 105 or 106. LSI • • • • • • • • • FEATURES: Selectable Divide by 101, 102, 103, 104, 105 or 106 Clock Input Shaping Network Accepts Fast or Slow Edge Inputs Active Oscillator Network for External Crystal Square Wave Output Output TTL Compatible at +4.5V Operation High Noise Immunity Reset All Inputs Protected +3V to +15V Operation (VDD - VSS) Low Power Dissipation RDD106 (DIP); RDD106-S (SOIC) - See Figure 1 - SYMBOL VALUE UNIT Storage Temperature TSTG -65 to +150 Operating Temperature TA -40 to +85 DC Supply Voltage (VDD - VSS) +18 Voltage at any input VIN VSS - 0.3 to VDD + 0.3 °C °C V V DC ELECTRICAL CHARACTERISTICS: (All voltages referenced to VSS ) Quiescent Current (Pin 1 = VDD) VDD 4.5V 10V Quiescent Current (Pin 1 = F) Quiescent Current (Pin 1 = VSS) Output Voltage, Low Level -40°C +25°C 2.0 1.5 3.0 2.5 +85°C 1.0 2.0 UNIT uA Max uA Max 4.5V 10V 4.5V 10V 4.5V 10V High Level 4.5V 10V Pin1 Sink / Source Current 4.5V (Pin 1 = VSS / VDD) 10V Input Noise Immunity 4.5V (Low and High) 10V 4.5 25 11 50 0.01 0.01 4.49 9.99 8 46 1.3 3.0 3.0 18 8.0 39 0.01 0.01 4.49 9.99 6 36 1.3 3.0 2.5 15 6.0 30 0.05 0.05 4.45 9.95 5 29 1.3 3.0 uA Max uA Max uA Max uA Max V Min V Min V Max V Max uA Max uA Max V Min V Min Output Drive Current: N-Channel Sink Current (VOUT = VSS + 0.4V) 4.5V 10V 2.5 7.0 2.0 5.5 1.5 4.0 mA Min mA Min P-Channel Source Current 4.5V (VOUT = VDD - 1V) 10V 3.0 7.7 2.5 6.0 1.8 4.5 mA Min mA Min Input Capacitance (any input) - 5.0 - pF Max DYNAMIC ELECTRICAL CHARACTERISTICS: PIN 5 (CL = 50 pF, TA = 25°C) VDD 3.0V 4.5V 10V 15V MIN 0 0 0 0 MAX 5 10 20 30 UNIT MHz MHz MHz MHz Clock Output Propagation Delay, CL = 15pF 4.5V 10V - 30 15 ns ns Output Rise & Fall Times 4.5V 10V - 40 20 ns ns Propagation Delay to Output (per decade) 4.5V 10V - 160 75 ns ns Reset Pulse Width 4.5V 10V 160 75 - ns ns Reset Removal Time 4.5V 10V - 160 75 ns ns Reset Propagation Delay to Output 4.5V 10V - 200 100 ns ns Select Input Setup Time 4.5V 10V - 100 50 ns ns Clock Input Frequency 10pF 10M PIN 6 10pF FIGURE 2. TYPICAL OSCILLATOR CIRCUIT - 10MHz TO 30MHz PIN 5 22pF 10M 22K 40pF PIN 6 FIGURE 3. TYPICAL OSCILLATOR CIRCUIT WITH TRIM - 2 MHz AND BELOW PIN 5 10M Freq 5MHz 10MHz 20MHz 30MHz Dynamic VDD Current 22pF 3.0V 4.5V 10V 15V - 0.3 1.0 6.5 17 mA mA mA mA 40pF 22pF PIN 6 FIGURE 4. TYPICAL OSCILLATOR CIRCUIT WITH TRIM - 2MHz TO 10MHz V DD FIGURE 5. TYPICAL INPUT If input signals are less than VSS or greater than VDD, a series input resistor, R1, should be used to limit the maximum input current to 2 milliamperes. R1 CLOCK INPUT SIGNAL 5 V SS V SS 5 CLOCK IN +V 8 V DD -V 3 V SS FIGURE 6. OSCILLATOR EXTERNAL COMPONENTS RDD 106 BLOCK DIAGRAM CLOCK GENERATOR R ÷ 10 ÷ 10 ÷ 10 ÷ 10 ÷ 10 ÷ 10 6 CLOCK OUT RESET 4 DIVIDER SELECT-1 1 DIVIDER SELECT-2 2 RDD106-071905-2 V DD DECODER 1 OUT OF 6 SELECTOR BUFFER 7 OUTPUT