SELECTABLE 4 DECADE CMOS DIVIDER
桃花心木课件FEATURES:
• Selectable Divide by 10 or 100 or 1,000 or 10,000 • 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 Noi Immunity • Ret
• All Inputs Protected
four walls• +4.5V to +15V Operation (V DD -V SS ) • Low Power Dissipaton
• RDD104 (DIP); RDD104-S (SOIC) - See Figure 1
DC ELECTRICAL CHARACTERISTICS:(All voltages referenced to Vss)
V DD -40°C +25°C +85°C UNIT
dieoutQuiescent Device Current 4.5V 10 10 300 uA Max 10V 20 20 600 uA Max
Output Voltage, Low Level 4.5V 0.01 0.01 0.05 V Min 10V 0.01 0.01 0.05 V Min High Level 4.5V 4.49 4.49 4.45 V Max 10V 9.99 9.99 9.95 V Max Input Noi Immunity 4.5V 1.3 1.3 1.3 V Min (Low and High) 10V 3.0 3.0 3.0 V Min Output Drive Current:
highway to hellN-Channel Sink Current 4.5V 2.3 1.9 1.6 mA Min (V OUT = Vss + 0.4V) 10V 5.0 4.0 3.5 mA Min P-Channel Source Current 4.5V 1.1 0.95 0.8 mA Min (V OUT = V DD - 1V) 10V 2.5 2.1 1.8 mA Min Input Capacitance (any input) 5.0 pF Max
DESCRIPTION OF OPERATION:
The RDD104 is a CMOS four decade
divider circuit that advances on each negative transition of the input clock pul. When the ret input is high the circuit is cleared to zero. The
clock input is applied to a three stage inverting
amplifier network who output is brought out so
that an external crystal network can be ud to
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form an oscillator circuit. If the clock output is not
ud,the amplifier acts as an input buffer. Two lect inputs are provided which enables the circuit to divide by 10, 100, 1,000 or 10,000.The Output Division is lected according to the following truth table:
DIVIDER SELECT INPUTS: OUTPUT SELECT 2 SELECT 1 DIVISION 0 0 10,000 0 1 1,000 1 0 100 1 1 10
MAXIMUM RATINGS:
PARAMETER SYMBOL VALUE UNIT
arenasStorage Temperature T STG -65 to +150 °C Operating Temperature T A -40 to +85 °C DC Supply Voltage (V DD - V SS ) +18 V Voltage at any input V IN V SS - 0.5 to V DD + 0.5 V January 2003
PIN ASSIGNMENT - TOP VIEW
12
3
4
56
78
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FIGURE 1V DD (+V)
OUTPUT
CLOCK OUTPUT
CLOCK INPUT
DIVIDER SELECT-1DIVIDER SELECT-2V SS (-V)
RESET
RDD 104
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 u.
RDD104-012703-1
LSI/CSI
LSI Computer Systems, Inc. 1235 Walt Whitman Road, Melville, NY 11747 (631) 271-0400 FAX (631) 271-0405
steampunkRDD 104
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RDD104-012703-2
