RDD106 Datasheet, PDF (1/2 Pages) LSI Computer Systems – SELECTABLE 6 DECADE CMOS DIVIDER

LSI/CSI
RDD106
U_{® L}
LSI Computer Systems, Inc. 1235 Walt Whitman Road, Melville, NY 11747 [phone] FAX [phone]
A3800
SELECTABLE 6 DECADE CMOS DIVIDER
August 2007
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 -
PIN ASSIGNMENT - TOP VIEW
DIVIDER
1
SELECT-1
DIVIDER
2
SELECT-2
V SS (-V ) 3
8 _{V DD (+V )}
7 OUTPUT
6 _{CLOCK OUTPUT}
RESET ⁴
5 _{CLOCK INPUT}
FIGURE 1
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.
The Output Division is selected according to the
following truth table:
DIVIDER SELECT INPUTS:
OUTPUT
SELECT 2 SELECT 1 DIVISION
*1
*F
1,000,000
*0
*F
100,000
0
0
10,000
0
1
1,000
1
0
100
1
1
10
*Note: Not valid below 4.5V. F = Floating
MAXIMUM RATINGS:
PARAMETER
Storage Temperature
Operating Temperature
DC Supply Voltage
Voltage at any input
SYMBOL
VALUE
UNIT
TSTG
-65 to +150
°C
TA
-40 to +85
°C
(VDD - VSS)
+18
V
VIN VSS - 0.3 to VDD + 0.3 V
DC ELECTRICAL CHARACTERISTICS:
(All voltages referenced to VSS )
Quiescent Current
(Pin 1 = VDD)
VDD
4.5V
10V
-40°C +25°C +85°C
2.0
1.5 1.0
3.0
2.5 2.0
Quiescent Current
4.5V
(Pin 1 = F)
10V
Quiescent Current
(Pin 1 = VSS)
4.5V
10V
Output Voltage, Low Level 4.5V
10V
High Level 4.5V
10V
Pin1 Sink / Source Current 4.5V
(Pin 1 = VSS / VDD)
10V
Input Noise Immunity
(Low and High)
4.5V
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
UNIT
uA Max
uA Max
uA Max
uA Max
uA Max
uA Max
V Min
V Min
V Max
V Max
uA Max
uA Max
V Min
V Min
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.
Output Drive Current:
N-Channel Sink Current 4.5V 2.5
(VOUT = VSS + 0.4V)
10V 7.0
P-Channel Source Current 4.5V 3.0
(VOUT = VDD - 1V)
10V 7.7
Input Capacitance (any input)
-
2.0 1.5
5.5 4.0
mA Min
mA Min
2.5 1.8 mA Min
6.0 4.5 mA Min
5.0
- pF Max
RDD106-081007-1