CD4527BMS
CMOS BCD Rate Multiplier
December 1992
Features
Description
• High Voltage Type (20V Rating)
• Cascadable in Multiples of 4-Bits
• Set to “9” Input and “9” Detect Output
• 100% Tested for Quiescent Current at 20V
• 5V, 10V and 15V Parametric Ratings
CD4527BMS is a low power 4-bit digital rate multiplier that
provides an output pulse rate which is the clock input pulse
rate multiplied by 1/10 times the BCD input. For example,
when the BCD input is 8, there will be 8 output pulses for
every 10 input pulses. This device may be used to perform
arithmetic operations (add, subtract, divide, raise to a
power), solve algebraic and differential equations, generate
natural logarithms and trigonometric functions, A/D and D/A
conversion, and frequency division.
• Maximum Input Current of 1µA at 18V Over Full Pack-
age Temperature Range; 100nA at 18V and +25oC
For fractional multipliers with more than one digit,
CD4527BMS devices may be cascaded in two different
modes: the Add mode and the Multiply mode (see Figures 9
and 11). In the Add mode,
• Noise Margin (Over Full Package/Temperature Range)
- 1V at VDD = 5V
- 2V at VDD = 10V
- 2.5V at VDD = 15V
Output Rate =
(Clock Rate) [0.1BCD1 + 0.01BCD2 + 0.001BCD3 + . . .]
• Standardized Symmetrical Output Characteristics
• Meets All Requirements of JEDEC Tentative Standard
No. 13B, “Standard Specifications for Description of
‘B’ Series CMOS Devices”
In the Multiply mode, the fraction programmed into the first
rate multiplier is multiplied by the fraction programmed into
the second one,
9
4
36
e.g.
x
=
or 36 output
Applications
10
10
100
• Numerical Control
• Instrumentation
• Digital Filtering
pulses for every 100 clock input pulses.
The CD4527BMS is supplied in these 16-lead outline packages:
Braze Seal DIP
Frit Seal DIP
H4X
H1F
H6W
• Frequency Synthesis
Ceramic Flatpack
Pinout
Functional Diagram
CD4527BMS
TOP VIEW
BCD RATE
SELECT INPUTS
STROBE
A
14 15
B
C
2
D
3
10
“9” OUT
1
2
3
4
5
6
7
8
16 VDD
CLOCK
11
CASCADE
9
12
C
15 B
INHIBIT
D
14 A
(CARRY) IN
OUT
OUT
RATE
SELECT
LOGIC
6
5
4
SET TO “9”
13 CLEAR
12 CASCADE
11 INHIBIT IN (CARRY)
10 STROBE
RATE
OUTPUTS
SET TO
NINE
÷10
COUNTER
OUT
13
CLEAR
OUT
INHIBIT OUT (CARRY)
VSS
“9” OUT
1
9
CLOCK
7
INHIBIT
(CARRY) OUT
VSS = 8
VDD = 16
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
File Number 3343
1-888-INTERSIL or 321-724-7143 | Copyright © Intersil Corporation 1999
7-1216