• Maximum Input Current of 1µA at 18V Over Full Pack-
age Temperature Range; 100nA at 18V and +25
• Noise Margin (Over Full Package/Temperature Range)
- 1V at VDD = 5V
- 2V at VDD = 10V
- 2.5V at VDD = 15V
• Standardized Symmetrical Output Characteristics
• 5V, 10V and 15V Parametric Ratings
• Meets All Requirements of JEDEC Tentative Standard
No. 13B, “Standard Specifications for Description of
‘B’ Series CMOS Devices”
o
C
Description
CD40102BMS and CD40103BMS consist of an 8-stage synchronous down counter with a single output which is active
when the internal count is zero. The CD40102BMS is configured as two cascaded 4-bit BCD counters, and the
CD40103BMS contains a single 8-bit binary counter. Each
type has control inputs for enabling or disabling the clock, for
clearing the counter to its maximum count, and for presetting
the counter either synchronously or asynchronously. All control inputs and the CARRY-OUT/ZERO-DETECT output are
active-low logic.
In normal operation, the counter is decremented by one
count on each positive transition of the CLOCK. Counting is
inhibited when the CARRY-IN/COUNTER ENABLE (
inputs is high. The CARRY-OUT/ZERO-DETECT (
output goes low when the count reaches zero if the
input is low, and remains low for one full clock period.
When the SYNCHRONOUS PRESET-ENABLE (
is low, data at the JAM input is clocked into the counter on
the next positive clock transition regardless of the state of
the
CI/CE input. When the ASYNCHRONOUS PRESET-
ENABLE (
APE) input is low, data at the JAM inputs is asynchronously forced into the counter regardless of the state of
the
SPE, CI/CE, or CLOCK inputs. JAM inputs J0-J7 represent two 4-bit BCD words for the CD40102BMS and a single
8-bit binary word for the CD40103BMS.
CI/CE)
CO/ZD)
CI/CE
SPE) input
Applications
• Divide-By- “N” Counters
• Programmable Times
• Interrupt Timers
• Cycle/Program Counter
Pinout
CD40102BMS, CD40130BMS
TOP VIEW
VSS
1
2
3
4
J0
5
J1
6
J2
7
J3
8
CLOCK
CLEAR
CARRY IN/
COUNTER ENABLE
16
VDD
SYNCHRONOUS
15
PRESET ENABLE
CARRY OUT/
14
ZERO DETECT
J7
13
J6
12
J5
11
J4
10
9
ASYNCHRONOUS
PRESET ENABLE
When the CLEAR (
chronously cleared to its maximum count (99
CD40102BMS and 255
CLR) input is low, the counter is asyn-
for the
for the CD40103BMS) regardless
10
10
of the state of any other input. The precedence relationship
between control inputs is indicated in the truth table.
If all control inputs except
CI/CE are high at the time of zero
count, the counters will jump to the maximum count, giving a
counting sequence of 100 or 256 clock pulses long.
This causes the
CO/ZD output to go low to enable the clock
on each succeeding clock pulse.
The CD40102BMS and CD40103BMS may be cascaded
using the
CI/CE input and the CO/ZD output, in either a syn-
chronous or ripple mode as shown in Figures 16 and 17.
The CD40102MS and CD40103BMS are supplied in these
16-lead outline packages:
Braze Seal DIP*H4W†H4X
Frit Seal DIP*H1L†H1F
Ceramic FlatpackH6W
*CD40102B Only†CD40130B Only