74HC90-7490

74HC90-7490 is a high-quality electronic component designed for Arduino, prototyping, and educational electronics.

high-speed 4-bit ripple type counters partitioned into two sections. Each counter has a divide-by-two section and either a divide-by-five  section which are triggered by a HIGH-to-LOW transition on the clock inputs. Each section can be used separately or tied together (Q to CP) to form BCD, bi-quinary, modulo-12, or modulo-16 counters. All of the counters have a 2-input gated Master Reset (Clear), and the LS90 also has a 2-input gated Master Set (Preset 9)

BCD Decade (8421) Counter — The CP1 input must be externally connected to the Q0 output.

The CP0 input receives the incoming count and a BCD count sequence is  produced.

Symmetrical Bi-quinary Divide-By-Ten Counter — The Q3 output must be externally connected to the CP0 input. The input count is then applied to the CP1 input and a divide-by-ten square wave is obtained at output Q0

Specifications

No. of Pins: 14
Operating Temperature Range :0°C to +70°C
Supply Voltage Range: 4.75 V to 5.25V
Package: DIP-14

Symbol
pin
Description

CP0
1
Clock (Active LOW going edge) Input to
÷2 Section

CP1
14
Clock (Active LOW going edge) Input to
÷5 Section

MR1,MR2
2,3
Master Reset (Clear) Inputs

MS1,MS2
6,7
Master Set (Preset-9, LS90) Inputs

Q0
12
Output from ÷2 Section

Q1,Q2,Q3
9,8,11
Outputs from ÷5 sections

NC
4, 13
data inputs source 2

VCC
5
supply voltage

Notes

– The Output LOW drive factor is 2.5 U.L. for Military, (54) and 5 U.L. for commercial (74)
Temperature Ranges.
– The Q0 Outputs are guaranteed to drive the full fan-out plus the CP1 input of the device-

-1 TTL Unit Load (U.L.) = 40 μA HIGH/1.6 mA LOW.

-To insure proper operation the rise (tr) and fall time (tf) of the clock must be less than 100 ns.

For 74HC90 Datasheet Click Here

It’s perfect for DIY makers, students, and anyone building custom electronic circuits or STEM kits.