Features:

1. Two Independent J-K Flip-Flops
2. Positive Edge Triggered Flip-Flop
3. Operating Temperature to 70°C
4. Standard TTL Switching Voltages
5. Superseded, Not Recommended for New Designs

Specifications :

• TTL ICs i.e. Transistor Transistor Logic ICs.
• Total pins = 16 pins.
• Dual 4:1 line multiplexer circuit in single package.
• Supply voltage = 5V DC ±0.25V.
• Operating temperature range = 0°C to +70°C.
• High fan-out = 10.
• Low impedance < 100Ω
• Totem pole outputs.

Features :

• Counts binary
• Single down/up count control line
• Count enable control input
• Ripple clock output for cascading
• Asynchronously presettable with load control
•  Parallel outputs
• Cascadable for n-bit applications
• Average propagation delay 20 ns
• Typical clock frequency 25 MHz
• Typical power dissipation 100 mW

Features:- 

• Two Independent Negative Edge Triggered JK Flip-Flops
• Clear Input Resets the Output
•  Fast Switching Times
•  Operating Temperature up to 70°C
•  Standard TTL Switching Voltages

Features:- 

• Serial or parallel expansion without extra gating
•  Magnitude comparison of any binary words
•  Output capability: standard
• ICC category: MSI

Specification:

• Product type: Binary Decade Counter IC
• IC number: 7490
• Technology: CMOS
• Logic family: 74 series
• Number of pins: 14
• Pin type: through hole
• Package: PDIP-14 tube type
• Package contains: 1 x 7490 IC