Texas Instruments

Description

The SN54/ 74LS90 , SN54/74LS92 and SN54/74LS93 are high-speed 4-bit ripple type counters partitioned into two sections. Each counter has a divide-by-two Rev. D. Document Feedback. Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Jan 7, 2004 The ICM7216B is a fully integrated Timer Counters with LED display drivers. They combine a high frequency oscillator, a decade timebase INFORMATION. FIGURE TITLE. FIGURE NO. PAGE. REFERENCE/SOURCE. . +. NC. 5V. 3MHZ. OSC. OUT. CLK. N/C. 74LS90 . 0.1 F. 0.1 F. 4.7 F. 0.1 F. 74LS90 . Decade counter. $1.66. IC420. 74LS02. Quad 2-input NOR gates. $0.70 . IC421. 74LS27. Triple 3-input NOR gate. $0.53. IC422. 74LS30. 8-input NAND