Description
/100 seconds to years. The counters are controlled by a pulse train divided down from a crystal oscillator circuit, and the frequency of the crystal is selectable 3 Description. Supports 1-MHz Fast Mode Plus I2C Bus. The TCA8418E is a keypad scan device with integrated ESD protection. It can operate from 1.65 V. Features. 16 Key Pushbutton Pad in 4 x 4 Matrix. Four Digit Multiplexed LED Display with Flashing Colon. Industrial Real Time Clock/Timer. Controls to control the decoded address lines and a 74LS139 decoder driven from the least significant address bits provides the active-low CS1 through CS4 signals. by a 74LS139 dual 1-of-4 demultiplexer. The state of inputs. 1A and 1B determines which channel is selected, and the state of inputs 2A and 2B determines
Part Number | 74LS139 |
Brand | Renesas |
Image |
74LS139
RENRSAS
108
1.46
Gentle Electronic (HK) Limited
74LS139
rene
100
2.65
Sino Star Electronics (HK) Co.,Limited
74LS139
ren
13352
3.84
Yingxinyuan INT'L (Group) Limited
74LS139
RENESA
20680
5.03
ZHONGGANG TECHNOLOGY (HK) INDUSTRY LIMITED
74LS139
RENESAS/NEC
8385
6.22
Dedicate Electronics (HK) Limited