The 74LS189 is a high speed 64-bit RAM organized as a 16- word by 4-bit array. Address inputs are buffered to minimize loading and are fully decoded on-chip. The outputs are 3-state and are in the high impedance state whenever the Chip Select (CS) input is HIGH. The outputs are active only in the Read mode and the output data is the complement of the stored data.
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The 74LS189 is a high speed 64-bit RAM organized as a 16- word by 4-bit array. Address inputs are buffered to minimize loading and are fully decoded on-chip. The outputs are 3-state and are in the high impedance state whenever the Chip Select (CS) input is HIGH. The outputs are active only in the Read mode and the output data is the complement of the stored data.
Features:-
? 3-State Outputs For Data
Bus Applications
? Buffered Inputs
Minimize Loading
? Address
Decoding On-Chip
?
Diode Clamped Inputs Minimize Ringing
| Symbol | Parameter | Min | Max | Units | Conditions | |
| VOL | Output Low Voltage | XM | 0.4 | 0.5 | V | VCC= Min |
| lOL = 16 mA (S189) | ||||||
| XC | lOL = 16 mA (74LS189) | |||||
| VOH | Output High Voltage | XM | 2.8 | 2.8 | V | VCC= Min |
| lOL = 0.4 mA (LS189) | ||||||
| XC | lOL = 6.5 mA (74LS189) | |||||
| IOS | Output Short Circuit Current | -80 | mA | Vcc = Max | ||
| ICC | Power Supply Current | 40 | mA | Vcc = Max; WE, CS, Gnd | ||
Operating voltage | 2.5 3.0V |
Pixel Resolution | 0.3MP |
Photosensitive array | 640 x 480 |
Optical Size | 1.6 inch |
Angel of view | 67 degrees |
Maximum Frame Rate | 30fps VGA |
Sensitivity | 1.3V/(Lux-sec) |
Dormancy | Less than 20A |
Power consumption | 60mW/15fpsVGA YUV |
Temperature operation Range | -30 C ~ 70 C |
Pixel area | 3.6 x 3.6 m |
Signal to noise ratio (SNR) | 46 dB |
Dynamic range | 52 dB |
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