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PDF HD74LV393A Data sheet ( Hoja de datos )
| Número de pieza | HD74LV393A | |
| Descripción | Dual 4-bit Binary Counters | |
| Fabricantes | Hitachi Semiconductor | |
| Logotipo |  |
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HD74LV393A
Dual 4-bit Binary Counters
ADE-205-276 (Z)
1st Edition
April 1999
Description
The HD74LV393A contain two 4-bit ripple carry binary counters, which can be cascaded to create a single
divide-by-256 counter.
The HD74LV393A is incremented on the high to low transition (negative edge) of the clock input, and
each has an independent clear input. When clear is set high all four bits of each counter are set to a low
level. This enables count trucation and allows the implementation of divide-by-N counter configurations.
Low-voltage and high-speed operation is suitable for the battery-powered products (e.g., notebook
computers), and the low-power consumption extends the battery life.
Features
• VCC = 2.0 V to 5.5 V operation
• All inputs VIH (Max.) = 5.5 V (@VCC = 0 V to 5.5 V)
• All outputs VO (Max.) = 5.5 V (@VCC = 0 V)
• Typical VOL ground bounce < 0.8 V (@VCC = 3.3 V, Ta = 25°C)
• Typical VOH undershoot > 2.3 V (@VCC = 3.3 V, Ta = 25°C)
• Output current ±6 mA (@VCC = 3.0 V to 3.6 V), ±12 mA (@VCC = 4.5 V to 5.5 V)
1 page  
Timing Diagram
CLK
CLR
QA
QB
QC
QD
HD74LV393A
5
5 Page 
HD74LV393A
• Waveforms – 1
tr
tf
CLR
10 %
90 %
50 % VCC
tw
10 %
tf
tr
CLK
90 %
50 % VCC
tsu
10 %
tw
tPLH
90 %
50 % VCC
tw
tPHL
Q n 50 % VCC 50 % VCC
• Waveforms – 2
tr
CLR
10 %
90 %
50 % VCC
VCC
0V
tf
CLK
90 %
50 % VCC
10 %
tPHL
tPHL
Q n 50 % VCC
tPLH
VOH
Qn
50 % VCC
Qn
50 % VCC
VOL
VCC
0V
VCC
0V
VOH
VOL
VCC
0V
VOH
VOL
VOH
VOL
Notes:1. Input waveform: PRR ≤ 10 MHz, Zo = 50 Ω, t r ≤ 3 ns, t f ≤ 3 ns
2. The output are measured one at a time with one transition per measurement.
11
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet HD74LV393A.PDF ] | |
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