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PDF HD74HC393 Data sheet ( Hoja de datos )
| Número de pieza | HD74HC393 | |
| Descripción | Dual 4-bit Binary Counters | |
| Fabricantes | Renesas | |
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HD74HC393
Dual 4-bit Binary Counters
REJ03D0625-0200
(Previous ADE-205-504)
Rev.2.00
Mar 30, 2006
Description
The HD74HC393 contain two 4-bit ripple carry binary counters, which can be cascaded to create a single divide-by-256
counter.
The HD74HC393 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
truncation and allows the implementation of divide-by-N counter configurations.
Features
• High Speed Operation: tpd (A to QA) = 16 ns typ (CL = 50 pF)
• High Output Current: Fanout of 10 LSTTL Loads
• Wide Operating Voltage: VCC = 2 to 6 V
• Low Input Current: 1 µA max
• Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C)
• Ordering Information
Part Name
Package Type
Package Code
(Previous Code)
Package
Abbreviation
HD74HC393P
DILP-14 pin
PRDP0014AB-B
(DP-14AV)
P
HD74HC393FPEL SOP-14 pin (JEITA)
PRSP0014DF-B
(FP-14DAV)
FP
Note: Please consult the sales office for the above package availability.
Taping Abbreviation
(Quantity)
—
EL (2,000 pcs/reel)
Function Table
Clock
X
H
L
Note: 1. H; High level, L; Low level, X; Irrelevant
Clear
H
L
L
L
L
Outputs
L
No change
No change
No change
Advance to next state
Rev.2.00 Mar 30, 2006 page 1 of 6
1 page  
HD74HC393
Waveforms
• Waveform – 1
tr tf
Clock
QA
QB
QC
QD
50%
50% 50%
50%
tw tw
tPHL (Measure at tn+2)
tPLH (Measure at tn+1)
90%
50%
10%
90%
50%
10%
tTHL
tTLH
tPHL (Measure at tn+4)
tPLH (Measure at tn+2)
90%
50%
10%
90%
50%
10%
tTHL
tPHL (Measure at tn+8)
90%
50%
10%
tTLH
tPLH (Measure at tn+4)
90%
50%
10%
tTHL
tTLH
tPHL (Measure at tn+16)
tPLH (Measure at tn+8)
90%
50%
10%
50%
10%
90%
tTHL
tTLH
Notes: 1. Input waveform: PRR ≤ 1 MHz, Zo = 50 Ω, tr ≤ 6 ns, tf ≤ 6 ns
2. tn is bit time with all outputs at low.
VCC
0V
VOH
VOL
VOH
VOL
VOH
VOL
VOH
VOL
• Waveform – 2
Clear
QA to QD
tr tf
10 %
90 %
50 % 50 %
tw(clear)
tPHL
10 %
90%
50 %
10%
tTHL
VCC
0V
VOH
VOL
Notes: 1. Input waveform: PRR ≤ 1 MHz, Zo = 50 Ω, tr ≤ 6 ns, tf ≤ 6 ns
2. The output are measured one at a time with one transition per measurement.
Rev.2.00 Mar 30, 2006 page 5 of 6
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet HD74HC393.PDF ] | |
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