Texas Instruments CD74HCT390E Handleiding
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CD74HC390, CDx4HCT390 High-Speed CMOS Logic Dual Decade Ripple Counter
1 Features
•Two BCD decade or bi-quinary counters
•One package can be configured to divide-by-2, 4,
5, 10, 20, 25, 50, 100
•Two controller reset inputs to clear each decade
counter individually
•Fanout (over temperature range)
–Standard outputs: 10 LSTTL loads
–Bus driver outputs: 15 LSTTL loads
•Wide operating temperature range: -55°C to 125°C
•Balanced propagation delay and transition times
•Significant power reduction compared to LSTTL
logic ICs
•HC types
–2V to 6V operation
–High noise immunity: NIL = 30%, NIH = 30% of
VCC at VCC = 5V
•HCT types
–4.5 V to 5.5 V operation
–Direct LSTTL input logic compatibility, VIL = 0.8
V (max), VIH = 2 V (min)
–CMOS input compatibility, II ≤ 1 μA at VOL, VOH
2 Description
The SN74HC390 and ‘HCT390 devices include two
independent 4-bit decade ripple counters, falling-edge
clocked with asynchronous clear. Each counter is
divided into two sections, a divide-by-2 and divide-
by-5 counter, each of which has an independent clock
input. This allows for very flexible configuration of the
device.
Device Information
PART NUMBERPACKAGE(1) BODY SIZE (NOM)
CD54HCT390F3ACDIP (16)24.38 mm × 6.92 mm
CD74HC390MSOIC (16)9.90 mm × 3.90 mm
CD74HCT390MSOIC (16)9.90 mm × 3.90 mm
CD74HC390EPDIP (16)19.31 mm × 6.35 mm
CD74HCT390EPDIP (16)19.31 mm × 6.35 mm
(1)For all available packages, see the orderable addendum at
the end of the data sheet.
nCLKA
nCLR
2QA2QB2QC2QD
RR R
QQ
Q
Q
R
VCC = 16
GND = 8
nCLKB
Functional Block Diagram
CD74HC390, CD54HCT390, CD74HCT390
SCHS185E – SEPTEMBER 1997 – REVISED APRIL 2022
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
Product specificaties
| Merk: | Texas Instruments |
| Categorie: | Niet gecategoriseerd |
| Model: | CD74HCT390E |
| Breedte: | 19.69 mm |
| Diepte: | 6.6 mm |
| Hoogte: | 4.57 mm |
| Breedte verpakking: | 13.97 mm |
| Diepte verpakking: | 506 mm |
| Hoogte verpakking: | 11.23 mm |
| Soort: | Logic IC |
| Type verpakking: | PDIP |
| Aantal per verpakking: | 25 stuk(s) |
| Temperatuur bij opslag: | -65 - 150 °C |
| Bedrijfstemperatuur (T-T): | -55 - 125 °C |
| Aantal pinnen: | 16 |
| Breedte (met pennen): | 19.69 mm |
| Diepte (met pennen): | 10.92 mm |
| Hoogte (met pennen): | 8.26 mm |
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