74HC40105DB(2016) データシートの表示（PDF） - NXP Semiconductors.
部品番号
コンポーネント説明
メーカー
74HC40105DB Datasheet PDF : 36 Pages
| |||
Nexperia
74HC40105; 74HCT40105
4-bit x 16-word FIFO register
6.6 Expanded format
With the addition of a logic gate, the FIFO is easily expanded to increase word length (see
Figure 19). The basic operation and timing are identical to a single FIFO, except for an
additional gate delay on the flag outputs. If during application, the following occurs:
• SI is held HIGH when the FIFO is empty, some additional logic is required to produce
a composite DIR pulse (see Figure 9 and Figure 20).
Due to the part-to-part spread of the ripple through time, the SI signals of FIFOA and
FIFOB do not always coincide. As a result, the AND-gate does not produce a composite
flag signal. The solution is given in Figure 20. The “40105” is easily cascaded to increase
the word capacity and no external components are needed. In the cascaded
configuration, the FIFOs perform all necessary communications and timing. The minimum
flag pulse widths and the flag delays determine the intercommunication speed. The data
rate of cascaded devices is typically 25 MHz. Word-capacity can be expanded to and
beyond 32-words x 4-bits (see Figure 21).
7. Limiting values
Table 3. Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V).
Symbol
Parameter
Conditions
Min Max Unit
VCC
supply voltage
IIK
input clamping current
VI < 0.5 V or VI > VCC + 0.5 V
IOK
output clamping current VO < 0.5 V or VO > VCC + 0.5 V
IO
output current
VO = 0.5 V to (VCC + 0.5 V)
0.5
[1]
-
[1]
-
-
+7 V
20 mA
20 mA
25 mA
ICC
IGND
Tstg
Ptot
supply current
ground current
storage temperature
total power dissipation
SO16 package
(T)SSOP16 package
-
50
65
[2]
-
[3]
-
+50 mA
- mA
+150 C
500 mW
500 mW
[1] The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
[2] For SO16 packages: above 70 C the value of Ptot derates linearly with 8 mW/K.
[3] For SSOP16 and TSSOP16 packages: above 60 C the value of Ptot derates linearly with 5.5 mW/K.
74HC_HCT40105
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 4 — 29 January 2016
.
7 of 36
© Nexperia B.V. 2017. All rights reserved
Share Link: 