|
|
PDF HD74HC670 Data sheet ( Hoja de datos )
| Número de pieza | HD74HC670 | |
| Descripción | 4-by-4 Register File (with 3-state outputs) | |
| Fabricantes | Hitachi Semiconductor | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de HD74HC670 (archivo pdf) en la parte inferior de esta página. Total 10 Páginas | ||
|
No Preview Available !
HD74HC670
4-by-4 Register File (with 3-state outputs)
Description
The HD74HC670, 16-bit register file is organized as 4 words of 4 bits each and separate on-chip decoding
is provided for addressing the four word locations to either write-in or retrieve data.
This permits simultaneous writing into one location and reading from another word location. Four data
inputs are available which are used to supply the 4-bit word to be stored. Location of the word is
determined by the write-address inputs A and B in conjunction with a write-enable signal. Data applied at
the inputs should be in its true form. That is, if a high-level signal is desired from the output, a high-level is
applied at the data input for that particular bit location. The latch inputs are arranged so that new data will
be accepted only if both internal address gate inputs are high. When this condition exists, data at the D
input is transferred to the latch output. When the write-enable input, (GW) is high, the data inputs are
inhibited and their levels can cuase no change in the information stored in the internal latches. When the
read-enable input, (GR) is high, the data outputs are inhibited and go into the high-impedance state. The
individual address lines permit direct acquisition of data stored in any four of the latches. Four individual
decoding gates are used to complete the address for reading a word. when the read address is made in
conjunction with the read-enable signal, the word appears at the four outputs.
Features
• High Speed Operation: tpd (Read Select to Q) = 21 ns typ (CL = 50 pF)
• High Output Current: Fanout of 15 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)
1 page  
HD74HC670
AC Characteristics (CL = 50 pF, Input tr = tf = 6 ns)
Ta = 25°C
Ta = –40 to
+85°C
Item
Symbol
Propagation delay tPLH
time
t PHL
VCC (V)
2.0
4.5
6.0
Min Typ Max Min
— — 160 —
— 21 32 —
— — 27 —
Max Unit
200 ns
40
34
tPLH 2.0 — — 200 — 250 ns
tPHL 4.5 — 24 40 — 50
6.0 — — 34 — 43
tPLH 2.0 — — 150 — 190 ns
tPHL 4.5 — 18 30 — 38
6.0 — — 26 — 33
Output enable
time
t ZH
t ZL
2.0 — — 150 — 190 ns
4.5 — 18 30 — 38
6.0 — — 26 — 33
Output disable
time
t HZ
t LZ
2.0 — — 150 — 190 ns
4.5 — 17 30 — 38
6.0 — — 26 — 33
Pulse width tw 2.0 80 — — 100 — ns
4.5 16 — — 20 —
6.0 14 — — 17 —
Setup time
tsu 2.0 60 — — 75 — ns
4.5 12 4 — 15 —
6.0 10 — — 13 —
tsu 2.0 60 — — 75 — ns
4.5 12 — — 15 —
6.0 10 — — 13 —
Hold time
th 2.0 50 — — 63 — ns
4.5 10 6 — 13 —
6.0 9 — — 11 —
2.0 50 — — 63 — ns
4.5 10 — — 13 —
6.0 9 — — 11 —
Test Conditions
Read select to Q
Write enable to Q
Data to Q
Data to Write enable
Write select to Write enable
Write enable to Data
Write enable to Write select
5
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet HD74HC670.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| HD74HC670 | 4-by-4 Register File (with 3-state outputs) | Hitachi Semiconductor |
| HD74HC673 | 16-bit Shift Register | Hitachi Semiconductor |
| HD74HC674 | 16-bit Shift Register | Hitachi Semiconductor |
| HD74HC677 | 16-bit Address Comparator | Hitachi Semiconductor |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |