|
|
Número de pieza | HM514400BL | |
Descripción | 1/048/576-word X 4-bit Dynamic Random Access Memory | |
Fabricantes | Hitachi Semiconductor | |
Logotipo | ||
Hay una vista previa y un enlace de descarga de HM514400BL (archivo pdf) en la parte inferior de esta página. Total 27 Páginas | ||
No Preview Available ! ADE-203-269A (Z)
HM514400B/BL Series
HM514400C/CL Series
1,048,576-word × 4-bit Dynamic Random Access Memory
Rev. 1.0
Nov. 29, 1994
The Hitachi HM514400B/BL, HM514400C/CL
are CMOS dynamic RAM organized 1,048,576-
word × 4-bit. HM514400B/BL, HM514400C/CL
have realized higher density, higher performance
and various functions by employing 0.8 µm CMOS
process technology and some new CMOS circuit
design technologies. The HM514400B/BL,
HM514400C/CL offer Fast Page Mode as a high
speed access mode. Multiplexed address input
permits the HM514400B/BL, HM514400C/CL to
be packaged in standard 300-mil 26-pin plastic
SOJ, standard 400-mil 20-pin plastic ZIP and 26-
pin plastic TSOP II.
Features
• Single 5 V (±10%)
• High speed
— Access time
60 ns/70 ns/80 ns (max)
• Low power dissipation
— Active mode
605 mW/550 mW/495 mW (max)
— Standby mode 11 mW (max)
0.55 mW (max) (L-version)
• Fast page mode capability
• 1024 refresh cycles : 16 ms
1024 refresh cycles : 128 ms (L-version)
• 3 variations of refresh
— RAS-only refresh
— CAS-before-RAS refresh
— Hidden refresh
• Test function
• Battery back up operation
— HM514400BL Series (L-version)
— HM514400CL Series (L-version)
1 page Block Diagram
HM514400B/BL, HM514400C/CL Series
RAS
CAS
RAS Control
Circuit
CAS Control
Circuit
WE
WE Control
Circuit
OE
OE Control
Circuit
I/O1
I/O1 Buffer
I/O2
I/O2 Buffer
I/O3
I/O3 Buffer
I/O4
I/O4 Buffer
Row
Driver
Row Row
Driver Driver
Row
Driver
Row
Driver
Row Row
Driver Driver
Row
Driver
Row Decoder & Peripheral Circuit
Row
Driver
Row Row
Driver Driver
Row
Driver
Row
Driver
Row Row
Driver Driver
Row
Driver
Row Address Buffer
Column Address Buffer
Address A0–A9
5
5 Page Read-Modify-Write Cycle
Parameter
Read-modify-write cycle time
RAS to WE delay time
CAS to WE delay time
Column address to WE delay time
OE hold time from WE
HM514400B/BL, HM514400C/CL Series
HM514400B/BL, HM514400C/CL
-6 -7 -8
Symbol Min Max Min Max Min Max Unit Notes
tRWC
tRWD
tCWD
tAWD
tOEH
150 — 180 — 200 — ns
80 — 95 — 105 — ns 10
35 — 45 — 45 — ns 10
50 — 60 — 65 — ns 10
15 — 20 — 20 — ns
Refresh Cycle
HM514400B/BL, HM514400C/CL
-6 -7 -8
Parameter
CAS setup time (CBR refresh cycle)
CAS hold time (CBR refresh cycle)
RAS precharge to CAS hold time
CAS precharge time in normal mode
Symbol
tCSR
tCHR
tRPC
tCPN
Min
10
10
10
10
Max Min
— 10
— 10
— 10
— 10
Max Min
— 10
— 10
— 10
— 10
Max Unit Notes
— ns
— ns
— ns
— ns
Fast Page Mode Cycle
HM514400B/BL, HM514400C/CL
-6 -7 -8
Parameter
Symbol Min Max Min Max Min Max Unit Notes
Fast page mode cycle time
tPC 40 — 45 — 50 — ns
Fast page mode CAS precharge time tCP
10 — 10 — 10 — ns
Fast page mode RAS pulse width
tRASC — 100000 — 100000 — 100000 ns 12
Access time from CAS precharge
tACP
— 35 — 40 — 45 ns 3, 13,
17
RAS hold time from CAS precharge tRHCP 35 — 40 — 45 — ns
11
11 Page |
Páginas | Total 27 Páginas | |
PDF Descargar | [ Datasheet HM514400BL.PDF ] |
Número de pieza | Descripción | Fabricantes |
HM514400B | 1/048/576-word X 4-bit Dynamic Random Access Memory | Hitachi Semiconductor |
HM514400BL | 1/048/576-word X 4-bit Dynamic Random Access Memory | 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 |