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PDF MSM6791 Data sheet ( Hoja de datos )
| Número de pieza | MSM6791 | |
| Descripción | DRAM Interface IC | |
| Fabricantes | OKI electronic componets | |
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¡MSM6791 Semiconductor
MSM6791
DRAM Interface IC
¡ Semiconductor
GENERAL DESCRIPTION
The MSM6791 can be used as a memory for voice data by connecting OKI solid-state recording
and playback ICs (MSM6688 and MSM6788).
FEATURES
• DRAM (¥ 1-bit configuration)
1M-bit DRAM (MSM511000A, MSM511001A) : 8 pcs. can be connected.
4M-bit DRAM (MSM514100A, MSM514101A) : 8 pcs. can be connected.
16M-bit DRAM (MSM5116100A)
: 2 pcs. can be connected.
Note: MSM511002A/MSM514102A that corresponds to a static column mode cannot be used.
• Power supply voltage :
5V single rail
• Built-in refresh circuit (RAS only refresh)
• Original oscillation frequency:
8MHz
• Bit rates:
10kbps, 12.5kbps, 16kbps in MSM6788
connection (8kHz sampling fixation)
7.5kbps, 9.4kbps, 12kbps in MSM6788
connection (6kHz sampling fixation)
16kbps~32kbps in MSM6688 connection
(4kHz~8kHz sampling)
• Package:
44-pin plastic QFP (QFP44-P-910-2K) (Product name : MSM6791GS-2K)
1 page  
MSM6791
ABSOLUTE MAXIMUM RATINGS
Parameter
Supply Voltage
Input Voltage
Output Voltage
Input Current
Output Current
Storage Temperature
Symbol
VDD
VI
VO
II
IO
TSTG
Condition
Ta = 25˚C
GND = 0V
—
¡ Semiconductor
Rating
–0.5 to +7
–0.5 to VDD+0.5
–0.5 to VDD+0.5
–10 to +10
–20 to +20
–65 to +150
Unit
V
V
V
mA
mA
˚C
RECOMMENDED OPERATING CONDITIONS
Parameter
Supply Voltage
Operating Temperature
Oscillation Frequency
Symbol
VDD
TOP
fOSC
Range
4.5 to 5.5
–40 to +85
8
GND = 0V
Unit
V
˚C
MHz
ELECTRICAL CHARACTERISTICS
DC Characteristics
Parameter
"H" Level Input Voltage
"L" Level Input Voltage
"H" Level Input Current
"L" Level Input Current
3-state Output Leak Current
(includes open-drain output)
H" Level Output Voltage
"L" Level Output Voltage
Operational
Current Consumption
Symbol
VIH
VIL
IIH
IIL
IOZH
IOZL
VOH
VOL
IDD
(Ta = –40 to +85˚C, VDD = 5V±10% GND = 0V)
Condition
Min. Typ. *1 Max. Unit
—
3.5
—
VDD+0.3
V
—
–0.3 —
1.5 V
VIH = VDD
— 0.01
10 mA
VIL = GND
–10 –0.01 — mA
VOH = VDD
— 0.01
10 mA
VOL = GND
–10 –0.01 — mA
IOH = –5.0 mA
2.4 4.20 VDD V
IOL = 5.0 mA
VSS 0.24 0.5 V
Output open fOSC = 8MHz
VIH = VDD
——
3 mA
VIL = GND
*1 TYP means VDD=5.0V, Ta=25°C
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet MSM6791.PDF ] | |
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