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Vanguard International Semiconductor |
VIS
Description
Preliminary
VG3664321(4)1(2)BT
CMOS Synchronous Dynamic RAM
The device is CMOS Synchronous Dynamic RAM organized as 524,288 - word x 32 - bit x 4 -
bank, and 1,048,576 - word x 32 - bit x 2 - bank, respectively. lt is fabricated with an advanced
submicron CMOS technology and designed to operate from a singly 3.3V only power supply. It is
packaged in JEDEC standard pinout and standard plastic TSOP package.
Features
• Single 3.3V (±0.3V ) power supply
• High speed clock cycle time : 8/10 for LVTTL
• High speed clock cycle time : 8/10 for SSTL - 3
• Fully synchronous with all signals referenced to a positive clock edge
• Programmable CAS Iatency (2,3)
• Programmable burst length (1,2,4,8,& Full page)
• Programmable wrap sequence (Sequential/Interleave)
• Automatic precharge and controlled precharge
• Auto refresh and self refresh modes
• Dual Internal banks controlled by A11 (Bank select) for VG36643211(2)
• Quad Internal banks controlled by A11 & A12 (Bank select) for VG36643241(2)
• Each Banks can operate simultaneously and independently
• LVTTL compatible I/O interface for VG36643211 and VG36643241
• SSTL - 3 compatible I/O interface for VG36643212 and VG36643242
• Random column access in every cycle
• x32 organization
• Input/Output controlled by DQM0 ~ 3
• 4,096 refresh cycles/64ms
• Burst termination by burst stop and precharge command
• Burst read/single write option
Document : 1G5-0099
Rev.1
Page 1
VIS
Pin Configuration
Preliminary
VG3664321(4)1(2)BT
CMOS Synchronous Dynamic RAM
VDD
DQ0
VDDQ
DQ1
DQ2
VSSQ
DQ3
DQ4
VDDQ
DQ5
DQ6
VSSQ
DQ7
NC
VDD
DQM0
WE
CAS
RAS
CS
NC
A11/BA
NC
A10/AP
A0
A1
A2
DQM2
VDD
NC
DQ16
VSSQ
DQ17
DQ18
VDDQ
DQ19
DQ20
VSSQ
DQ21
DQ22
VDDQ
DQ23
VDD
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
86 VSS
85 DQ15
84 VSSQ
83 DQ14
82 DQ13
81 VDDQ
80 DQ12
79 DQ11
78 VSSQ
77 DQ10
76 DQ9
75 VDDQ
74 DQ8
73 NC
72 VSS
71 DQM1
70 NC (VREF)
69 NC
68 CLK
67 CKE
66 A9
65 A8
64 A7
63 A6
62 A5
61 A4
60 A3
59 DQM3
58 VSS
57 NC
56 DQ31
55 VDDQ
54 DQ30
53 DQ29
52 VSSQ
51 DQ28
50 DQ27
49 VDDQ
48 DQ26
47 DQ25
46 VSSQ
45 DQ24
44 VSS
Pin Description
VG36643211 (2)
Pin Name
Function
A0 - A11
Address inputs
- Row address A0 - A10
- Column address A0 - A8
A11 : Bank select
DQ0 ~ DQ31 Data - in/data - out
RAS
Row address strobe
CAS
Column address strobe
WE Write enable
VSS Ground
VDD Power ( + 3.3V)
Pin Name
Function
DQM0 ~ 3 DQ Mask enable
CLK
CKE
CS
VDDQ
VSSQ
(VREF)
Clock input
Clock enable
Chip select
Supply voltage for DQ
Ground for DQ
Reference Voltage, SSTL - 3 only
Document : 1G5-0099
Rev.1
Page 2
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