!
K4S280432B |
CMOS SDRAM |
128Mbit SDRAM
8M x 4Bit x 4 Banks
Synchronous DRAM
LVTTL
Revision 0.0
Aug. 1999
* Samsung Electronics reserves the right to change products or specification without notice.
Rev. 0.0 Aug. 1999
K4S280432B |
|
|
|
|
CMOS SDRAM |
|||||||||||||||||
8M x 4Bit x 4 Banks Synchronous DRAM |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||||||||
FEATURES |
GENERAL DESCRIPTION |
|
|
|
|
|
|
|
|
|||||||||||||
• |
JEDEC standard 3.3V power supply |
The K4S280432B is 134,217,728 bits synchronous high data |
||||||||||||||||||||
• |
LVTTL compatible with multiplexed address |
rate Dynamic RAM organized as 4 x 8,388,608 words by 4 bits, |
||||||||||||||||||||
• |
Four banks operation |
fabricated with SAMSUNG′s high performance CMOS technol- |
||||||||||||||||||||
• MRS cycle with address key programs |
ogy. Synchronous design allows precise cycle control with the |
|||||||||||||||||||||
|
-. CAS latency (2 & 3) |
use of system clock I/O transactions are possible on every clock |
||||||||||||||||||||
|
-. Burst length (1, 2, 4 & 8 Page ) |
cycle. Range of operating frequencies, programmable burst |
||||||||||||||||||||
|
-. Burst type (Sequential & Interleave) |
length and programmable latencies allow the same device to be |
||||||||||||||||||||
• All inputs are sampled at the positive going edge of the system |
useful for a variety of high bandwidth, high performance mem- |
|||||||||||||||||||||
|
clock. |
ory system applications. |
|
|
|
|
|
|
|
|
|
|
|
|
||||||||
• |
Burst read single-bit write operation |
ORDERING INFORMATION |
|
|
|
|
|
|
|
|
||||||||||||
• |
DQM for masking |
|
|
|
|
|
|
|
|
|||||||||||||
• |
Auto & self refresh |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|||||||
Part No. |
Max Freq. |
Interface |
Package |
|||||||||||||||||||
• |
64ms refresh period (4K Cycle) |
|||||||||||||||||||||
K4S280432B-TC/L75 |
133MHz(CL=3) |
|
|
|
|
|
|
|
|
|||||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|||||||
|
|
|
|
|
|
|
|
K4S280432B-TC/L80 |
125MHz(CL=3) |
|
|
|
|
|
|
|
54 |
|||||
|
|
|
|
|
|
|
|
K4S280432B-TC/L1H |
100MHz(CL=2) |
|
LVTTL |
|
||||||||||
|
|
|
|
|
|
|
|
|
|
TSOP(II) |
||||||||||||
|
|
|
|
|
|
|
|
K4S280432B-TC/L1L |
100MHz(CL=3) |
|
|
|
|
|
|
|
|
|||||
FUNCTIONAL BLOCK DIAGRAM |
K4S280432B-TC/L10 |
66MHz(CL=2 &3) |
|
|
|
|
|
|
|
|
||||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
I/O |
|
|
|
|
|
LWE |
||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Control |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Data Input Register |
|
|
|
|
|
|
|
|
|
LDQM |
||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Bank Select |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Address |
|
CounterRefresh |
BufferRow |
DecoderRow |
|
|
8M x 4 |
AMPSense |
BufferOutput |
|
|
|
|
|
8M x 4 |
DQi |
||||||
|
|
|
|
|
|
|
|
|
|
||
|
|
|
|
|
|
|
|
8M x 4 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
CLK |
|
|
|
|
|
|
|
8M x 4 |
|
|
|
|
Register |
|
LRAS |
LCBR |
Buffer.Col |
|
|
|
|
|
|
ADD |
|
|
|
|
|
|
|
||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Column Decoder |
|
|
|
|
|
|
|
|
|
|
|
Latency & Burst Length |
|
|
|
|
|
LCKE |
|
|
|
|
|
Programming Register |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||
|
|
LRAS |
LCBR |
LWE |
LCAS |
|
LWCBR |
|
LDQM |
|
|
|
|
|
|
|
Timing Register |
|
|
|
|
|
|
|
CLK |
CKE |
|
CS |
RAS |
CAS |
WE |
DQM |
|
|
|
* Samsung Electronics reserves the right to change products or specification without notice.
Rev. 0.0 Aug. 1999
|
K4S280432B |
|
|
|
|
|
|
|
CMOS SDRAM |
||||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
PIN CONFIGURATION (Top view) |
|
|
|
|
|
|
|
|
|
|
|
|
|||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
VDD |
|
|
1 |
54 |
|
|
VSS |
|
|
|
|
|
||
|
|
|
|
|
|
|
N.C |
|
|
2 |
53 |
|
|
N.C |
|
|
|
|
|
||
|
|
|
|
|
|
VDDQ |
|
|
3 |
52 |
|
|
VSSQ |
|
|
|
|
|
|||
|
|
|
|
|
|
|
N.C |
|
|
4 |
51 |
|
|
N.C |
|
|
|
|
|
||
|
|
|
|
|
|
|
DQ0 |
|
|
5 |
50 |
|
|
DQ3 |
|
|
|
|
|
||
|
|
|
|
|
|
VSSQ |
|
|
6 |
49 |
|
|
VDDQ |
|
|
|
|
|
|||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|||||||
|
|
|
|
|
|
|
N.C |
|
|
7 |
48 |
|
|
N.C |
|
|
|
|
|
||
|
|
|
|
|
|
|
N.C |
|
|
8 |
47 |
|
|
N.C |
|
|
|
|
|
||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||||||
|
|
|
|
|
|
VDDQ |
|
|
9 |
46 |
|
|
VSSQ |
|
|
|
|
|
|||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|||||||
|
|
|
|
|
|
|
N.C |
|
|
10 |
45 |
|
|
N.C |
|
|
|
|
|
||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||||||
|
|
|
|
|
|
|
DQ1 |
|
|
11 |
44 |
|
|
DQ2 |
|
|
|
|
|
||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||||||
|
|
|
|
|
|
VSSQ |
|
|
12 |
43 |
|
|
VDDQ |
|
|
|
|
|
|||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|||||||
|
|
|
|
|
|
|
N.C |
|
|
13 |
42 |
|
|
N.C |
|
|
|
|
|
||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||||||
|
|
|
|
|
|
|
VDD |
|
|
14 |
41 |
|
|
VSS |
|
|
|
|
|
||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||||||
|
|
|
|
|
|
|
N.C |
|
|
15 |
40 |
|
|
N.C/RFU |
|
|
|
|
|
||
|
|
|
|
|
|
|
|
WE |
|
|
|
16 |
39 |
|
|
DQM |
|
|
|
|
|
|
|
|
|
|
|
|
CAS |
|
|
17 |
38 |
|
|
CLK |
|
|
|
|
|
||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||||||
|
|
|
|
|
|
|
RAS |
|
|
18 |
37 |
|
|
CKE |
|
|
|
|
|
||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||||||
|
|
|
|
|
|
|
|
CS |
|
|
19 |
36 |
|
|
N.C |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|||||
|
|
|
|
|
|
|
BA0 |
|
|
20 |
35 |
|
|
A11 |
|
|
|
|
|
||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||||||
|
|
|
|
|
|
|
BA1 |
|
|
21 |
34 |
|
|
A9 |
|
|
|
|
|
||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||||||
|
|
|
|
|
|
A10/AP |
|
|
22 |
33 |
|
|
A8 |
|
|
|
|
|
|||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|||||||
|
|
|
|
|
|
|
|
A0 |
|
|
23 |
32 |
|
|
A7 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|||||
|
|
|
|
|
|
|
|
A1 |
|
|
24 |
31 |
|
|
A6 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|||||
|
|
|
|
|
|
|
|
A2 |
|
|
25 |
30 |
|
|
A5 |
54Pin TSOP (II) |
|||||
|
|
|
|
|
|
|
|
|
|
|
|
||||||||||
|
|
|
|
|
|
|
|
A3 |
|
|
26 |
29 |
|
|
A4 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
(400mil x 875mil) |
|||||||||
|
|
|
|
|
|
|
VDD |
|
|
27 |
28 |
|
|
VSS |
|||||||
|
|
|
|
|
|
|
|
|
|
|
(0.8 mm Pin pitch) |
||||||||||
|
PIN FUNCTION DESCRIPTION |
|
|
|
|
|
|
|
|||||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||
|
|
|
|
Pin |
Name |
|
|
|
|
|
|
|
|
Input Function |
|||||||
|
|
CLK |
System clock |
|
|
Active on the positive going edge to sample all inputs. |
|||||||||||||||
|
|
|
|
|
|
|
|
|
|
|
Disables or enables device operation by masking or enabling all inputs except |
||||||||||
|
|
CS |
Chip select |
|
|
||||||||||||||||
|
|
|
|
CLK, CKE and DQM |
|
|
|
|
|
|
|||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||||||||
|
|
|
|
|
|
|
|
|
|
|
Masks system clock to freeze operation from the next clock cycle. |
||||||||||
|
|
CKE |
Clock enable |
|
|
CKE should be enabled at least one cycle prior to new command. |
|||||||||||||||
|
|
|
|
|
|
|
|
|
|
|
Disable input buffers for power down in standby. |
||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||||||||
|
|
A0 ~ A11 |
Address |
|
|
Row/column addresses are multiplexed on the same pins. |
|||||||||||||||
|
|
|
|
Row address : RA0 ~ RA11, Column address : CA0 ~ CA9, CA11 |
|||||||||||||||||
|
|
|
|
|
|
|
|
|
|
|
|||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||||||||
|
|
BA0 ~ BA1 |
Bank select address |
|
|
Selects bank to be activated during row address latch time. |
|||||||||||||||
|
|
|
|
Selects bank for read/write during column address latch time. |
|||||||||||||||||
|
|
|
|
|
|
|
|
|
|
|
|||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Latches row addresses on the positive going edge of the CLK with RAS low. |
||||||||||
|
|
RAS |
Row address strobe |
|
|
||||||||||||||||
|
|
|
|
Enables row access & precharge. |
|
|
|
|
|
||||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Latches column addresses on the positive going edge of the CLK with CAS low. |
||||||||||
|
|
CAS |
Column address strobe |
|
|
||||||||||||||||
|
|
|
|
Enables column access. |
|
|
|
|
|
|
|||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||||||||
|
|
|
|
|
|
|
|
|
|
|
Enables write operation and row precharge. |
||||||||||
|
|
WE |
Write enable |
|
|
||||||||||||||||
|
|
|
|
Latches data in starting from CAS, WE active. |
|||||||||||||||||
|
|
|
|
|
|
|
|
|
|
|
|||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||||||||
|
|
DQM |
Data input/output mask |
|
|
Makes data output Hi-Z, tSHZ after the clock and masks the output. |
|||||||||||||||
|
|
|
|
Blocks data input when DQM active. |
|||||||||||||||||
|
|
|
|
|
|
|
|
|
|
|
|||||||||||
|
|
|
|
|
|
|
|
|
|||||||||||||
|
|
DQ0 ~ 3 |
Data input/output |
|
|
Data inputs/outputs are multiplexed on the same pins. |
|||||||||||||||
|
|
VDD/VSS |
Power supply/ground |
|
|
Power and ground for the input buffers and the core logic. |
|||||||||||||||
|
|
VDDQ/VSSQ |
Data output power/ground |
|
|
Isolated power supply and ground for the output buffers to provide improved noise |
|||||||||||||||
|
|
|
|
immunity. |
|
|
|
|
|
|
|
|
|
||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||
|
|
N.C/RFU |
No connection |
|
|
This pin is recommended to be left No Connection on the device. |
|||||||||||||||
|
|
/reserved for future use |
|
|
|||||||||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Rev. 0.0 Aug. 1999 |