K4S281632O-LC75000 Datasheet, PDF (7/18 Pages) Samsung semiconductor – 54TSOP(II) with Lead-Free & Halogen-Free (RoHS compliant)

K4S280832O
K4S281632O
datasheet
6. PIN CONFIGURATION (TOP VIEW)
x16 x8
VDD
VDD 1
DQ0 DQ0 2
VDDQ VDDQ 3
DQ1
N.C 4
DQ2 DQ1 5
VSSQ VSSQ 6
DQ3
N.C 7
DQ4 DQ2 8
VDDQ VDDQ 9
DQ5
N.C 10
DQ6 DQ3 11
VSSQ VSSQ 12
DQ7
N.C 13
VDD
VDD 14
LDQM
N.C 15
WE
WE 16
CAS CAS 17
RAS RAS 18
CS
CS 19
BA0 BA0 20
BA1 BA1 21
A10/AP A10/AP 22
A0
A0 23
A1
A1 24
A2
A2 25
A3
A3 26
VDD
VDD 27
x8 x16
54 VSS
VSS
53 DQ7
DQ15
52 VSSQ
VSSQ
51 N.C
DQ14
50 DQ6
DQ13
49 VDDQ
VDDQ
48 N.C
DQ12
47 DQ5
DQ11
46 VSSQ
VSSQ
45 N.C
DQ10
44 DQ4
DQ9
43 VDDQ
VDDQ
42 N.C
DQ8
41 VSS
VSS
40 N.C/RFU N.C/RFU
39 DQM UDQM
38 CLK
CLK
37 CKE
CKE
36 N.C
N.C
35 A11
A11
34 A9
A9
33 A8
A8
32 A7
A7
31 A6
A6
30 A5
A5
29 A4
A4
28 VSS
VSS
Rev. 1.0
SDRAM
54Pin TSOP
(400mil x 875mil)
(0.8 mm Pin pitch)
7. INPUT/OUTPUT FUNCTION DESCRIPTION
Pin
CLK
CS
CKE
Name
System clock
Chip select
Clock enable
A0 ~ A11
Address
BA0 ~ BA1
RAS
CAS
WE
DQM
DQ0 ~ N
V_DD/V_SS
V_DDQ/V_SSQ
N.C/RFU
Bank select address
Row address strobe
Column address strobe
Write enable
Data input/output mask
Data input/output
Power supply/ground
Data output power/ground
No connection
/reserved for future use
Description
Active on the positive going edge to sample all inputs.
Disables or enables device operation by masking or enabling all inputs except
CLK, CKE and DQM
Masks system clock to freeze operation from the next clock cycle.
CKE should be enabled at least one cycle prior to new command.
Disable input buffers for power down in standby.
Row/column addresses are multiplexed on the same pins.
Row address : RA0 ~ RA11,
Column address : (x8 : CA0 ~ CA9), (x16 : CA0 ~ CA8)
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.
Enables row access & precharge.
Latches column addresses on the positive going edge of the CLK with CAS low.
Enables column access.
Enables write operation and row precharge.
Latches data in starting from CAS, WE active.
Makes data output Hi-Z, tSHZ after the clock and masks the output.
Blocks data input when DQM active.
Data inputs/outputs are multiplexed on the same pins.
(x8 : DQ0 ~ 7), (x16 : DQ0 ~ 15)
Power and ground for the input buffers and the core logic.
Isolated power supply and ground for the output buffers to provide improved noise immunity.
This pin is recommended to be left No Connection on the device.
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