Datasheet K4S281632D-NL7C, K4S281632D-NL75, K4S281632D-NL60, K4S281632D-NL1H, K4S281632D-NC7C Datasheet (Samsung)

K4S281632D

Rev. 0.1 Sept. 2001

CMOS SDRAM

128Mbit SDRAM

2M x 16Bit x 4 Banks

Synchronous DRAM

LVTTL

Rev. 0.1

Sept. 2001

* Samsung Electronics reserves the right to change products or specification without notice.

K4S281632D

Rev. 0.1 Sept. 2001

CMOS SDRAM

Revision History
Revision 0.0 (July, 2001)
Revision 0.1 (Sep., 2001)

• Redefined IDD1 & IDD4 in DC Characteristics

• Changed the Notes in Operating AC Parameter.
< Before >

5. For 1H/1L, tRDL=1CLK and tDAL=1CLK+tRP is also supported .
SAMSUNG recommends tRDL=2CLK and tDAL=2CLK + tRP.
< After >

5.In 100MHz and below 100MHz operating conditions, tRDL=1CLK and tDAL=1CLK + 20ns is also supported.
SAMSUNG recommends tRDL=2CLK and tDAL=2CLK + tRP.

K4S281632D

Rev. 0.1 Sept. 2001

2M x 16Bit x 4 Banks Synchronous DRAM

• JEDEC standard 3.3V power supply

• LVTTL compatible with multiplexed address

• Four banks operation

• MRS cycle with address key programs

-. CAS latency (2 & 3)

-. Burst length (1, 2, 4, 8 & Full page)

-. Burst type (Sequential & Interleave)

• All inputs are sampled at the positive going edge of the system
clock.

• Burst read single-bit write operation

• DQM for masking

• Auto & self refresh

• 64ms refresh period (4K cycle)

CMOS SDRAM

GENERAL DESCRIPTIONFEATURES

The K4S281632D is 134,217,728 bits synchronous high data
rate Dynamic RAM organized as 4 x 2,097,152 words by 16
bits, fabricated with SAMSUNG′s high performance CMOS
technology. Synchronous design allows precise cycle control
with the use of system clock I/O transactions are possible on
every clock cycle. Range of operating frequencies, programma­ble burst length and programmable latencies allow the same
device to be useful for a variety of high bandwidth, high perfor­mance memory system applications.

ORDERING INFORMATION

Part No. Max Freq. Interface Package

K4S281632D-NC60/NL60 166MHz(CL=3)
K4S281632D-NC7C/NL7C 133MHz(CL=2)
K4S281632D-NC75/NL75 133MHz(CL=3)
K4S281632D-NC1H/NL1H 100MHz(CL=2)

LVTTL

54

sTSOP(II)

FUNCTIONAL BLOCK DIAGRAM

Bank Select

Refresh Counter

Row Buffer

Address Register

CLK

ADD

LRAS

LCBR

LCKE

LRAS LCBR LWE LDQM

Data Input Register

Row Decoder Col. Buffer

LCAS LWCBR

2M x 16
2M x 16
2M x 16
2M x 16

Column Decoder

Latency & Burst Length

Programming Register

LWE

LDQM

Sense AMP

Output BufferI/O Control

DQi

CLK CKE CS RAS CAS WE LDQM

* Samsung Electronics reserves the right to change products or specification without notice.

Timing Register

UDQM

K4S281632D

Rev. 0.1 Sept. 2001

PIN CONFIGURATION (Top view)

VDD

VDD

WE

CS
BA0
BA1

A0
A1
A2
A3

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

DQ0

VDDQ

DQ1
DQ2

VSSQ

DQ3
DQ4

VDDQ

DQ5
DQ6

VSSQ

DQ7

LDQM

CAS
RAS

A10/AP

54Pin sTSOP (II)

(400mil x 441mil)

(0.4 mm Pin pitch)

CMOS SDRAM

VSS

54

DQ15

53

VSSQ

52

DQ14

51

DQ13

50

VDDQ

49

DQ12

48

DQ11

47

VSSQ

46

DQ10

45

DQ9

44

VDDQ

43

DQ8

42

VSS

41

N.C/RFU

40

UDQM

39

CLK

38

CKE

37

N.C

36

A11

35

A9

34

A8

33

A7

32

A6

31

A5

30

A4

29

VSS

28

PIN FUNCTION DESCRIPTION

Pin Name Input Function

CLK System clock Active on the positive going edge to sample all inputs.
CS Chip select

CKE Clock enable

A0 ~ A11 Address

BA0 ~ BA1 Bank select address

RAS Row address strobe

CAS Column address strobe

WE Write enable

L(U)DQM Data input/output mask

DQ0 ~ 15 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

N.C/RFU

No connection
/reserved for future use

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 : 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 L(U)DQM active.

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.

K4S281632D

Rev. 0.1 Sept. 2001

CMOS SDRAM

ABSOLUTE MAXIMUM RATINGS

Parameter Symbol Value Unit

Voltage on any pin relative to Vss VIN, VOUT -1.0 ~ 4.6 V
Voltage on VDD supply relative to Vss VDD, VDDQ -1.0 ~ 4.6 V
Storage temperature TSTG -55 ~ +150 °C
Power dissipation PD 1 W
Short circuit current IOS 50 mA

Note :

Permanent device damage may occur if "ABSOLUTE MAXIMUM RATINGS" are exceeded.
Functional operation should be restricted to recommended operating condition.
Exposure to higher than recommended voltage for extended periods of time could affect device reliability.

DC OPERATING CONDITIONS

Recommended operating conditions (Voltage referenced to VSS = 0V, TA = 0 to 70°C)

Parameter Symbol Min Typ Max Unit Note

Supply voltage VDD, VDDQ 3.0 3.3 3.6 V 4
Input logic high voltage VIH 2.0 3.0 VDD+0.3 V 1
Input logic low voltage VIL -0.3 0 0.8 V 2
Output logic high voltage VOH 2.4 - - V IOH = -2mA
Output logic low voltage VOL - - 0.4 V IOL = 2mA
Input leakage current ILI -10 - 10 uA 3

Notes :

1. VIH (max) = 5.6V AC.The overshoot voltage duration is ≤ 3ns.

2. VIL (min) = -2.0V AC. The undershoot voltage duration is ≤ 3ns.

3. Any input 0V ≤ VIN ≤ VDDQ,
Input leakage currents include Hi-Z output leakage for all bi-directional buffers with Tri-State outputs.

4. The VDD condition of K4S281632D-60 is 3.135V~3.6V.

CAPACITANCE (VDD = 3.3V, TA = 23°C, f = 1MHz, VREF =1.4V ± 200 mV)

Pin Symbol Min Max Unit Note

Clock CCLK 2.5 4.0 pF 1
RAS, CAS, WE, CS, CKE, DQM CIN 2.5 5.0 pF 2
Address CADD 2.5 5.0 pF 2
DQ0 ~ DQ15 COUT 4.0 6.5 pF 3

Notes :

1. -75/7C specify a maximum value of 3.5pF

2. -75/7C specify a maximum value of 3.8pF

3. -75/7C specify a maximum value of 6.0pF

K4S281632D

Rev. 0.1 Sept. 2001

DC CHARACTERISTICS

(Recommended operating condition unless otherwise noted, TA = 0 to 70°C)

CMOS SDRAM

Parameter Symbol Test Condition

Operating current
(One bank active)

Precharge standby cur­rent in power-down mode

Precharge standby cur­rent in non power-down
mode

Active standby current in
power-down mode

Active standby current in
non power-down mode
(One bank active)

Operating current
(Burst mode)

Version

60 -7C -75 -1H

Burst length = 1

ICC1

tRC ≥ tRC(min)
IO = 0 mA

ICC2P CKE ≤ VIL(max), tCC = 10ns 2

ICC2PS CKE & CLK ≤ VIL(max), tCC = ∞ 2

ICC2N

ICC2NS

ICC3P CKE ≤ VIL(max), tCC = 10ns 5

ICC3PS CKE & CLK ≤ VIL(max), tCC = ∞ 5

ICC3N

ICC3NS

CKE ≥ VIH(min), CS ≥ VIH(min), tCC = 10ns
Input signals are changed one time during 20ns

CKE ≥ VIH(min), CLK ≤ VIL(max), tCC = ∞
Input signals are stable

CKE ≥ VIH(min), CS ≥ VIH(min), tCC = 10ns
Input signals are changed one time during 20ns

CKE ≥ VIH(min), CLK ≤ VIL(max), tCC = ∞
Input signals are stable

IO = 0 mA
Page burst

ICC4

4Banks Activated
tCCD = 2CLKs

130 110 100 100 mA 1

150 140 140 130 mA 1

Unit Note

mA

20

mA

10

mA

30 mA

25

mA

Refresh current ICC5 tRC ≥ tRC(min) 220 220 200 190 mA 2

Self refresh current ICC6 CKE ≤ 0.2V

Notes :

1. Measured with outputs open.

2. Refresh period is 64ms.

3. K4S281632D-NC**

4. K4S281632D-NL**

5. Unless otherwise noted, input swing IeveI is CMOS(VIH /VIL=VDDQ/VSSQ)

C 2 mA 3

L 800 uA 4

K4S281632D

Rev. 0.1 Sept. 2001

CMOS SDRAM

AC OPERATING TEST CONDITIONS (VDD = 3.3V ± 0.3V, TA = 0 to 70°C)

Parameter Value Unit

AC input levels (Vih/Vil) 2.4/0.4 V
Input timing measurement reference level 1.4 V
Input rise and fall time tr/tf = 1/1 ns
Output timing measurement reference level 1.4 V
Output load condition See Fig. 2

Output

Notes :

3.3V

1200Ω

VOH (DC) = 2.4V, IOH = -2mA
VOL (DC) = 0.4V, IOL = 2mA

870Ω

1. The DC/AC Test Output Load of K4S281632D-NC/NL60 is 30pF.

2. The VDD condition of K4S281632D-NC/NL60 is 3.135V~3.6V.

50pF

Output

Z0 = 50Ω

(Fig. 2) AC output load circuit (Fig. 1) DC output load circuit

Vtt = 1.4V

50Ω

50pF

OPERATING AC PARAMETER

(AC operating conditions unless otherwise noted)

Parameter Symbol

Row active to row active delay tRRD(min) 12 15 15 20 ns 1
RAS to CAS delay tRCD(min) 18 15 20 20 ns 1
Row precharge time tRP(min) 18 15 20 20 ns 1

Row active time

Row cycle time tRC(min) 60 60 65 70 ns 1
Last data in to row precharge tRDL(min) 2 CLK 2,5
Last data in to Active delay tDAL(min) 2 CLK + tRP - 5

tRAS(min) 42 45 45 50 ns 1

tRAS(max) 100 us

- 60 - 7C - 75 - 1H

Version

Unit Note

Last data in to new col. address delay tCDL(min) 1 CLK 2
Last data in to burst stop tBDL(min) 1 CLK 2
Col. address to col. address delay tCCD(min) 1 CLK 3

Number of valid output
data

Notes :

1. The minimum number of clock cycles is determined by dividing the minimum time required with clock cycle time
and then rounding off to the next higher integer.

2. Minimum delay is required to complete write.

3. All parts allow every cycle column address change.

4. In case of row precharge interrupt, auto precharge and read burst stop.

5. In 100MHz and below 100MHz operating conditions, tRDL=1CLK and tDAL=1CLK + 20ns is also supported.
SAMSUNG recommends tRDL=2CLK and tDAL=2CLK + tRP.

CAS latency=3 2
CAS latency=2 - 1

ea 4

K4S281632D

Rev. 0.1 Sept. 2001

AC CHARACTERISTICS (AC operating conditions unless otherwise noted)

CMOS SDRAM

Parameter Symbol

CLK cycle
time

CLK to valid
output delay

Output data
hold time

CLK high pulse width tCH 2.5 2.5 2.5 3 ns 3
CLK low pulse width tCL 2.5 2.5 2.5 3 ns 3
Input setup time tSS 1.5 1.5 1.5 2 ns 3
Input hold time tSH 1 0.8 0.8 1 ns 3
CLK to output in Low-Z tSLZ 1 1 1 1 ns 2

CLK to output
in Hi-Z

Notes :

1. Parameters depend on programmed CAS latency.

2. If clock rising time is longer than 1ns, (tr/2-0.5)ns should be added to the parameter.

3. Assumed input rise and fall time (tr & tf) = 1ns.
If tr & tf is longer than 1ns, transient time compensation should be considered,
i.e., [(tr + tf)/2-1]ns should be added to the parameter.

CAS latency=3
CAS latency=2 - 7.5 10 10
CAS latency=3
CAS latency=2 - 5.4 6 6
CAS latency=3
CAS latency=2 - 3 3 3

CAS latency=3
CAS latency=2 - 5.4 6 6

tCC

tSAC

tOH

tSHZ

- 60 - 7C - 75 - 1H

Min Max Min Max Min Max Min Max

6

1000

5 5.4 5.4 6

2.5 3 3 3

5 5.4 5.4 6

7.5
1000

7.5
1000

10

1000 ns 1

Unit Note

ns 1,2

ns 2

ns

DQ BUFFER OUTPUT DRIVE CHARACTERISTICS

Parameter Symbol Condition Min Typ Max Unit Notes

Output rise time trh

Output fall time tfh

Output rise time trh

Output fall time tfh

Notes :

1. Rise time specification based on 0pF + 50 Ω to VSS, use these values to design to.

2. Fall time specification based on 0pF + 50 Ω to VDD, use these values to design to.

3. Measured into 50pF only, use these values to characterize to.

4. All measurements done with respect to VSS.

Measure in linear
region : 1.2V ~ 1.8V

Measure in linear
region : 1.2V ~ 1.8V

Measure in linear
region : 1.2V ~ 1.8V

Measure in linear
region : 1.2V ~ 1.8V

1.37 4.37 Volts/ns 3

1.30 3.8 Volts/ns 3

2.8 3.9 5.6 Volts/ns 1,2

2.0 2.9 5.0 Volts/ns 1,2

K4S281632D

Rev. 0.1 Sept. 2001

CMOS SDRAM

IBIS SPECIFICATION

IOH Cha.racteristics (Pull-up)

100MHz

Voltage

(V) I (mA) I (mA) I (mA)

3.45 -2.4

3.3 -27.3

3.0 0.0 -74.1 -0.7

2.6 -21.1 -129.2 -7.5

2.4 -34.1 -153.3 -13.3

2.0 -58.7 -197.0 -27.5

1.8 -67.3 -226.2 -35.5

1.65 -73.0 -248.0 -41.1

1.5 -77.9 -269.7 -47.9

1.4 -80.8 -284.3 -52.4

1.0 -88.6 -344.5 -72.5

0.0 -93.0 -502.4 -93.0

133MHz

Min

100MHz
133MHz

Max

66MHz

Min

66MHz and 100MHz/133MHz Pull-up

0 30.5 1 1.5 2 2.5 3.5

0

-100

-200

-300

mA

-400

-500

-600

Voltage

IOH Min (100MHz/133MHz)
IOH Min (66MHz)
IOH Max (66 and 100MHz/133MHz)

IOL Characteristics (Pull-down)

100MHz

Voltage

(V) I (mA) I (mA) I (mA)

0.0 0.0 0.0 0.0

0.4 27.5 70.2 17.7

0.65 41.8 107.5 26.9

0.85 51.6 133.8 33.3

1.0 58.0 151.2 37.6

1.4 70.7 187.7 46.6

1.5 72.9 194.4 48.0

1.65 75.4 202.5 49.5

1.8 77.0 208.6 50.7

1.95 77.6 212.0 51.5

3.0 80.3 219.6 54.2

3.45 81.4 222.6 54.9

133MHz

Min

100MHz
133MHz

Max

66MHz

Min

66MHz and 100MHz/133MHz Pull-down

250

200

150

mA

100

50

0

0 30.5 1 1.5 2 2.5 3.5

Voltage

IOL Min (100MHz/133MHz)
IOL Min (66MHz)
IOL Max (100MHz/133MHz)

K4S281632D

Rev. 0.1 Sept. 2001

CMOS SDRAM

VDD Clamp @ CLK, CKE, CS, DQM & DQ

VDD (V) I (mA)

0.0 0.0

0.2 0.0

0.4 0.0

0.6 0.0

0.7 0.0

0.8 0.0

0.9 0.0

1.0 0.23

1.2 1.34

1.4 3.02

1.6 5.06

1.8 7.35

2.0 9.83

2.2 12.48

2.4 15.30

2.6 18.31

Minimum VDD clamp current

(Referenced to VDD)

20

15

10

mA

5

0

0 31 2

Voltage

I (mA)

VSS Clamp @ CLK, CKE, CS, DQM & DQ

VSS (V) I (mA)

-2.6 -57.23

-2.4 -45.77

-2.2 -38.26

-2.0 -31.22

-1.8 -24.58

-1.6 -18.37

-1.4 -12.56

-1.2 -7.57

-1.0 -3.37

-0.9 -1.75

-0.8 -0.58

-0.7 -0.05

-0.6 0.0

-0.4 0.0

-0.2 0.0

0.0 0.0

Minimum VSS clamp current

-3 0-2 -1

0

-10

-20

-30

mA

-40

-50

-60

Voltage

I (mA)

K4S281632D

Rev. 0.1 Sept. 2001

SIMPLIFIED TRUTH TABLE

CMOS SDRAM

Command

Register Mode register set H X L L L L X OP code 1,2

Auto refresh

Refresh

Bank active & row addr. H X L L H H X V Row address
Read &

column address

Write &
column address

Burst stop H X L H H L X X 6

Precharge

Clock suspend or
active power down

Precharge power down mode

DQM H X V X 7

No operation command H X

Self
fefresh

Auto precharge disable
Auto precharge enable H 4,5
Auto precharge disable
Auto precharge enable H 4,5

Bank selection
All banks X H

Entry L 3

Exit L H

Entry H L

Exit L H X X X X X

Entry H L

Exit L H

CKEn-1 CKEn CS RAS CAS WE DQM BA0,1 A10/AP

H

H X L H L H X V

H X L H L L X V

H X L L H L X

H

L L L H X X

L H H H

H X X X 3

H X X X

L V V V

H X X X

L H H H

H X X X

L V V V

H X X X

L H H H

X X

L

L

V L

X

X

X

X X

A11,

A9 ~ A0

Column

address

(A0 ~ A8)

Column
address

(A0 ~ A8)

X

X

Note

X

3

3

4

4

Notes :

1. OP Code : Operand code
A0 ~ A11 & BA0 ~ BA1 : Program keys. (@ MRS)

2. MRS can be issued only at all banks precharge state.
A new command can be issued after 2 CLK cycles of MRS.

3. Auto refresh functions are as same as CBR refresh of DRAM.
The automatical precharge without row precharge command is meant by "Auto".
Auto/self refresh can be issued only at all banks precharge state.

4. BA0 ~ BA1 : Bank select addresses.
If both BA0 and BA1 are "Low" at read, write, row active and precharge, bank A is selected.
If both BA0 is "Low" and BA1 is "High" at read, write, row active and precharge, bank B is selected.
If both BA0 is "High" and BA1 is "Low" at read, write, row active and precharge, bank C is selected.
If both BA0 and BA1 are "High" at read, write, row active and precharge, bank D is selected.
If A10/AP is "High" at row precharge, BA0 and BA1 is ignored and all banks are selected.

5. During burst read or write with auto precharge, new read/write command can not be issued.
Another bank read/write command can be issued after the end of burst.
New row active of the associated bank can be issued at tRP after the end of burst.

6. Burst stop command is valid at every burst length.

7. DQM sampled at positive going edge of a CLK and masks the data-in at the very CLK (Write DQM latency is 0),
but makes Hi-Z state the data-out of 2 CLK cycles after. (Read DQM latency is 2)