19 DRAM 78

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Part RoHS Manufacturer Memory IC Type Temperature Grade No. of Terminals Package Code Refresh Cycles Package Shape Package Body Material Access Mode Surface Mount No. of Functions Technology Screening Level Nominal Negative Supply Voltage Terminal Form Parallel or Serial Operating Mode Maximum Supply Current No. of Words Sequential Burst Length Self Refresh Input/Output Type Nominal Supply Voltage / Vsup (V) Mixed Memory Type Power Supplies (V) Memory Width Package Style (Meter) Package Equivalence Code Alternate Memory Width Sub-Category Terminal Pitch Maximum Operating Temperature Reverse Pinout Output Characteristics Organization No. of Words Code Minimum Standby Voltage Minimum Operating Temperature Terminal Finish Terminal Position No. of Ports JESD-30 Code Moisture Sensitivity Level (MSL) Maximum Supply Voltage (Vsup) Maximum Seated Height Maximum Clock Frequency (fCLK) Width Qualification Memory Density Minimum Supply Voltage (Vsup) Additional Features JESD-609 Code Maximum Time At Peak Reflow Temperature (s) Peak Reflow Temperature (C) Maximum Standby Current Interleaved Burst Length Length Maximum Access Time

KM41C1000DZ-L6

Samsung

FAST PAGE DRAM

COMMERCIAL

19

ZIP

512

RECTANGULAR

PLASTIC/EPOXY

FAST PAGE

NO

1

CMOS

THROUGH-HOLE

ASYNCHRONOUS

60 mA

1048576 words

SEPARATE

5

5

1

IN-LINE

ZIP20,.1

DRAMs

1.27 mm

70 Cel

3-STATE

1MX1

1M

0 Cel

TIN LEAD

ZIG-ZAG

1

R-PZIP-T19

5.5 V

10.16 mm

2.96 mm

Not Qualified

1048576 bit

4.5 V

RAS ONLY/CAS BEFORE RAS/HIDDEN REFRESH

e0

.0001 Amp

26.165 mm

60 ns

KM44C268BZ-10

Samsung

STATIC COLUMN DRAM

COMMERCIAL

19

ZIP

512

RECTANGULAR

PLASTIC/EPOXY

STATIC COLUMN

NO

1

CMOS

THROUGH-HOLE

ASYNCHRONOUS

60 mA

262144 words

COMMON

5

5

4

IN-LINE

ZIP20,.1

SRAMs

1.27 mm

70 Cel

3-STATE

256KX4

256K

0 Cel

TIN LEAD

ZIG-ZAG

1

R-PZIP-T19

5.5 V

10.16 mm

2.96 mm

Not Qualified

1048576 bit

4.5 V

RAS ONLY/CAS BEFORE RAS/HIDDEN REFRESH

e0

.001 Amp

26.165 mm

100 ns

KM41C1002BZ-7

Samsung

STATIC COLUMN DRAM

COMMERCIAL

19

ZIP

512

RECTANGULAR

PLASTIC/EPOXY

STATIC COLUMN

NO

1

CMOS

THROUGH-HOLE

ASYNCHRONOUS

80 mA

1048576 words

SEPARATE

5

5

1

IN-LINE

ZIP20,.1

SRAMs

1.27 mm

70 Cel

3-STATE

1MX1

1M

0 Cel

TIN LEAD

ZIG-ZAG

1

R-PZIP-T19

5.5 V

10.16 mm

2.96 mm

Not Qualified

1048576 bit

4.5 V

RAS ONLY/CAS BEFORE RAS/HIDDEN REFRESH

e0

.001 Amp

26.165 mm

70 ns

KM44C256DZ-6

Samsung

FAST PAGE DRAM

COMMERCIAL

19

ZIP

512

RECTANGULAR

PLASTIC/EPOXY

FAST PAGE

NO

1

CMOS

THROUGH-HOLE

ASYNCHRONOUS

60 mA

262144 words

COMMON

5

5

4

IN-LINE

ZIP20,.1

DRAMs

1.27 mm

70 Cel

3-STATE

256KX4

256K

0 Cel

TIN LEAD

ZIG-ZAG

1

R-PZIP-T19

5.5 V

10.16 mm

2.96 mm

Not Qualified

1048576 bit

4.5 V

RAS ONLY/CAS BEFORE RAS/HIDDEN REFRESH

e0

.001 Amp

26.165 mm

60 ns

KM44C256BZ-10

Samsung

FAST PAGE DRAM

COMMERCIAL

19

ZIP

512

RECTANGULAR

PLASTIC/EPOXY

FAST PAGE

NO

1

CMOS

THROUGH-HOLE

ASYNCHRONOUS

60 mA

262144 words

COMMON

5

5

4

IN-LINE

ZIP20,.1

DRAMs

1.27 mm

70 Cel

3-STATE

256KX4

256K

0 Cel

TIN LEAD

ZIG-ZAG

1

R-PZIP-T19

5.5 V

10.16 mm

2.96 mm

Not Qualified

1048576 bit

4.5 V

RAS ONLY/CAS BEFORE RAS/HIDDEN REFRESH

e0

.001 Amp

26.165 mm

100 ns

KM41C1000BZ-10

Samsung

FAST PAGE DRAM

COMMERCIAL

19

ZIP

512

RECTANGULAR

PLASTIC/EPOXY

FAST PAGE

NO

1

CMOS

THROUGH-HOLE

ASYNCHRONOUS

60 mA

1048576 words

SEPARATE

5

5

1

IN-LINE

ZIP20,.1

DRAMs

1.27 mm

70 Cel

3-STATE

1MX1

1M

0 Cel

TIN LEAD

ZIG-ZAG

1

R-PZIP-T19

5.5 V

10.16 mm

2.96 mm

Not Qualified

1048576 bit

4.5 V

RAS ONLY/CAS BEFORE RAS/HIDDEN REFRESH

e0

.001 Amp

26.165 mm

100 ns

KM41C1000BLZ-7

Samsung

FAST PAGE DRAM

COMMERCIAL

19

ZIP

512

RECTANGULAR

PLASTIC/EPOXY

FAST PAGE

NO

1

CMOS

THROUGH-HOLE

ASYNCHRONOUS

80 mA

1048576 words

SEPARATE

5

5

1

IN-LINE

ZIP20,.1

DRAMs

1.27 mm

70 Cel

3-STATE

1MX1

1M

0 Cel

TIN LEAD

ZIG-ZAG

1

R-PZIP-T19

5.5 V

10.16 mm

2.96 mm

Not Qualified

1048576 bit

4.5 V

RAS ONLY/CAS BEFORE RAS/HIDDEN REFRESH

e0

.0002 Amp

26.165 mm

70 ns

KM44C258BZ-8

Samsung

STATIC COLUMN DRAM

COMMERCIAL

19

ZIP

512

RECTANGULAR

PLASTIC/EPOXY

STATIC COLUMN

NO

1

CMOS

THROUGH-HOLE

ASYNCHRONOUS

70 mA

262144 words

COMMON

5

5

4

IN-LINE

ZIP20,.1

SRAMs

1.27 mm

70 Cel

3-STATE

256KX4

256K

0 Cel

TIN LEAD

ZIG-ZAG

1

R-PZIP-T19

5.5 V

10.16 mm

2.96 mm

Not Qualified

1048576 bit

4.5 V

RAS ONLY/CAS BEFORE RAS/HIDDEN REFRESH

e0

.001 Amp

26.165 mm

80 ns

KM44C256BZ-7

Samsung

FAST PAGE DRAM

COMMERCIAL

19

ZIP

512

RECTANGULAR

PLASTIC/EPOXY

FAST PAGE

NO

1

CMOS

THROUGH-HOLE

ASYNCHRONOUS

80 mA

262144 words

COMMON

5

5

4

IN-LINE

ZIP20,.1

DRAMs

1.27 mm

70 Cel

3-STATE

256KX4

256K

0 Cel

TIN LEAD

ZIG-ZAG

1

R-PZIP-T19

5.5 V

10.16 mm

2.96 mm

Not Qualified

1048576 bit

4.5 V

RAS ONLY/CAS BEFORE RAS/HIDDEN REFRESH

e0

.001 Amp

26.165 mm

70 ns

KM44C268BZ-8

Samsung

STATIC COLUMN DRAM

COMMERCIAL

19

ZIP

512

RECTANGULAR

PLASTIC/EPOXY

STATIC COLUMN

NO

1

CMOS

THROUGH-HOLE

ASYNCHRONOUS

70 mA

262144 words

COMMON

5

5

4

IN-LINE

ZIP20,.1

SRAMs

1.27 mm

70 Cel

3-STATE

256KX4

256K

0 Cel

TIN LEAD

ZIG-ZAG

1

R-PZIP-T19

5.5 V

10.16 mm

2.96 mm

Not Qualified

1048576 bit

4.5 V

RAS ONLY/CAS BEFORE RAS/HIDDEN REFRESH

e0

.001 Amp

26.165 mm

80 ns

KM44C268BZ-7

Samsung

STATIC COLUMN DRAM

COMMERCIAL

19

ZIP

512

RECTANGULAR

PLASTIC/EPOXY

STATIC COLUMN

NO

1

CMOS

THROUGH-HOLE

ASYNCHRONOUS

80 mA

262144 words

COMMON

5

5

4

IN-LINE

ZIP20,.1

SRAMs

1.27 mm

70 Cel

3-STATE

256KX4

256K

0 Cel

TIN LEAD

ZIG-ZAG

1

R-PZIP-T19

5.5 V

10.16 mm

2.96 mm

Not Qualified

1048576 bit

4.5 V

RAS ONLY/CAS BEFORE RAS/HIDDEN REFRESH

e0

.001 Amp

26.165 mm

70 ns

KM44C256BLZ-10

Samsung

FAST PAGE DRAM

COMMERCIAL

19

ZIP

512

RECTANGULAR

PLASTIC/EPOXY

FAST PAGE

NO

1

CMOS

THROUGH-HOLE

ASYNCHRONOUS

60 mA

262144 words

COMMON

5

5

4

IN-LINE

ZIP20,.1

DRAMs

1.27 mm

70 Cel

3-STATE

256KX4

256K

0 Cel

TIN LEAD

ZIG-ZAG

1

R-PZIP-T19

5.5 V

10.16 mm

2.96 mm

Not Qualified

1048576 bit

4.5 V

RAS ONLY/CAS BEFORE RAS/HIDDEN REFRESH

e0

.0002 Amp

26.165 mm

100 ns

KM44C256DZ-L8

Samsung

FAST PAGE DRAM

COMMERCIAL

19

ZIP

512

RECTANGULAR

PLASTIC/EPOXY

FAST PAGE

NO

1

CMOS

THROUGH-HOLE

ASYNCHRONOUS

50 mA

262144 words

COMMON

5

5

4

IN-LINE

ZIP20,.1

DRAMs

1.27 mm

70 Cel

3-STATE

256KX4

256K

0 Cel

TIN LEAD

ZIG-ZAG

1

R-PZIP-T19

5.5 V

10.16 mm

2.96 mm

Not Qualified

1048576 bit

4.5 V

RAS ONLY/CAS BEFORE RAS/HIDDEN REFRESH

e0

.0001 Amp

26.165 mm

80 ns

KM41C1000DZ-7

Samsung

FAST PAGE DRAM

COMMERCIAL

19

ZIP

512

RECTANGULAR

PLASTIC/EPOXY

FAST PAGE

NO

1

CMOS

THROUGH-HOLE

ASYNCHRONOUS

55 mA

1048576 words

SEPARATE

5

5

1

IN-LINE

ZIP20,.1

DRAMs

1.27 mm

70 Cel

3-STATE

1MX1

1M

0 Cel

TIN LEAD

ZIG-ZAG

1

R-PZIP-T19

5.5 V

10.16 mm

2.96 mm

Not Qualified

1048576 bit

4.5 V

RAS ONLY/CAS BEFORE RAS/HIDDEN REFRESH

e0

.001 Amp

26.165 mm

70 ns

KM41C1000BLZ-10

Samsung

FAST PAGE DRAM

COMMERCIAL

19

ZIP

512

RECTANGULAR

PLASTIC/EPOXY

FAST PAGE

NO

1

CMOS

THROUGH-HOLE

ASYNCHRONOUS

60 mA

1048576 words

SEPARATE

5

5

1

IN-LINE

ZIP20,.1

DRAMs

1.27 mm

70 Cel

3-STATE

1MX1

1M

0 Cel

TIN LEAD

ZIG-ZAG

1

R-PZIP-T19

5.5 V

10.16 mm

2.96 mm

Not Qualified

1048576 bit

4.5 V

RAS ONLY/CAS BEFORE RAS/HIDDEN REFRESH

e0

.0002 Amp

26.165 mm

100 ns

KM41C1001BZ-8

Samsung

NIBBLE MODE DRAM

COMMERCIAL

19

ZIP

512

RECTANGULAR

PLASTIC/EPOXY

NIBBLE

NO

1

CMOS

THROUGH-HOLE

ASYNCHRONOUS

75 mA

1048576 words

SEPARATE

5

5

1

IN-LINE

ZIP20,.1

DRAMs

1.27 mm

70 Cel

3-STATE

1MX1

1M

0 Cel

TIN LEAD

ZIG-ZAG

1

R-PZIP-T19

5.5 V

10.16 mm

2.96 mm

Not Qualified

1048576 bit

4.5 V

RAS ONLY/CAS BEFORE RAS/HIDDEN REFRESH

e0

.001 Amp

26.165 mm

80 ns

KM41C1002BZ-8

Samsung

STATIC COLUMN DRAM

COMMERCIAL

19

ZIP

512

RECTANGULAR

PLASTIC/EPOXY

STATIC COLUMN

NO

1

CMOS

THROUGH-HOLE

ASYNCHRONOUS

70 mA

1048576 words

SEPARATE

5

5

1

IN-LINE

ZIP20,.1

SRAMs

1.27 mm

70 Cel

3-STATE

1MX1

1M

0 Cel

TIN LEAD

ZIG-ZAG

1

R-PZIP-T19

5.5 V

10.16 mm

2.96 mm

Not Qualified

1048576 bit

4.5 V

RAS ONLY/CAS BEFORE RAS/HIDDEN REFRESH

e0

.001 Amp

26.165 mm

80 ns

KM41C1002BZ-10

Samsung

STATIC COLUMN DRAM

COMMERCIAL

19

ZIP

512

RECTANGULAR

PLASTIC/EPOXY

STATIC COLUMN

NO

1

CMOS

THROUGH-HOLE

ASYNCHRONOUS

60 mA

1048576 words

SEPARATE

5

5

1

IN-LINE

ZIP20,.1

SRAMs

1.27 mm

70 Cel

3-STATE

1MX1

1M

0 Cel

TIN LEAD

ZIG-ZAG

1

R-PZIP-T19

5.5 V

10.16 mm

2.96 mm

Not Qualified

1048576 bit

4.5 V

RAS ONLY/CAS BEFORE RAS/HIDDEN REFRESH

e0

.001 Amp

26.165 mm

100 ns

KM44C266BZ-10

Samsung

FAST PAGE DRAM

COMMERCIAL

19

ZIP

512

RECTANGULAR

PLASTIC/EPOXY

FAST PAGE

NO

1

CMOS

THROUGH-HOLE

ASYNCHRONOUS

60 mA

262144 words

COMMON

5

5

4

IN-LINE

ZIP20,.1

DRAMs

1.27 mm

70 Cel

3-STATE

256KX4

256K

0 Cel

TIN LEAD

ZIG-ZAG

1

R-PZIP-T19

5.5 V

10.16 mm

2.96 mm

Not Qualified

1048576 bit

4.5 V

RAS ONLY/CAS BEFORE RAS/HIDDEN REFRESH

e0

.001 Amp

26.165 mm

100 ns

KM44C256DZ-8

Samsung

FAST PAGE DRAM

COMMERCIAL

19

ZIP

512

RECTANGULAR

PLASTIC/EPOXY

FAST PAGE

NO

1

CMOS

THROUGH-HOLE

ASYNCHRONOUS

50 mA

262144 words

COMMON

5

5

4

IN-LINE

ZIP20,.1

DRAMs

1.27 mm

70 Cel

3-STATE

256KX4

256K

0 Cel

TIN LEAD

ZIG-ZAG

1

R-PZIP-T19

5.5 V

10.16 mm

2.96 mm

Not Qualified

1048576 bit

4.5 V

RAS ONLY/CAS BEFORE RAS/HIDDEN REFRESH

e0

.001 Amp

26.165 mm

80 ns

KM41C1001BZ-7

Samsung

NIBBLE MODE DRAM

COMMERCIAL

19

ZIP

512

RECTANGULAR

PLASTIC/EPOXY

NIBBLE

NO

1

CMOS

THROUGH-HOLE

ASYNCHRONOUS

85 mA

1048576 words

SEPARATE

5

5

1

IN-LINE

ZIP20,.1

DRAMs

1.27 mm

70 Cel

3-STATE

1MX1

1M

0 Cel

TIN LEAD

ZIG-ZAG

1

R-PZIP-T19

5.5 V

10.16 mm

2.96 mm

Not Qualified

1048576 bit

4.5 V

RAS ONLY/CAS BEFORE RAS/HIDDEN REFRESH

e0

.001 Amp

26.165 mm

70 ns

KM44C256BLZ-8

Samsung

FAST PAGE DRAM

COMMERCIAL

19

ZIP

512

RECTANGULAR

PLASTIC/EPOXY

FAST PAGE

NO

1

CMOS

THROUGH-HOLE

ASYNCHRONOUS

70 mA

262144 words

COMMON

5

5

4

IN-LINE

ZIP20,.1

DRAMs

1.27 mm

70 Cel

3-STATE

256KX4

256K

0 Cel

TIN LEAD

ZIG-ZAG

1

R-PZIP-T19

5.5 V

10.16 mm

2.96 mm

Not Qualified

1048576 bit

4.5 V

RAS ONLY/CAS BEFORE RAS/HIDDEN REFRESH

e0

.0002 Amp

26.165 mm

80 ns

KM44C258BZ-7

Samsung

STATIC COLUMN DRAM

COMMERCIAL

19

ZIP

512

RECTANGULAR

PLASTIC/EPOXY

STATIC COLUMN

NO

1

CMOS

THROUGH-HOLE

ASYNCHRONOUS

80 mA

262144 words

COMMON

5

5

4

IN-LINE

ZIP20,.1

SRAMs

1.27 mm

70 Cel

3-STATE

256KX4

256K

0 Cel

TIN LEAD

ZIG-ZAG

1

R-PZIP-T19

5.5 V

10.16 mm

2.96 mm

Not Qualified

1048576 bit

4.5 V

RAS ONLY/CAS BEFORE RAS/HIDDEN REFRESH

e0

.001 Amp

26.165 mm

70 ns

KM41C1000BZ-8

Samsung

FAST PAGE DRAM

COMMERCIAL

19

ZIP

512

RECTANGULAR

PLASTIC/EPOXY

FAST PAGE

NO

1

CMOS

THROUGH-HOLE

ASYNCHRONOUS

70 mA

1048576 words

SEPARATE

5

5

1

IN-LINE

ZIP20,.1

DRAMs

1.27 mm

70 Cel

3-STATE

1MX1

1M

0 Cel

TIN LEAD

ZIG-ZAG

1

R-PZIP-T19

5.5 V

10.16 mm

2.96 mm

Not Qualified

1048576 bit

4.5 V

RAS ONLY/CAS BEFORE RAS/HIDDEN REFRESH

e0

.001 Amp

26.165 mm

80 ns

KM41C1001BZ-10

Samsung

NIBBLE MODE DRAM

COMMERCIAL

19

ZIP

512

RECTANGULAR

PLASTIC/EPOXY

NIBBLE

NO

1

CMOS

THROUGH-HOLE

ASYNCHRONOUS

65 mA

1048576 words

SEPARATE

5

5

1

IN-LINE

ZIP20,.1

DRAMs

1.27 mm

70 Cel

3-STATE

1MX1

1M

0 Cel

TIN LEAD

ZIG-ZAG

1

R-PZIP-T19

5.5 V

10.16 mm

2.96 mm

Not Qualified

1048576 bit

4.5 V

RAS ONLY/CAS BEFORE RAS/HIDDEN REFRESH

e0

.001 Amp

26.165 mm

100 ns

KM41C1002BZ-6

Samsung

STATIC COLUMN DRAM

COMMERCIAL

19

ZIP

512

RECTANGULAR

PLASTIC/EPOXY

STATIC COLUMN

NO

1

CMOS

THROUGH-HOLE

ASYNCHRONOUS

90 mA

1048576 words

SEPARATE

5

5

1

IN-LINE

ZIP20,.1

SRAMs

1.27 mm

70 Cel

3-STATE

1MX1

1M

0 Cel

TIN LEAD

ZIG-ZAG

1

R-PZIP-T19

5.5 V

10.16 mm

2.96 mm

Not Qualified

1048576 bit

4.5 V

RAS ONLY/CAS BEFORE RAS/HIDDEN REFRESH

e0

.001 Amp

26.165 mm

60 ns

KM41C1000BZ-7

Samsung

FAST PAGE DRAM

COMMERCIAL

19

ZIP

512

RECTANGULAR

PLASTIC/EPOXY

FAST PAGE

NO

1

CMOS

THROUGH-HOLE

ASYNCHRONOUS

80 mA

1048576 words

SEPARATE

5

5

1

IN-LINE

ZIP20,.1

DRAMs

1.27 mm

70 Cel

3-STATE

1MX1

1M

0 Cel

TIN LEAD

ZIG-ZAG

1

R-PZIP-T19

5.5 V

10.16 mm

2.96 mm

Not Qualified

1048576 bit

4.5 V

RAS ONLY/CAS BEFORE RAS/HIDDEN REFRESH

e0

.001 Amp

26.165 mm

70 ns

KM41C1000DZ-6

Samsung

FAST PAGE DRAM

COMMERCIAL

19

ZIP

512

RECTANGULAR

PLASTIC/EPOXY

FAST PAGE

NO

1

CMOS

THROUGH-HOLE

ASYNCHRONOUS

60 mA

1048576 words

SEPARATE

5

5

1

IN-LINE

ZIP20,.1

DRAMs

1.27 mm

70 Cel

3-STATE

1MX1

1M

0 Cel

TIN LEAD

ZIG-ZAG

1

R-PZIP-T19

5.5 V

10.16 mm

2.96 mm

Not Qualified

1048576 bit

4.5 V

RAS ONLY/CAS BEFORE RAS/HIDDEN REFRESH

e0

.001 Amp

26.165 mm

60 ns

KM44C256DZ-L6

Samsung

FAST PAGE DRAM

COMMERCIAL

19

ZIP

512

RECTANGULAR

PLASTIC/EPOXY

FAST PAGE

NO

1

CMOS

THROUGH-HOLE

ASYNCHRONOUS

60 mA

262144 words

COMMON

5

5

4

IN-LINE

ZIP20,.1

DRAMs

1.27 mm

70 Cel

3-STATE

256KX4

256K

0 Cel

TIN LEAD

ZIG-ZAG

1

R-PZIP-T19

5.5 V

10.16 mm

2.96 mm

Not Qualified

1048576 bit

4.5 V

RAS ONLY/CAS BEFORE RAS/HIDDEN REFRESH

e0

.0001 Amp

26.165 mm

60 ns

KM41C1000DZ-8

Samsung

FAST PAGE DRAM

COMMERCIAL

19

ZIP

512

RECTANGULAR

PLASTIC/EPOXY

FAST PAGE

NO

1

CMOS

THROUGH-HOLE

ASYNCHRONOUS

50 mA

1048576 words

SEPARATE

5

5

1

IN-LINE

ZIP20,.1

DRAMs

1.27 mm

70 Cel

3-STATE

1MX1

1M

0 Cel

TIN LEAD

ZIG-ZAG

1

R-PZIP-T19

5.5 V

10.16 mm

2.96 mm

Not Qualified

1048576 bit

4.5 V

RAS ONLY/CAS BEFORE RAS/HIDDEN REFRESH

e0

.001 Amp

26.165 mm

80 ns

DRAM

DRAM, or Dynamic Random Access Memory, is a type of volatile computer memory that stores data in a digital format. It is commonly used in personal computers, laptops, mobile devices, and other digital devices.

DRAM stores digital data as a charge on a capacitor. Each capacitor in DRAM represents one bit of data, and the state of the capacitor is refreshed periodically to maintain its charge. The refreshing process is necessary because the charge on the capacitor leaks over time, leading to data loss. The refreshing process is managed by a control circuitry that is integrated into the DRAM module.

DRAM is an important component of modern computer systems because it provides fast access to data for the processor. DRAM access times are measured in nanoseconds, which is much faster than access times for secondary storage devices like hard drives or solid-state drives. DRAM is also cheaper and more energy-efficient than other types of computer memory.

There are different types of DRAM, including SDRAM (Synchronous DRAM), DDR SDRAM (Double Data Rate Synchronous DRAM), and GDDR SDRAM (Graphics Double Data Rate Synchronous DRAM). These different types of DRAM have different characteristics, such as speed, capacity, and power consumption, and are used in different types of computer systems.

One of the disadvantages of DRAM is that it is volatile, which means that it loses data when the power is turned off. To prevent data loss, DRAM is typically used in conjunction with non-volatile storage devices like hard drives or solid-state drives, which can store data even when the power is turned off.