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A3R56E40ABF 반도체 회로 부품 판매점

256Mb DDRII Synchronous DRAM



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A3R56E40ABF 데이터시트, 핀배열, 회로
A3R56E40ABF
256Mb DDRII Synchronous DRAM
256Mb DDRII SDRAM Specification
A3R56E40ABF
Zentel Electronics Corp.
Revision 1.2
Dec., 2012


A3R56E40ABF 데이터시트, 핀배열, 회로
A3R56E40ABF
256Mb DDRII Synchronous DRAM
Specifications
Density: 256M bits
Organization
4M words × 16 bits × 4 banks (A3R56E40ABF)
Package
84-ball FBGA(μBGA) (A3R56E40ABF)
Lead-free (RoHS compliant)
Power supply: VDD, VDDQ = 1.8V ± 0.1V
Data rate: 1066Mbps/800Mbps(max.)
1KB page size (A3R56E40ABF)
Row address: A0 to A12
Column address: A0 to A8
Four internal banks for concurrent operation
Interface: SSTL_18
Burst lengths (BL): 4, 8
Burst type (BT):
Sequential (4, 8)
Interleave (4, 8)
/CAS Latency (CL): 3, 4, 5, 6, 7
Precharge: auto precharge option for each burst
access
Driver strength: normal/weak
Refresh: auto-refresh, self-refresh
Refresh cycles: 8192 cycles/64ms
Average refresh period
7.8μs at 0°C TC ≤ +85°C
3.9μs at +85°C < TC ≤ +95°C
Operating case temperature range
TC = 0°C to +95°C
Features
Double-data-rate architecture; two data transfers per clock
cycle
The high-speed data transfer is realized by the 4 bits
prefetch pipelined architecture
Bi-directional differential data strobe (DQS and /DQS) is
transmitted/received with data for capturing data at the
receiver
DQS is edge-aligned with data for READs; center-
aligned with data for WRITEs
Differential clock inputs (CK and /CK)
DLL aligns DQ and DQS transitions with CK
transitions
Commands entered on each positive CK edge; data and
data mask referenced to both edges of DQS
Data mask (DM) for write data
Posted /CAS by programmable additive latency for
better command and data bus efficiency
On-Die-Termination for better signal quality
/DQS can be disabled for single-ended
Data Strobe operation
Off-Chip Driver (OCD) impedance adjustment is not
supported
Zentel Electronics Corporation reserve the right to change products or specification without notice.
Revision 1.2
Page 1 / 71
Dec., 2012




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256Mb DDRII Synchronous DRAM - Zentel