![](http://datasheet.mmic.net.cn/180000/GS8342TT06BGD-500T_datasheet_11302052/GS8342TT06BGD-500T_1.png)
36Mb SigmaDDRTM-II+
Burst of 2 SRAM
550 MHz–350 MHz
1.8 V VDD
1.8 V or 1.5 V I/O
165-Bump BGA
Commercial Temp
Industrial Temp
Rev: 1.00 5/2011
1/30
2011, GSI Technology
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
Preliminary
GS8342TT06/11/20/38BD-550/500/450/400/350
Features
2.5 Clock Latency
Simultaneous Read and Write SigmaDDRTM Interface
JEDEC-standard pinout and package
Double Data Rate interface
Byte Write controls sampled at data-in time
Burst of 2 Read and Write
Dual-Range On-Die Termination (ODT) on Data (D), Byte
Write (BW), and Clock (K, K) inputs
1.8 V +100/–100 mV core power supply
1.5 V or 1.8 V HSTL Interface
Pipelined read operation
Fully coherent read and write pipelines
ZQ pin for programmable output drive strength
Data Valid Pin (QVLD) Support
IEEE 1149.1 JTAG-compliant Boundary Scan
165-bump, 13 mm x 15 mm, 1 mm bump pitch BGA package
RoHS-compliant 165-bump BGA package available
SigmaDDR-II Family Overview
The GS8342TT06/11/20/38BD are built in compliance with
the SigmaDDR-II+ SRAM pinout standard for Common I/O
synchronous SRAMs. They are 37,748,736-bit (36Mb)
SRAMs. The GS8342TT06/11/20/38BD SigmaDDR-II+
SRAMs are just one element in a family of low power, low
voltage HSTL I/O SRAMs designed to operate at the speeds
needed to implement economical high performance
networking systems.
Clocking and Addressing Schemes
The GS8342TT06/11/20/38BD SigmaDDR-II+ SRAMs are
synchronous devices. They employ two input register clock
inputs, K and K. K and K are independent single-ended clock
inputs, not differential inputs to a single differential clock input
buffer.
Because Common I/O SigmaDDR-II+
RAMs always transfer
data in two packets, A0 is internally set to 0 for the first read
or write transfer, and automatically incremented by 1 for the
next transfer. Because the LSB is tied off internally, the
address field of a SigmaDDR-II+ B2
RAM is always one
address pin less than the advertised index depth force return
(e.g., the 2M x 18 has a 1M addressable index).
Parameter Synopsis
-550
-500
-450
-400
-350
tKHKH
1.81 ns
2.0 ns
2.2 ns
2.5 ns
2.86 ns
tKHQV
0.45 ns