IS43R32400D-5BL ISSI, Integrated Silicon Solution Inc, IS43R32400D-5BL Datasheet - Page 58

• Manufacturer Part Number: IS43R32400D-5BL
• Manufacturer: ISSI, Integrated Silicon Solution Inc
• Type: DDR SDRAMr

Specifications of IS43R32400D-5BL

• Organization: 4Mx32
• Density: 128Mb
• Address Bus: 14b
• Access Time (max): 700ps
• Maximum Clock Rate: 200MHz
• Operating Supply Voltage (typ): 2.6V
• Operating Temp Range: 0C to 70C
• Operating Supply Voltage (max): 2.7V
• Operating Supply Voltage (min): 2.5V
• Supply Current: 185mA
• Pin Count: 144
• Mounting: Surface Mount
• Operating Temperature Classification: Commercial
• Lead Free Status / RoHS Status: Compliant

IS43R32400D, IS43R16800D
POWER-DOWN
Power-down is entered when CKE is registered Low (no accesses can be in progress). If power-down occurs when all
banks are idle, this mode is referred to as precharge power-down; if power-down occurs when there is a row active in
any bank, this mode is referred to as active power-down.
For maximum power savings, the user has the option of disabling the DLL prior to entering power--down. In that case,
the DLL must be enabled after exiting power--down, and 200 clock cycles must occur before a READ command
can be issued. However, power--down duration is limited by the refresh requirements of the device, so in most
applications, the self--refresh mode is preferred over the DLL--disabled power--down mode.
Entering power-down deactivates the input and output buffers, excluding CK, CK and CKE. In power-down mode, CKE
LOW must be maintained, and all other input signals are “Don’t Care”. The minimum power-down duration is specified
by tCKE. However, power-down duration is limited by the refresh requirements of the device.
The power-down state is synchronously exited when CKE is registered High (along with a NOP or DESELECT
command). A valid command may be applied tXP after exit from power-down.
Power-Down Entry and Exit
Notes:
No column accesses are allowed to be in progress at the time Power--Down is entered
* = If this command is a PRECHARGE ALL (or if the device is already in the idle state) then the Power--Down mode
shown is Precharge Power Down. If this command is an ACTIVE (or if at least one row is already active) then the
Power--Down mode shown is Active Power Down.
Integrated Silicon Solution, Inc.
58
Rev. 00D
06/22/09