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HYM328020S-60 Datasheet(PDF) 9 Page - Siemens Semiconductor Group

Part # HYM328020S-60
Description  8M x 32-Bit Dynamic RAM Module
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Manufacturer  SIEMENS [Siemens Semiconductor Group]
Direct Link  http://www.siemens.com/
Logo SIEMENS - Siemens Semiconductor Group

HYM328020S-60 Datasheet(HTML) 9 Page - Siemens Semiconductor Group

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Semiconductor Group
9
HYM 328020S/GS-50/-60
8M
× 32-Bit
Notes:
1) All voltages are referenced to VSS.
2) ICC1, ICC3, ICC4 and ICC6 depend on cycle rate.
3) ICC1 and ICC4 depend on output loading. Specified values are measured with the output open.
4) Address can be changed once or less while RAS = VIL. In the case of ICC4 it can be changed once or less
during a fast page mode cycle (tPC).
5) An initial pause of 200
µs is required after power-up followed by 8 RAS cycles of which at least one cycle has
to be a refresh cycle, before proper device operation is achieved. In case of using internal refresh counter, a
minimum of 8 CAS-before-RAS initialization cycles instead of 8 RAS cycles are required.
6) AC measurements assume tT = 5 ns.
7) VIH (min.) and VIL (max.) are reference levels for measuring timing of input signals. Transition times are also
measured between VIH and VIL.
8) Measured with a load equivalent to 2 TTL loads and 100 pF.
9) Operation within the tRCD (max.) limit ensures that tRAC (max.) can be met. tRCD (max.) is specified as a
reference point only: If tRCD is greater than the specified tRCD (max.) limit, then access time is controlled by
tCAC.
10)Operation within the tRAD (max.) limit ensures that tRAC (max.) can be met. tRAD (max.) is specified as a
reference point only: If tRAD is greater than the specified tRAD (max.) limit, then access time is controlled by
tAA.
11)Either tRCH or tRRH must be satisfied for a read cycle.
12)tOFF (max.) define the time at which the outputs achieve the open-circuit condition and are not referenced to
output voltage levels
.
13)tWCS is not a restrictive operating parameter. This is included in the data sheet as electrical characteristics
only. If tWCS > tWCS (min.), the cycle is an early write cycle and the I/O pin will remain open-circuit (high
impedance) through the entire cycle.
14)These parameters are referenced to the CAS leading edge.


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