UT8ER1M32M 32 Megabit SRAM MCM


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The UT8ER1M32, UT8ER2M32, and UT8ER4M32 are high performance CMOS static RAM multichip modules (MCMs) organized as two, four or eight individual 524,288 words x 32 bits dice respectively. Easy memory expansion is provided by active LOW chip enables (En), an active LOW output enable (G), and three-state drivers. This device has a power-down feature that reduces power consumption by more than 90% when deselected. Autonomous (master) and demanded (slave) scrubbing continues while deselected.  Writing to the device is accomplished by driving one of the chip enable (En) inputs LOW and the write enable (W) input LOW.  Data on the 32 I/O pins (DQ0 through DQ31) is then written into the location specified on the address pins (A0 through A18).  Reading from the device is accomplished by driving one of the chip enables (En) and output enable (G) LOW while driving write enable (W) HIGH. Under these conditions, the contents of the memory location specified by the address pins will appear on the I/O pins. Note: Only on En pin may be active at any time.  The 32 input/output pins (DQ0 through DQ31) are placed in a high impedance state when the device is deselected (En HIGH), the outputs are disabled (G HIGH), or during a write operation (En LOW, W LOW).


 20ns Read, 10ns Write maximum access times available
 Functionally compatible with traditional 1M, 2M and 4M x 32 SRAM devices
 CMOS compatible input and output levels, three-state bidirectional data bus
- I/O Voltages 2.3V to 3.6V, 1.7V to 2.0Vcore

Available densities:
- UT8ER1M32: 33, 554, 432 bits
- UT8ER2M32: 67, 108, 864 bits
- UT8ER4M32: 134, 217, 728 bits

Operational environment:
- Total-dose: 100 krad(Si)
- SEL Immune: <110 MeV-cm2/mg
- SEU error rate = 8.1 x10-16 errors/bit-day assuming geosynchronous orbit, Adam’s 90% worst environment, and 6600ns default Scrub Rate Period (=97% SRAM availability)

Packaging option:
- 132-lead side-brazed dual cavity ceramic quad flatpack

Standard Microelectronics Drawing:
- UT8ER1M32: 5962-10202 QML Q, Q+ and V compliant
- UT8ER2M32: 5962-10203 QML Q, Q+, and V compliant
- UT8ER4M32: 5962-10204 QML Q and Q+ compliant



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