scope:

This drawing documents five product assurance classes, class D (lowest reliability), class E, (exceptions), class G (lowest high reliability), class H (high reliability), and class K, (highest reliability) and a choice of case outlines and lead finishes are available and are reflected in the Part or Identifying Number (PIN). When available, a choice of radiation hardness assurance levels are reflected in the PIN.

The PIN shall be as shown in the following example:

Device classes H and K RHA marked devices shall meet the MIL-PRF-38534 specified RHA levels and shall be marked with the appropriate RHA designator. A dash (-) indicates a non-RHA device.

The device type(s) shall identify the circuit function as follows:

Device type Generic number Circuit function Access time 01 WS256K8-120CQ SRAM, 256K × 8-bit 120 ns 02 WS256K8-100CQ SRAM, 256K × 8-bit 100 ns 03 WS256K8-85CQ SRAM, 256K × 8-bit 85 ns 04 WS256K8-70CQ SRAM, 256K × 8-bit 70 ns 05 WS256K8-55CQ SRAM, 256K × 8-bit 55 ns 06 WS256K8-45CQ SRAM, 256K × 8-bit 45 ns 07 WS256K8-35CQ SRAM, 256K × 8-bit 35 ns 08 WS256K8-25CQ SRAM, 256K × 8-bit 25 ns 09 WS265K8-20CQ SRAM, 256K × 8-bit 20 ns

This device class designator shall be a single letter identifying the product assurance level as follows:

Device class Device requirements documentation H or K Certification and qualification to MIL-PRF-38534

The case outline(s) shall be as designated in MIL-STD-1835 and as follows:

Outline letter Descriptive designator Terminals Package style X See figure 1 32 Dual-in-line, dual cavity Y See figure 1 32 Dual-in-line, single cavity

The lead finish shall be as specified in MIL-PRF-38534.

Supply voltage range (V_CC) .............................. −05 V dc to +7.0 V dc Signal voltage range (any pin) .......................... −05 V dc to +7.0 V dc Power dissipation (P_D) .................................. 1 W Storage temperature range ............................... −65°C to +150°C Lead temperature (soldering, 10 seconds) ................ +300°C

Supply voltage range (V_CC) .............................. +4.5 V dc to +5.5 V dc Input low voltage range (V_IL) ........................... −0.5 dc to +0.8 V dc Input high voltage range (V_IH) .......................... +2.2 V dc to V_CC +0.3 V dc Output low voltage, maximum (V_OL) ....................... +0.4 V dc Output high voltage, minimum (V_OH) ...................... +2.4 V dc Case operating temperature range (T_C) ................... −55°C to +125°C

intended Use:

Microcircuits conforming to this drawing are intended for use for Government microcircuit applications (original equipment), design applications, and logistics purposes.