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Details, datasheet, quote on part number:PDM31564SA12SOA
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Datasheet text preview:
PRELIMINARY
PDM31564 PDM31564
256K x 16 CMOS 3.3V Static RAM
Features
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Description
The PDM31564 is a high-performance CMOS static RAM organized as 262,144 x 16 bits. The PDM31564 features low power dissipation using chip enable (CE) and has an output enable input (OE) for fast memory access. Byte access is supported by upper and lower byte controls. The PDM31564 operates from a single 3.3V power supply and all inputs and outputs are fully TTLcompatible. The PDM31564 is available in a 44-pin 400-mil plastic SOJ and a plastic TSOP package for high-density surface assembly and is suitable for use in highspeed applications requiring high-speed storage.
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High-speed access times - Com'l: 8, 10, 12, 15, and 20 ns - Ind: 12, 15, and 20 ns Low power operation (typical) - PDM31564SA Active: 300 mW Standby: 25mW High-density 256K x 16 architecture 3.3V (±0.3V) power supply Fully static operation TTL-compatible inputs and outputs Output buffer controls: OE Data byte controls: LB, UB Packages: Plastic SOJ (400 mil) - SO Plastic TSOP (II) - T
Functional Block Diagram
Row Address Buffer Row Decoder Vcc Vss
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Memory C A ell 2 rray 56 x 256 x 512x 128 x 32
A8 - A0 A7-A0
8 9 10 11
I/O15-I/O0
IData O put/ n Butput uffer
Sense Amp
D olumn C ecoder WE OE UB LB CE
Control L ogic G Clock enerator
A olumn C B dress d uffer
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A17-A8 A15 - A9
Rev. 1.2 - 3/31/98
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PRELIMINARY
PDM31564
Pin Configuration TSOP (II)
A4 A3 A2 A1 C0 IE I/O0 I/O1 I/O2 V3 /O Vcc I ss I/O4 I/O5 I/O6 /O7 W AE A17 A16 A15 A14 13 1 2 3 4 5 6 7 8 9 10 11 12 3 14 15 16 17 18 19 20 21 12 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 A5 A6 O7 UE LB IB I/O15 I/O14 I/O13 VO12 / Vss I cc I/O11 I/O10 I/O9 NO8 / AC A8 A9 A10 A11 12 A4 A3 A2 A1 C0 IE I/O0 I/O1 I/O2 V3 /O Vcc I ss I/O4 I/O5 I/O6 /O7 W AE A17 A16 A15 A14 13 1 2 3 4 5 6 7 8 9 10 11 12 3 14 15 16 17 18 19 20 21 12
SOJ
44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 A5 A6 O7 UE LB IB I/O15 I/O14 I/O13 VO12 / Vss I cc I/O11 I/O10 I/O9 NO8 / AC A8 A9 A10 A11 12
Pin Description
Name A17-A0 I/O15-I/O0 CE WE OE LB, UB NC Vss VCC Description Address Inputs Data Inputs Chip Enable Input Write Enable Input Output Enable Input Data Byte Control Inputs No Connect Ground Power (+3.3V)
Capacitance (TA = +25°C, f = 1.0 MHz)
Symbol CIN CI/O Parameter Input Capacitance Output Capacitance Conditions VIN = VSS VI/O = VSS Max. 6 8 Unit pF pF
NOTE: This parameter is determined by device characterization, but is not production tested.
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Rev. 1.2 - 3/31/98
PRELIMINARY
PDM31564
Operating Mode
Mode Read CE L OE L WE H LB L H L Write L X L L H L Output Disable L L Standby H H X X H X X X H X UB L L H L L H x H X I/O7-I/O0 Output High Impedance Output Input High Impedance Input High Impedance High Impedance High Impedance I/O15-I/O8 Output Output High Impedance Input Input High Impedance High Impedance High Impedance High Impedance Power ICC ICC ICC ICC ICC ICC ICC ICC ISB
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NOTE: H = VIH, L = VIL, X = DON'T CARE
Absolute Maximum Ratings (1)
Symbol VTERM TBIAS TSTG PT IOUT Tj Rating Terminal Voltage with Respect to VSS Temperature Under Bias Storage Temperature Power Dissipation DC Output Current Maximum Junction Temperature
(2)
Com'l. 0.5 to +4.6 55 to +125 55 to +125 1.5 50 125
Ind. 0.5 to +4.6 65 to +135 65 to +150 1.5 50 145
Unit V °C °C W mA °C
NOTE: 1. Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability. 2. Appropriate thermal calculations should be performed in all cases and specifically for those where the chosen package has a large thermal resistance (e.g., TSOP). The calculation should be of the form: Tj = Ta + P * ja where Ta is the ambient temperature, P is average operating power and ja the thermal resistance of the package. For this product, use the following ja values: SOJ: 59o C/W TSOP: 87o C/W
Recommended DC Operating Conditions
Symbol VCC VSS Industrial Commercial Description Supply Voltage Supply Voltage Ambient Temperature Ambient Temperature Min. 3.0 0 40 0 Typ. 3.3 0 25 25 Max. 3.6 0 85 70 Unit V V °C °C
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Rev. 1.2 - 3/31/98
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