advanced high-speed CMOS static Commercial 70°C) Industrial (-40° 85°C

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advanced high-speed CMOS static Commercial 70°C) Industrial (-40° 85°C

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IDT71256SA
advanced high-speed CMOS static Commercial 70°C) Industrial (-40° 85°C) temperature options Equal access cycle times Commercial: 12/15/20/25ns Industrial: 15/20ns Chip Select plus Output Enable Bidirectional data inputs outputs directly TTL-compatible power consumption chip deselect Commercial product available 28-pin 300- 600-mil Plastic DIP, Plastic TSOP packages Industrial product available 28-pin Plastic TSOP packages
DESCRIPTION:
ID71256SA 262,144-bit high-speed Static organized fabricated using IDT's highperfomance, high-reliability CMOS technology. This state-ofthe-art technology, combined with innovative circuit design techniques, provides cost-effective solution high-speed memory needs. IDT71256SA output enable which operates fast 6ns, with address access times fast 12ns. bidirectional inputs outputs IDT71256SA TTLcompatible operation from single supply. Fully static asynchronous circuitry used, requiring clocks refresh operation. IDT71256SA packaged 28-pin 300- 600-mil Plastic DIP, 28-pin Plastic TSOP.
FUNCTIONAL BLOCK DIAGRAM
ADDRESS DECODER 262,144-BIT MEMORY ARRAY
CONTROL
2948
CONTROL LOGIC
logo registered trademark
INDUSTRIAL COMMERCIAL TEMPERATURE RANGES
©1999
1999
DSC-2948/05
IDT71256SA
INDUSTRIAL COMMERCIAL TEMPERATURE RANGES
CONFIGURATIONS
I/O0 I/O1 I/O2
ABSOLUTE MAXIMUM RATINGS(1)
I/O7 I/O6 I/O5 I/O4 I/O3
2948
Symbol VTERM TBIAS TSTG IOUT
Rating Supply Voltage Relative Terminal Voltage Relative Temperature Under Bias Storage Temperature Power Dissipation Output Current
Value -0.5 +7.0 -0.5 VCC+0.5 +125 +125
Unit
SO28-5 P28-2 P28-1
DIP/SOJ VIEW
NOTES: 2948 Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS cause permanent damage device. This stress rating only functional operation device these other conditions above those indicated operational sections this specification implied. Exposure absolute maximum rating conditions extended periods affect reliability.
SO28-8
2948
TRUTH TABLE(1,2)
DATAOUT DATAIN High-Z High-Z High-Z
Function Read Data Write Data Outputs Disabled Deselected Standby (ISB) Deselected Standby (ISB1)
2948
VHC(3)
TSOP VIEW
NOTES: VIH, VIL, Don't care. 0.2V, -0.2V. Other inputs VLC.
RECOMMENDED OPERATING CONDITIONS RECOMMENDED OPERATING TEMPERATURE SUPPLY VOLTAGE
Grade Commercial Industrial Temperature +70°C -40°C +85°C 4.5V 5.5V 4.5V 5.5V
3948
Symbol
Parameter Supply Voltage Supply Voltage Input High Voltage Input Voltage
Min. -0.5
Typ.
Max. VCC+0.5
Unit
NOTE: 2948 (min.) -1.5V pulse width less than 10ns, once cycle.
ELECTRICAL CHARACTERISTICS
5.0V
IDT71256SA Symbol |ILI| |ILO| Parameter Input Leakage Current Output Leakage Current Output Voltage Output High Voltage Test Condition Max., Max., VIH, VOUT 8mA, Min. -4mA, Min. Min. Max. Unit
2948
IDT71256SA
INDUSTRIAL COMMERCIAL TEMPERATURE RANGES
ELECTRICAL CHARACTERISTICS(1)
(VCC 5.0V 10%, 0.2V, VCC-0.2V)
Symbol ISB1 Parameter Dynamic Operating Current VIL, Outputs Open, Max., fMAX Standby Power Supply Current (TTL Level) VIH, Outputs Open, Max., fMAX Standby Power Supply Current (CMOS Level) VHC, Outputs Open, Max., 71256SA12(3) 71256SA15 71256SA20 71256SA25(3) Unit
NOTES: values maximum guaranteed values. fMAX 1/tRC (all address inputs cycling fMAX); means address input lines changing Commercial temperature range only.
2948
TEST CONDITIONS
Input Pulse Levels Input Rise/Fall Times Input Timing Reference Levels Output Reference Levels Test Load 3.0V 1.5V 1.5V Figures
2948
CAPACITANCE
+25°C, 1.0MHz, package)
Symbol CI/O Parameter(1) Input Capacitance Capacitance Conditions VOUT Max. Unit
NOTE: 2948 This parameter guaranteed device characterization, production tested.
DATAOUT 30pF*
2948
DATA 5pF*
2948
*Including scope capacitance.
Figure Test Load
Figure Test Load (for tCLZ, tOLZ, tCHZ, tOHZ, tOW, tWHZ)
IDT71256SA
INDUSTRIAL COMMERCIAL TEMPERATURE RANGES
ELECTRICAL CHARACTERISTICS (VCC 5.0V 10%)
71256SA12(2) Symbol Read Cycle tACS tCLZ(1) tCHZ(1) tOLZ(1) tOHZ(1) tPU(1) tPD(1) tOW(1) tWHZ(1) Read Cycle Time Address Access Time Chip Select Access Time Chip Select Output Low-Z Chip Deselect Output High-Z Output Enable Output Valid Output Enable Output Low-Z Output Disable Output High-Z Output Hold from Address Change Chip Select Power Time Chip Deselect Power Down Time Write Cycle Time Address Valid Write Chip Select Write Address Set-up Time Write Pulse Width Write Recovery Time Data Valid Write Data Hold Time Output Active from Write Write Enable Output High-Z
2948
71256SA15 Min. Max.
71256SA20 Min. Max.
71256SA25(2) Min. Max.
Parameter
Min.
Max.
Write Cycle
NOTE: This parameter guaranteed with Load (Figure device characterization, production tested. Commercial temperature range only.
TIMING WAVEFORM READ CYCLE 1(1)
ADDRESS tOLZ
tACS tCLZ DATAOUT
tOHZ tCHZ
HIGH IMPEDANCE
DATA VALID
SUPPLY CURRENT
2948
IDT71256SA
INDUSTRIAL COMMERCIAL TEMPERATURE RANGES
TIMING WAVEFORM READ CYCLE 2(1,2,4)
ADDRESS DATAOUT PREVIOUS DATAOUT VALID DATAOUT VALID
2948
NOTES: HIGH Read Cycle. Device continuously selected, LOW. Address must valid prior coincident with later transition LOW; otherwise limiting parameter. LOW. Transition measured ±200mV from steady state.
TIMING WAVEFORM WRITE CYCLE NO.1 CONTROLLED TIMING)(1,2,3,5)
ADDRESS tWHZ DATAOUT
HIGH IMPEDANCE
tCHZ
DATAIN
DATAIN VALID
2948
TIMING WAVEFORM WRITE CYCLE NO.2 CONTROLLED TIMING)(1,2,5)
ADDRESS DATAIN DATAIN VALID
2948
NOTES: must HIGH during address transitions. write occurs during overlap continuously HIGH. during controlled write cycle LOW, must greater than equal tWHZ allow drivers turn data placed required tDW. HIGH during controlled write cycle, this requirement does apply minimum write pulse short specified tWP. During this period, pins output state, input signals must applied. transition occurs simultaneously with after transition, outputs remain high-impedance state. Transition measured ±200mV from steady state.
IDT71256SA
INDUSTRIAL COMMERCIAL TEMPERATURE RANGES
ORDERING INFORMATION COMMERCIAL
71256 Device Type Power Speed Package Process/ Temperature Range
Blank
Commercial (0°C +70°C)
600-mil Plastic (P28-1) (25ns speed only) 300-mil Plastic (P28-2) 300-mil (SO28-5) TSOP Type (SO28-8)
Speed nanoseconds
2948
ORDERING INFORMATION INDUSTRIAL
71256 Device Type Power Speed Package Process/ Temperature Range
Industrial (-40°C +85°C)
300-mil (SO28-5) TSOP Type (SO28-8)
Speed nanoseconds
2948

advanced high-speed CMOS static Commercial 70°C) Industrial (-40° 85°C

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