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 Industrial: 12/15/20/25ns 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
IDT71256SA 262,144-bit high-speed Static organized fabricated using IDT's high-perfomance, high-reliability CMOS technology. This state-of-the-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 TTL-compatible 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
I/O0 I/O7
CONTROL
2948
CONTROL LOGIC
FEBRUARY 2001
©2000 Integrated Device Technology, Inc. DSC-2948/07
IDT71256SA
Commercial Industrial Temperature Ranges
Configurations
I/O0 I/O1 I/O2
Absolute Maximum Ratings(1)
Symbol 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
I/O7 I/O6 I/O5 I/O4 I/O3
2948
VTERM TBIAS TSTG IOUT
2948
DIP/SOJ View
NOTE: 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
I/O7 I/O6 I/O5 I/O4 I/O3 I/O2 I/O1 I/O0
Truth Table(1,2)
DATAOUT DATAIN High-Z High-Z High-Z Function Read Data Write Data Outputs Disabled Deselected Standby (ISB) Deselecte Standby (ISB1)
2948
VHC(3)
2948
TSOP View
NOTES: VIH, VIL, Don't care. 0.2V, -0.2V. Other inputs VLC.
Recommended Operating Temperature Supply Voltage
Grade Commercial Industrial Temperature +70OC -40OC +85OC 4.5V 5.5V 4.5V 5.5V
2948
Recommended Operating Conditions
Symbol Parameter Supply Voltage Ground Input High Voltage Input Voltage Min. -0.5(1) Typ.
Max. +0.5
Unit
2948
NOTE: (min.) -1.5V pulse width less than 10ns, once cycle.
IDT71256SA
Commercial Industrial Temperature Ranges
Electrical Characteristics
(VCC 5.0V 10%)
Symbol |ILI| |ILO| IDT71256SA Parameter Input Leakage Current Output Leakage Current Output Voltage Output High Voltage Test Conditions Max., Max., VIH, VOUT 8mA, Min. -4mA, Min. Min.
Max.
Unit
2948
Electrical Characteristics(1)
Symbol ISB1 Parameter Dynamic Operating Current VIL, Outputs Open, Max., fMAX(2) Standby Power Supply Current (TTL Level) VIH, Outputs Open, Max., fMAX(2) Standby Power Supply Current (CMOS Level) VHC, Outputs Open, Max., 0(2),
(VCC 5.0V 10%, 0.2V, VCC0.2V)
71256SA12 71256SA15 71256SA20 71256SA25 Unit
NOTES: values maximum guaranteed values. fMAX 1/tRC (all address inputs cycling fMAX); means address input lines changing.
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
+25°C, 1.0MHz, package)
Symbol CI/O Parameter(1) Input Capacitance Capacitance Conditions VOUT Max. Unit
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Capacitance
NOTE: This parameter guaranteed device characterization, production tested.
DATA 30pF*
2948
DATA 5pF*
6.42
2948
Figure Test Load *Including scope capacitance.
Figure Test Load (for tCLZ, tOLZ, tCHZ, tOHZ, tOW, tWHZ)
IDT71256SA
Commercial Industrial Temperature Ranges
Electrical Characteristics
Symbol Parameter
(VCC 5.0V 10%)
71256SA12 Min. Max. 71256SA15 Min. Max. 71256SA20 Min. Max. 71256SA25 Min. Max. Unit
Read Cycle
tACS tCLZ(1) tCHZ(1) tOLZ(1) tOHZ(1) tPU(1) tPD(1) Read Cycle Time Address Access Time Chip Select Access Time Chip Select Output Low-Z Chip Sele Output High-Z Output Enable Output Valid Output Enab Output Low-Z Output Disab Output High-Z Output Hold from Address Change Chip Sele Power Time Chip Deselect Power Down Time
Write Cycle
tOW(1) tWHZ(1) Write Cycle Time Address Valid End-of-Write Chip Select End-of-Write Address Set-up Time Write Pulse Width Write Recovery Time Data Valid End-of-Write Data Hold Time Output Active from End-of-Write Write Enab Output High-Z
2948
NOTE: This parameter guaranteed with Load (Figure device characterization, production tested.
IDT71256SA
Commercial Industrial Temperature Ranges
Timing Waveform Read Cycle 1(1)
ADDRESS tOLZ
tACS tCLZ DATAOUT
tOHZ tCHZ
HIGH IMPEDANCE
DATA VALID
SUPPLY CURRENT
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Timing Waveform Read Cycle 2(1,2,4)
ADDRESS DATAOUT PREVIOUS DATAOUT VALID DATAOUT VALID
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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.
6.42
IDT71256SA
Commercial Industrial Temperature Ranges
Timing Waveform Write Cycle Controlled Timing)(1,2,4)
ADDRESS tWHZ DATAOUT
HIGH IMPEDANCE
tCHZ
DATAIN
DATAIN VALID
2948
Timing Waveform Write Cycle Controlled Timing)(1,4)
ADDRESS DATAIN DATAIN VALID
2948
NOTES: 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
Commercial Industrial 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) only 25ns available 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
6.42
IDT71256SA
Commercial Industrial Temperature Ranges
Datasheet Document History
1/7/00 08/09/00 02/01/01 Updated format Revised Industrial Temperature range offerings Removed Note Write Cycle diagrams, renumbered footnotes notes Added Datasheet Document History recommended designs Removed "Not recommended designs"
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advanced high-speed CMOS static Commercial 70°C) Industrial (-40° 85°C

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