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71V256SA Datasheet Download - IDT

Номер произв 71V256SA
Описание IDT71V256SA
Производители IDT
логотип IDT логотип 


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71V256SA Даташит, Описание, Даташиты
Integrated Device Technology, Inc.
LOW POWER
3.3V CMOS FAST SRAM
256K (32K x 8-BIT)
IDT71V256SA
FEATURES
• Ideal for high-performance processor secondary cache
• Commercial (0° to 70°C) and Industrial (-40° to 85°C)
temperature options
• Fast access times:
— Commercial: 10/12/15/20ns
— Industrial: 15ns
• Low standby current (maximum):
— 2mA full standby
• Small packages for space-efficient layouts:
— 28-pin 300 mil SOJ
— 28-pin 300 mil plastic DIP (Commercial only)
— 28-pin TSOP Type I
• Produced with advanced high-performance CMOS
technology
• Inputs and outputs are LVTTL-compatible
• Single 3.3V(±0.3V) power supply
DESCRIPTION
The IDT71V256SA is a 262,144-bit high-speed static RAM
organized as 32K x 8. It is fabricated using IDT’s high-
performance, high-reliability CMOS technology.
The IDT71V256SA has outstanding low power character-
istics while at the same time maintaining very high perfor-
mance. Address access times of as fast as10 ns are ideal for
3.3V secondary cache in 3.3V desktop designs.
When power management logic puts the IDT71V256SA in
standby mode, its very low power characteristics contribute to
extended battery life. By taking CS HIGH, the SRAM will
automatically go to a low power standby mode and will remain
in standby as long as CS remains HIGH. Furthermore, under
full standby mode (CS at CMOS level, f=0), power consump-
tion is guaranteed to always be less than 6.6mW and typically
will be much smaller.
The IDT71V256SA is packaged in 28-pin 300 mil SOJ, 28-
pin 300 mil plastic DIP, and 28-pin 300 mil TSOP Type I
packaging.
FUNCTIONAL BLOCK DIAGRAM
A0
ADDRESS
DECODER
A14
I/O0
INPUT
DATA
CIRCUIT
I/O7
CS
OE CONTROL
WE CIRCUIT
262,144 BIT
MEMORY ARRAY
I/O CONTROL
VCC
GND
3101 drw 01
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL AND COMMERCIAL TEMPERATURE RANGES
©1997 Integrated Device Technology, Inc.
MAY 1997
DSC-3101/04
1
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71V256SA Даташит, Описание, Даташиты
IDT71V256SA
3.3V CMOS STATIC RAM 256K (32K x 8-BIT)
INDUSTRIAL AND COMMERCIAL TEMPERATURE RANGES
PIN CONFIGURATIONS
ABSOLUTE MAXIMUM RATINGS(1)
A14
A12
A7
A6
A5
A4
A3
A2
A1
A0
I/O0
I/O1
I/O2
GND
1 28
2 27
3 26
4 25
5 24
6 23
7 SO28-5 22
P28-2
8 21
9 20
10 19
11 18
12 17
13 16
14 15
DIP/SOJ
TOP VIEW
VCC
WE
A13
A8
A9
A11
OE
A10
CS
I/O7
I/O6
I/O5
I/O4
I/O3
3101 drw 02
OE
A 11
A9
A8
A 13
WE
V CC
A 14
A 12
A7
A6
A5
A4
A3
22
23
24
25
26
27
28
1
2
3
4
5
6
7
SO28-8
TSOP
TOP VIEW
21 A 10
20 CS
19 I/O7
18 I/O6
17 I/O5
16 I/O4
15 I/O3
14 GND
13 I/O2
12 I/O1
11 I/O0
10 A 0
9 A1
8 A2
3101 drw 11
Symbol
Rating
Value
Unit
VCC
VTERM(2)
Supply Voltage
Relative to GND
Terminal Voltage
Relative to GND
–0.5 to +4.6
V
–0.5 to VCC+0.5 V
TBIAS
Temperature Under Bias –55 to +125
°C
TSTG
Storage Temperature
–55 to +125
°C
PT Power Dissipation
1.0 W
IOUT
DC Output Current
50 mA
NOTES:
3101 tbl 03
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. Input, Output, and I/O terminals; 4.6V maximum.
CAPACITANCE
(TA = +25°C, f = 1.0MHz, SOJ package)
Symbol
Parameter(1)
Conditions Max. Unit
CIN Input Capacitance
VIN = 3dV
6 pF
COUT Output Capacitance VOUT = 3dV
7 pF
NOTE:
3101 tbl 04
1. This parameter is determined by device characterization, but is not
production tested.
PIN DESCRIPTIONS
Name
A0–A14
I/O0–I/O7
CS
WE
OE
GND
VCC
Description
Addresses
Data Input/Output
Chip Select
Write Enable
Output Enable
Ground
Power
TRUTH TABLE(1)
3101 tbl 01
I/OWE
CS
OE
X H X High-Z
X VHC X High-Z
H L H High-Z
H L L DOUT
L LX
NOTE:
1. H = VIH, L = VIL, X = Don’t Care
DIN
Function
Standby (ISB)
Standby (ISB1)
Output Disable
Read
Write
3101 tbl 02
RECOMMENDED OPERATING
TEMPERATURE AND SUPPLY VOLTAGE
Grade
Temperature
GND
VCC
Commercial
0°C to +70°C
0V 3.3V ± 0.3V
Industrial
-40°C to +85°C
0V 3.3V ± 0.3V
3101 tbl 05
RECOMMENDED DC OPERATING
CONDITIONS
Symbol
Parameter
Min. Typ. Max. Unit
VCC Supply Voltage
3.0 3.3 3.6 V
GND Supply Voltage
00
0V
VIH Input High Voltage - Inputs 2.0 — 5.0 V
VIH
Input High Voltage - I/O
2.0 — Vcc+0.3 V
VIL Input Low Voltage
–0.3(1)
0.8 V
NOTE:
3101 tbl 06
1. VIL (min.) = –2.0V for pulse width less than 5ns, once per cycle.
2
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71V256SA Даташит, Описание, Даташиты
IDT71V256SA
3.3V CMOS STATIC RAM 256K (32K x 8-BIT)
INDUSTRIAL AND COMMERCIAL TEMPERATURE RANGES
DC ELECTRICAL CHARACTERISTICS(1, 2)
(VCC = 3.3V ± 0.3V, VLC = 0.2V, VHC = VCC - 0.2V)
Symbol
Parameter
71V256SA10(3) 71V256SA12(3) 71V256SA15 71V256SA20(3) Unit
ICC Dynamic Operating Current CS VIL, Outputs
Open, VCC = Max., f = fMAX(2)
100
90 85 85 mA
ISB Standby Power Supply Current (TTL Level)
CS = VIH, VCC = Max., Outputs Open, f = fMAX(2)
20
20 20 20 mA
ISB1 Full Standby Power Supply Current (CMOS Level)
CS VHC, VCC = Max., Outputs Open, f = 0(2),
VIN VLC or VIN VHC
2
2 2 2 mA
NOTES:
1. All values are maximum guaranteed values.
2. fMAX = 1/tRC, only address inputs cycling at fmax; f = 0 means that no inputs are cycling.
3. Commercial temperature range only.
3101 tbl 07
DC ELECTRICAL CHARACTERISTICS
VCC = 3.3V± 0.3V
Symbol
|ILI|
|ILO|
VOL
VOH
Parameter
Input Leakage Current
Output Leakage Current
Output Low Voltage
Output High Voltage
Test Condition
VCC = Max., VIN = GND to VCC
VCC = Max., CS = VIH, VOUT = GND to VCC
IOL = 8mA, VCC = Min.
IOH = –4mA, VCC = Min.
IDT71V256SA
Min.
Typ. Max.
— —2
— —2
— — 0.4
2.4 — —
Unit
µA
µA
V
V
3101 tbl 08
AC TEST CONDITIONS
Input Pulse Levels
Input Rise/Fall Times
Input Timing Reference Levels
Output Reference Levels
AC Test Load
GND to 3.0V
3ns
1.5V
1.5V
See Figures 1 and 2
3101 tbl 09
DATAOUT
350
3.3V
320
30pF*
DATAOUT
350
3.3V
320
5pF*
3101 drw 04
3101 drw 05
Figure 1. AC Test Load
Figure 2. AC Test Load
(for tCLZ, tOLZ, tCHZ, tOHZ, tOW, tWHZ)
*Includes scope and jig capacitances
3
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