M68AW031AM70MS1F datasheet, PDF

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M68AW031AM70MS1F: Description32KX8 STANDARD SRAM, 70ns, PDSO28, 0.330 INCH, LEAD FREE, PLASTIC, SO-28; Categorystorage storage; File Size399KB，21 Pages; ManufacturerSTMicroelectronics; Websitehttp://www.st.com/; Environmental Compliance

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M68AW031AM70MS1F Overview

32KX8 STANDARD SRAM, 70ns, PDSO28, 0.330 INCH, LEAD FREE, PLASTIC, SO-28

M68AW031AM70MS1F Parametric

Parameter Name	Attribute value
Is it Rohs certified?	conform to
Maker	STMicroelectronics
Parts packaging code	SOIC
package instruction	0.330 INCH, LEAD FREE, PLASTIC, SO-28
Contacts	28
Reach Compliance Code	compliant
ECCN code	EAR99
Maximum access time	70 ns
I/O type	COMMON
JESD-30 code	R-PDSO-G28
length	18.11 mm
memory density	262144 bit
Memory IC Type	STANDARD SRAM
memory width	8
Number of functions	1
Number of terminals	28
word count	32768 words
character code	32000
Operating mode	ASYNCHRONOUS
Maximum operating temperature	70 °C
Minimum operating temperature
organize	32KX8
Output characteristics	3-STATE
Package body material	PLASTIC/EPOXY
encapsulated code	SOP
Encapsulate equivalent code	SOP28,.5
Package shape	RECTANGULAR
Package form	SMALL OUTLINE
Parallel/Serial	PARALLEL
Peak Reflow Temperature (Celsius)	260
power supply	3/3.3 V
Certification status	Not Qualified
Maximum seat height	2.85 mm
Maximum standby current	0.000006 A
Minimum standby current	1.5 V
Maximum slew rate	0.03 mA
Maximum supply voltage (Vsup)	3.6 V
Minimum supply voltage (Vsup)	2.7 V
Nominal supply voltage (Vsup)	3 V
surface mount	YES
technology	CMOS
Temperature level	COMMERCIAL
Terminal form	GULL WING
Terminal pitch	1.27 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	30
width	8.407 mm

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M68AW031A

256 Kbit (32K x8) 3.0V Asynchronous SRAM

FEATURES SUMMARY

■

SUPPLY VOLTAGE: 2.7 to 3.6V

32K x 8 bits SRAM with OUTPUT ENABLE

EQUAL CYCLE and ACCESS TIME: 55ns,

70ns

LOW STANDBY CURRENT

LOW V

DATA RETENTION: 1.5V

TRI-STATE COMMON I/O

AUTOMATIC POWER DOWN

Figure 1. Packages

SO28 (MS)

330m

-O

TSOP28 (N)

8 x 13.4 mm

TSOP28 Reverse (NS)

8 x 13.4 mm

October 2004

1/21

M68AW031A

TABLE OF CONTENTS

FEATURES SUMMARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Figure 1. Packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

SUMMARY DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Figure 2.

Table 1.

Figure 3.

Figure 4.

Figure 5.

Figure 6.

Logic Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Signal Names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

SO Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

TSOP Connections (Reverse) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

TSOP Connections (Normal) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Read Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Write Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Table 2. Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

MAXIMUM RATING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Table 3. Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

DC AND AC PARAMETERS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Table 4. Operating and AC Measurement Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Figure 7. AC Measurement I/O Waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Figure 8. AC Measurement Load Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Table 5. Capacitance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Table 6. DC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Figure 9. Address Controlled, Read Mode AC Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Figure 10.Chip Enable or Output Enable Controlled, Read Mode AC Waveforms. . . . . . . . . . . . . 11

Figure 11.Chip Enable Controlled, Standby Mode AC Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . 11

Table 7. Read and Standby Mode AC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Figure 12.Write Enable Controlled, Write AC Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Figure 13.Chip Enable Controlled, Write AC Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Table 8. Write Mode AC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Figure 14.Low V

Data Retention AC Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Table 9. Low V

Data Retention Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

PACKAGE MECHANICAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Figure 15.SO28 - 28 lead Plastic Small Outline, 330 mils body width, Package Outline . . . . . . . . 16

Table 10. SO28 - 28 lead Plastic Small Outline, 330 mils body width, Package Mechanical Data . 16

Figure 16.TSOP28 - 28 Lead Normal Pinout Plastic Small Outline, Package Outline . . . . . . . . . . 17

Table 11. TSOP28 - 28 lead Normal Pinout Plastic Small Outline, Package Mechanical Data . . . 17

Figure 17.TSOP28 - 28 Lead Reverse Pinout Plastic Small Outline, Package Outline . . . . . . . . . 18

Table 12. TSOP28 - 28 lead Reverse Pinout Plastic Small Outline, Package Mechanical Data. . . 18

-O

2/21

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