HM62W16258BLTT-7 HITACHI, HM62W16258BLTT-7 Datasheet

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HM62W16258BLTT-7

Manufacturer Part Number
HM62W16258BLTT-7
Description
4M SRAM (256-kword x 16-bit), 70 ns access time
Manufacturer
HITACHI
Datasheet
Description
The Hitachi HM62W16258B Series is 4-Mbit static RAM organized 262,144-word
Series has realized higher density, higher performance and low power consumption by employing Hi-CMOS
process technology. It offers low power standby power dissipation; therefore, it is suitable for battery backup
systems. It is packaged in standard 44-pin plastic TSOPII.
Features
• Single 3.3 V supply: 3.3 V ± 0.3 V
• Fast access time: 55 ns/70 ns (max)
• Power dissipation:
• Completely static memory.
• Equal access and cycle times
• Common data input and output.
• Battery backup operation.
Active: 9.9 mW (typ)
Standby: 3.3 µW (typ)
No clock or timing strobe required
Three state output
HM62W16258B Series
4 M SRAM (256-kword
16-bit)
16-bit. HM62W16258B
ADE-203-976B (Z)
Oct. 14, 1999
Rev. 2.0

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HM62W16258BLTT-7 Summary of contents

Page 1

... HM62W16258B Series 4 M SRAM (256-kword Description The Hitachi HM62W16258B Series is 4-Mbit static RAM organized 262,144-word Series has realized higher density, higher performance and low power consumption by employing Hi-CMOS process technology. It offers low power standby power dissipation; therefore suitable for battery backup systems ...

Page 2

... HM62W16258B Series Ordering Information Type No. Access time HM62W16258BLTT HM62W16258BLTT HM62W16258BLTT-5SL 55 ns HM62W16258BLTT-7SL Package 400-mil 44-pin plastic TSOPII (normal-bend type) (TTP-44DB) ...

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Pin Arrangement Pin Description Pin name Function A0 to A17 Address input I/O0 to I/O15 Data input/output CS Chip select WE Write enable OE Output enable LB Lower byte select UB Upper byte select V Power supply CC V Ground ...

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HM62W16258B Series Block Diagram LSB A4 A3 A15 A14 A16 A1 A2 A17 A0 MSB A13 I/O0 I/O15 • • • Memory matrix Row • • 2,048 x 2,048 decoder • Column I/O • ...

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Operation Table Note ...

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HM62W16258B Series DC Characteristics Parameter Symbol Min Input leakage current |I Output leakage current |I Operating current I Average HM62W16258B-5 I operating current HM62W16258B Standby current I Standby current I I Output high voltage V Output low voltage ...

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AC Characteristics ( + Test Conditions • Input pulse levels 0 • Input rise and fall time • Input timing reference levels: 1.4 V • Output timing reference ...

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HM62W16258B Series Write Cycle Parameter Write cycle time Address valid to end of write Chip selection to end of write Write pulse width LB, UB valid to end of write Address setup time Write recovery time Data to write time ...

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Timing Waveform Read Cycle Address CS LB High impedance Dout t RC Valid address ACS CLZ BLZ OLZ HM62W16258B ...

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HM62W16258B Series Write Cycle (1) (WE Clock) Address CS LB Din Dout Valid address WHZ * ...

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Write Cycle (2) (CS Clock Address CS LB Din Dout ) Valid address High impedance HM62W16258B Series ...

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HM62W16258B Series Write Cycle (3) (LB, UB Clock Address CS LB Din Dout Valid address High impedance 5 7 ...

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Low V Data Retention Characteristics ( + Parameter V for data retention CC Data retention current Chip deselect to data retention time Operation recovery time Notes: 1. This characteristic is guaranteed only for L-version, 10 ...

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HM62W16258B Series Low V Data Retention Timing Waveform (1) (CS Controlled CDR Data Retention Timing Waveform (2) (LB, UB Controlled) Low CDR V CC ...

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... Package Dimensions HM62W16258BLTT Series (TTP-44DB) 18.41 18.81 Max 44 1 0.80 0.30 0.10 0.13 0.25 0.05 1.005 Max 0.10 Dimension including the plating thickness Base material dimension 11.76 Hitachi Code JEDEC EIAJ Weight (reference value) HM62W16258B Series 0.80 0.20 0 – 5 0.50 0.10 TTP-44DB — ...

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... Design your application so that the product is used within the ranges guaranteed by Hitachi particularly for maximum rating, operating supply voltage range, heat radiation characteristics, installation conditions and other characteristics ...

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