(IDT70P248 / IDT70P258) VERY LOW POWER 1.8V 8K/4K x 16 DUAL-PORT STATIC RAM
VERY LOW POWER 1.8V 8K/4K x 16 DUAL-PORT STATIC RAM
Features
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IDT70P258/248L
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True Dual-Ported memory cells...
Description
VERY LOW POWER 1.8V 8K/4K x 16 DUAL-PORT STATIC RAM
Features
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IDT70P258/248L
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True Dual-Ported memory cells which allow simultaneous reads of the same memory location High-speed access – Industrial: 55ns (max.) Low-power operation IDT70P258/248L Active: 27mW (typ.) Standby: 3.6µW (typ.) Separate upper-byte and lower-byte control for multiplexed bus compatibility IDT70P258/248 easily expands data bus width to 32 bits or more using the Master/Slave select when cascading more than one device
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Supports 3.0V, 2.5V and 1.8V I/O's M/S = VDD for BUSY output flag on Master M/S = VSS for BUSY input on Slave Input Read Register Output Drive Register BUSY and Interrupt Flag On-chip port arbitration logic Full on-chip hardware support of semaphore signaling between ports Fully asynchronous operation from either port LVTTL-compatible, single 1.8V (±100mV) power supply Available in 100 Ball 0.5mm-pitch BGA Industrial temperature range (-40°C to +85°C)
Functional Block Diagram
R/WL UBL R/WR UBR
LBL CEL OEL
LBR CER OER
I/O8L-I/O15L I/O0L-I/O7L BUSYL
(2,3)
I/O8R-I/O15R I/O Control I/O Control I/O0R-I/O7R BUSYR
(2,3)
,
A12L(1) A0L
Address Decoder
MEMORY ARRAY
Address Decoder
A12R(1) A0R
CEL OEL R/WL IRR0,IRR1 INPUT READ REGISTER AND OUTPUT DRIVE REGISTER SFEN
13 13
CER OER R/WR ODR 0 - ODR4
CEL OEL R/WL SEML (3) INTL
ARBITRATION INTERRUPT SEMAPHORE LOGIC
CER OER R/WR SEMR INTR(3)
5675 drw 01
M/S
NOTES: 1. A12X is a NC for IDT70P248. 2. (MA...
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