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IDT70T34L Datasheet(PDF) 1 Page - Integrated Device Technology |
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IDT70T34L Datasheet(HTML) 1 Page - Integrated Device Technology |
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1 / 21 page  ©2002 Integrated Device Technology, Inc. DECEMBER 2002 DSC-5639/2 1 PRELIMINARY IDT70T35/34L HIGH-SPEED 2.5V 8/4K x 18 DUAL-PORT 8/4K x 16 DUAL-PORT STATIC RAM width to 36 bits (32 bits) or more using the Master/Slave select when cascading more than one device ◆ ◆ ◆ ◆ ◆ M/ S = VIH for BUSY output flag on Master M/ S = VIL for BUSY input on Slave ◆ ◆ ◆ ◆ ◆ 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 2.5V (±100mV) power supply ◆ ◆ ◆ ◆ ◆ Available in a 100-pin Thin Quad Flatpack (TQFP) package and 100-pin fine pitch Ball Grid Array (fpBGA) ◆ ◆ ◆ ◆ ◆ Industrial temperature range (-40°C to +85°C) is available for selected speeds Functional Block Diagram NOTES: 1. A12 is a NC for IDT70T34 and IDT70T24. 2. (MASTER): BUSY is output; (SLAVE): BUSY is input. 3. BUSY outputs and INT outputs are non-tri-stated push-pull. 4. I/O0x - I/O7x for IDT70T25/24. 5. I/O8x - I/O15x for IDT70T25/24. Features ◆ ◆ ◆ ◆ ◆ True Dual-Ported memory cells which allow simultaneous reads of the same memory location ◆ ◆ ◆ ◆ ◆ High-speed access IDT70T35/34L (IDT70T25/24L) – Commercial: 20/25ns (max.) – Industrial: 25ns (max.) ◆ ◆ ◆ ◆ ◆ Low-power operation – IDT70T35/34L (IDT70T25/24L) Active: 200mW (typ.) Standby: 600 µW (typ.) ◆ ◆ ◆ ◆ ◆ Separate upper-byte and lower-byte control for multiplexed bus compatibility ◆ ◆ ◆ ◆ ◆ IDT70T35/34L (IDT70T25/24L) easily expands data bus I/O Control Address Decoder MEMORY ARRAY ARBITRATION INTERRUPT SEMAPHORE LOGIC Address Decoder I/O Control R/ WL BUSYL A12L(1) A0L 5639 drw 01 UBL LBL CEL OEL I/O9L-I/O17L(5) I/O0L-I/O8L(4) CEL OEL R/ WL SEML INTL M/ S R/ WR BUSYR UBR LBR CER OER I/O9R-I/O17R(5) I/O0R-I/O8R(4) A12R(1) A0R R/ WR SEMR INTR CER OER (3) (2,3) (2,3) (3) 13 13 , IDT70T25/24L |
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