HIGH SPEED IDT71321SA/LA 2K X 8 DUAL-PORT IDT71421SA/LA STATIC RAM WITH INTERRUPTS Features High-speed access MASTER IDT71321 easily expands data bus width to 16-or- Commercial: 20/25/35/55ns (max.) more-bits using SLAVE IDT71421 On-chip port arbitration logic (IDT71321 only) Industrial: 25/55ns (max.) Low-power operation BUSY output flag on IDT71321 BUSY input on IDT71421 IDT71321/IDT71421SA Fully asynchronous operation from either port Active: 325mW (typ.) Battery backup operation 2V data retention (LA only) Standby: 5mW (typ.) TTL-compatible, single 5V 10% power supply IDT71321/421LA Available in 52-Pin PLCC, 64-Pin TQFP, and 64-Pin STQFP Active: 325mW (typ.) Industrial temperature range (40C to +85C) is available Standby: 1mW (typ.) for selected speeds Green parts available, see ordering information Two INT flags for port-to-port communications Functional Block Diagram OEL OER CEL CER R/WL R/WR I/O0L-I/O7L I/O0R-I/O7R I/O I/O Control Control (1,2) (1,2) BUSYL BUSYR A10L A10R Address MEMORY Address Decoder ARRAY Decoder A0L A0R 11 11 ARBITRATION CEL and CER INTERRUPT OER OEL LOGIC R/WR R/WL (2) (2) INTR INTL 2691 drw 01 NOTES: 1. IDT71321 (MASTER): BUSY is open drain output and requires pullup resistor of 270 . IDT71421 (SLAVE): BUSY is input. 2. Open drain output: requires pullup resistor of 270 . OCTOBER 2008 1 DSC-2691/13 2008 Integrated Device Technology, Inc.IDT71321SA/LA and IDT71421SA/LA High Speed 2K x 8 Dual-Port Static RAM with Interrupts Industrial and Commercial Temperature Ranges Description The IDT71321/IDT71421 are high-speed 2K x 8 Dual-Port Static address, and I/O pins that permit independent, asynchronous access for reads or writes to any location in memory. An automatic power RAMs with internal interrupt logic for interprocessor communications. down feature, controlled by CE, permits the on chip circuitry of each The IDT71321 is designed to be used as a stand-alone 8-bit Dual- port to enter a very low standby power mode. Port Static RAM or as aMASTE Dual-Port Static RAM together Fabricated using IDT s CMOS high-performance technology, these with the IDT71421SLAV Dual-Port in 16-bit-or-more word width devices typically operate on only 325mW of power. Low-power (LA) systems. Using the IDT MASTER/SLAVE Dual-Port Static RAM ap- versions offer battery backup data retention capability, with each Dual- proach in 16-or-more-bit memory system applications results in full Port typically consuming 200W from a 2V battery. speed, error-free operation without the need for additional discrete The IDT71321/IDT71421 devices are packaged in 52-pin PLCCs, logic. 64-pin TQFPs, and 64-pin STQFPs. Both devices provide two independent ports with separate control, (1,2,3) Pin Configurations INDEX 746 5 4 3 2 52 51 50 49 487 A1L OER 8 46 1 2L 9 45 A A0R 3L 10 44 A A1R 4L 11 43 A A2R 5L A 12 42 A3R A6L 13 IDT71321/421J 41 4R A (4) J52-1 A7L 14 40 5R A 8L 15 39 A A6R PLCC 9L 16 (5) 38 A A7R Top View 0L 17 37 I/O A8R 1L 18 36 I/O A9R I/O 2L 19 35 NC 20 34 I/O 3L 7R I/O 21 22 23 24 25 26 27 28 29 30 31 32 33 , 2691 drw 02 INDEX 1 OEL 48 OER 2 A0L 47 A0R 3 A1L 46 A1R 4 A2L 45 A2R 5 A3L 44 A3R 6 IDT71321/421PF or TF 43 A4L A4R (4) PN64-1 / PP64-1 7 A5L 42 A5R 8 41 A6L A6R 64-Pin TQFP 9 40 N/C N/C 64-Pin STQFP 10 A7R A7L 39 (5) Top View 11 A8L 38 A8R 12 37 A9L A9R 13 NOTES: 36 N/C N/C 14 1. All VCC pins must be connected to power supply. 35 I/O0L N/C 2. All GND pins must be connected to ground supply. 15 34 I/O7R I/O1L 3. J52-1 package body is approximately .75 in x .75 in x .17 in. 16 33 I/O2L I/O6R PN64-1 package body is approximately 14mm x 14mm x 1.4mm. , PP64-1 package body is approximately 10mm x 10mm x 1.4mm. 2691 drw 03 4. This package code is used to reference the package diagram. 5. This text does not indicate orientation of the actual part-marking. 6.422 I/O A0L 4L OE I/O L 5L A10L I/O 6L INT I/O7L L BUSY NC L GND R/WL CEL 0R I/O V CC I/O1R CER 2R I/O R/W R I/O3R BUSY R 4R I/O INTR 5R I/O A10R 6R I/O I/O3L 17 64 N/C 18 63 N/C N/C 19 62 A10L I/O4L INTL I/O5L 20 61 21 60 BUSYL I/O6L 22 I/O7L 59 R/WL 23 58 CEL N/C 24 57 VCC GND 25 GND 56 VCC I/O0R 26 55 CER I/O1R 27 R/WR 54 I/O2R 28 BUSYR 53 I/O3R 29 52 INTR N/C 30 A10R 51 31 N/C I/O4R 50 N/C I/O5R 32 49