TM 3.3 VOLT CMOS SyncBiFIFO IDT72V3622 256 x 36 x 2 IDT72V3632 512 x 36 x 2 IDT72V3642 1,024 x 36 x 2 FFA/IRA, EFA/ORA, AEA, and AFA flags synchronized by CLKA FEATURES: FFB/IRB, EFB/ORB, AEB, and AFB flags synchronized by CLKB Memory storage capacity: Select IDT Standard timing (using EFA, EFB, FFA and FFB flags IDT72V3622 256 x 36 x 2 functions) or First Word Fall Through timing (using ORA, ORB, IRA IDT72V3632 512 x 36 x 2 and IRB flag functions) IDT72V3642 1,024 x 36 x 2 Available space-saving 120-pin Thin Quad Flatpack (TQFP) Supports clock frequencies up to 100 MHz Functionally compatible to the 5V operating IDT723622/723632/ Fast access times of 6.5ns 723642 Free-running CLKA and CLKB may be asynchronous or coincident Industrial temperature range (40 C to +85 C) is available (simultaneous reading and writing of data on a single clock edge Green parts available, see ordering information is permitted) Two independent clocked FIFOs buffering data in opposite direc- DESCRIPTION: tions Mailbox bypass register for each FIFO The IDT72V3622/72V3632/72V3642 are functionally compatible versions Programmable Almost-Full and Almost-Empty flags of the IDT723622/723632/723642, designed to run off a 3.3V supply for Microprocessor Interface Control Logic exceptionally low-power consumption. These devices are monolithic, high- FUNCTIONAL BLOCK DIAGRAM MBF1 Mail 1 Register CLKA Port-A CSA Control W/RA RAM Logic ENA ARRAY MBA 256 x 36 512 x 36 36 1,024 x 36 FIFO1, Mail1 RST1 Reset Logic Write Read Pointer Pointer 36 Status Flag EFB/ORB FFA/IRA Logic AEB AFA FIFO 1 FS0 Programmable Flag Timing FWFT FS1 Offset Registers Mode A0 - A35 10 B0 - B35 FIFO 2 Status Flag EFA/ORA FFB/IRB Logic AEA AFB 36 Read Write Pointer Pointer 36 FIFO2, Mail2 RST2 Reset Logic RAM ARRAY 256 x 36 CLKB 512 x 36 Port-B 1,024 x 36 CSB Control W/RB Logic ENB Mail 2 MBB Register 4660 drw 01 MBF2 IDT and the IDT logo are registered trademark of Integrated Device Technology, Inc SyncBiFIFO is a trademark of Integrated Device Technology, Inc. COMMERCIAL TEMPERATURE RANGE FEBRUARY 2015 1 2015 Integrated Device Technology, Inc. All rights reserved. Product specifications subject to change without notice. DSC-4660/9 Input Output Register Register Output Input Register RegisterTM IDT72V3622/72V3632/72V3642 CMOS 3.3V SyncBiFIFO COMMERCIAL TEMPERATURE RANGE 256 x 36 x 2, 512 x 36 x 2, 1,024 x 36 x 2 These devices are a synchronous (clocked) FIFO, meaning each port DESCRIPTION (CONTINUED) employs a synchronous interface. All data transfers through a port are gated speed, low-power, CMOS Bidirectional SyncFIFO (clocked) memories which to the LOW-to-HIGH transition of a port clock by enable signals. The clocks for support clock frequencies up to 100MHz and have read access times as fast each port are independent of one another and can be asynchronous or as 6.5ns. Two independent 256/512/1,024 x 36 dual-port SRAM FIFOs on coincident. The enables for each port are arranged to provide a simple board each chip buffer data in opposite directions. Communication between bidirectional interface between microprocessors and/or buses with synchro- each port may bypass the FIFOs via two 36-bit mailbox registers. Each mailbox nous control. register has a flag to signal when new mail has been stored. PIN CONFIGURATION B35 90 A35 1 B34 89 A34 2 88 B33 A33 3 87 B32 A32 4 GND 86 VCC 5 B31 85 A31 6 84 B30 A30 7 83 B29 GND 8 B28 82 A29 9 B27 81 A28 10 80 B26 A27 11 79 VCC A26 12 B25 78 A25 13 B24 77 A24 14 76 GND A23 15 75 B23 FWFT 16 B22 74 A22 17 B21 73 VCC 18 72 B20 A21 19 71 B19 A20 20 B18 70 A19 21 GND 69 A18 22 68 B17 GND 23 67 B16 A17 24 VCC 66 A16 25 B15 65 A15 26 64 B14 A14 27 B13 63 A13 28 B12 62 VCC 29 GND 61 A12 30 4660 drw 03 TQFP (PNG120, order code: PF) TOP VIEW 2 GND 31 120 GND A11 119 CLKA 32 ENA A10 33 118 A9 W/RA 34 117 A8 35 CSA 116 A7 36 115 FFA/IRA A6 37 114 EFA/ORA GND 38 113 VCC A5 39 112 AFA A4 40 AEA 111 A3 41 MBF2 110 VCC MBA 42 109 A2 43 RST1 108 A1 44 FS0 107 A0 45 GND 106 GND FS1 46 105 B0 RST2 47 104 B1 48 MBB 103 B2 49 102 MBF1 B3 50 101 VCC B4 51 100 AEB B5 52 99 AFB GND 53 98 EFB/ORB B6 54 97 FFB/IRB VCC 55 96 GND B7 56 95 CSB B8 57 94 W/RB 58 B9 93 ENB B10 59 92 CLKB B11 60 91 VCC