Features • • • • • • • • • • • • • • • 16 Mbit SRAM Multi Chip Module Allows 32-, 16- or 8-bit access configuration Operating Voltage: 3.3V + 0.3V, 5V Tolerant Access Time: – 25 ns, 20 ns – 18 ns (preliminary information) Very Low Power Consumption – Active: 595 mW per byte (Max) @ 20 ns(1), 415mW per byte (Max) @ 50ns(2) – Standby: 15 mW (Typ) Military Temperature Range: -55 to +125°C TTL-Compatible Inputs and Outputs Asynchronous Die manufactured on Atmel 0.25 µm Radiation Hardened Process No Single Event Latch Up below LET Threshold of 80 MeV/mg/cm2 Tested up to a Total Dose of 300 krads (Si) according to MIL-STD-883 Method 1019 ESD Better than 2000V Quality Grades: – QML-Q or V with SMD 5962-06229 – ESCC 950 Mils Wide MQFP 68 Package Mass : 8.5 grams Notes: 1. For AT68166FT-20 only. 540mW for AT68166FT-25. 2. For AT68166FT-20 only. 450mW for AT68166FT-25. Rad Hard 16 MegaBit 3.3V 5V Tolerant SRAM MultiChip Module AT68166FT Description The AT68166FT is a 16Mbit SRAM packaged in a hermetic Multi Chip Module (MCM) for space applications. The AT68166FT MCM incorporates four 4Mbit AT60142FT SRAM dice. It can be organized as either one bank of 512Kx8, two banks of 512Kx16 or four banks of 512Kx8. It combines rad-hard capabilities, a latch-up threshold of 80MeV.cm²/mg, a Multiple Bit Upset immunity and a total dose tolerance of 300Krads, with a fast access time. The MCM packaging technology allows a reduction of the PCB area by 50% with a weight savings of 75% compared to four 4Mbit packages. Thanks to the small size of the 4Mbit SRAM die, Atmel has been able to accommodate the assembly of the four dice on one side of the package which facilitates the power dissipation. The compatibility with other products allows designers to easily migrate to the Atmel AT68166FT memory. The AT68166FT is powered at 3.3V and is 5V tolerant. The AT68166FT is processed according to the test methods of the latest revision of the MIL-PRF-38535 or the ESCC 9000. 7531G–AERO–07/07 Block Diagram Figure 1. AT68166FT Block Diagram CS3 WE3 CS2 WE2 CS1 WE1 CS0 WE0 A[18:0] OE BANK3 BANK2 BANK1 BANK0 512k x 8 512k x 8 512k x 8 512k x 8 I/O[31:24] or I/O2[31:16] or I/O3[7:0] I/O[23:16] or I/O2[15:0] or I/O2[7:0] I/O[15:8] or I/O1[31:16] or I/O1[7:0] I/O[7:0] or I/O1[15:0] or I/O[7:0] Figure 2. 512K x 8 Banks Block Diagram (AT60142FT) A0 A10 I/Ox0 I/Ox7 CSx WEx OE Packages AT68166FT is packed in MQFP68. Access Times AT68166FT 25 ns 20 ns 18 ns YM YS YS The pin assignment depends on the access time. There are 2 versions: 2 – YM package where 3 pins are not connected. – YS package where the 3 above pins are connected to GND or VCC. AT68166FT 7531G–AERO–07/07 AT68166FT Pin Configuration Table 1. AT68166FT pin assignment in YS package Lead Signal Lead Signal Lead Signal Lead Signal 1 I/O0[0] 18 VCC 35 I/O3[7] 52 VCC 2 I/O0[1] 19 A11 36 I/O3[6] 53 A10 3 I/O0[2] 20 A12 37 I/O3[5] 54 A9 4 I/O0[3] 21 A13 38 I/O3[4] 55 A8 5 I/O0[4] 22 A14 39 I/O3[3] 56 A7 6 I/O0[5] 23 A15 40 I/O3[2] 57 A6 Note: 7 I/O0[6] 24 A16 41 I/O3[1] 58 WE0 8 I/O0[7] 25 CS0 42 I/O3[0] 59 CS3 9 GND 26 OE 43 GND 60 GND 10 I/O1[0] 27 CS1 44 I/O2[7] 61 CS2 11 I/O1[1] 28 A17 45 I/O2[6] 62 A5 12 I/O1[2] 29 WE1 46 I/O2[5] 63 A4 13 I/O1[3] 30 WE2 47 I/O2[4] 64 A3 14 I/O1[4] 31 WE3 48 I/O2[3] 65 A2 15 I/O1[5] 32 A18 49 I/O2[2] 66 A1 16 I/O1[6] 33 GND 50 I/O2[1] 67 A0 17 I/O1[7] 34 VCC 51 I/O2[0] 68 VCC In YM package leads 33, 34 and 68 are not connected. 3 7531G–AERO–07/07 AT68166FT (top view) 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 I/O2[0] I/O2[1] I/O2[2] I/O2[3] I/O2[4] I/O2[5] I/O2[6] I/O2[7] GND I/O3[0] I/O3[1] I/O3[2] I/O3[3] I/O3[4] I/O3[5] I/O3[6] I/O3[7] VCC A11 A12 A13 A14 A15 A16 CS0 0E CS1 A17 WE1 WE2 WE3 A18 NC NC I/O0[0] I/O0[1] I/O0[2] I/O0[3] I/O0[4] I/O0[5] I/O0[6] I/O0[7] GND I/O1[0] I/O1[1] I/O1[2] I/O1[3] I/O1[4] I/O1[5] I/O1[6] I/O1[7] 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 NC A0 A1 A2 A3 A4 A5 CS2 GND CS3 WE0 A6 A7 A8 A9 A10 VCC Figure 3. AT68166FT pin assignment in YM package AT68166FT (top view) 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 I/O2[0] I/O2[1] I/O2[2] I/O2[3] I/O2[4] I/O2[5] I/O2[6] I/O2[7] GND I/O3[0] I/O3[1] I/O3[2] I/O3[3] I/O3[4] I/O3[5] I/O3[6] I/O3[7] VCC A11 A12 A13 A14 A15 A16 CS0 0E CS1 A17 WE1 WE2 WE3 A18 GND VCC I/O0[0] I/O0[1] I/O0[2] I/O0[3] I/O0[4] I/O0[5] I/O0[6] I/O0[7] GND I/O1[0] I/O1[1] I/O1[2] I/O1[3] I/O1[4] I/O1[5] I/O1[6] I/O1[7] 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 VCC A0 A1 A2 A3 A4 A5 CS2 GND CS3 WE0 A6 A7 A8 A9 A10 VCC Figure 4. AT68166FT pin assignment in YS package 4 AT68166FT 7531G–AERO–07/07 AT68166FT Pin Description Table 2. Pin Names Name Description A0 - A18 Address Inputs I/O0 - I/O31 Data Input/Output CS0 - CS3 Chip Select WE0 - WE3 Write Enable OE Output Enable VCC Power Supply GND(1) Ground Note: 1. The package lid is connected to GND Table 3. Truth Table(1) CSx WEx OE Inputs/Outputs Mode H X X Z Standby L H L Data Out Read L L X Data In Write L H H Z Output Disable Note: 1. L=low, H=high, X= H or L, Z=high impedance. 5 7531G–AERO–07/07 Electrical Characteristics Absolute Maximum Ratings* Supply Voltage to GND Potential:.........................-0.5V to +7V *NOTE: DC Input Voltage:........................................GND -0.5V to 4.6V DC Output Voltage High Z State: ................GND -0.5V to 4.6V Storage Temperature: .................................... -65°C to +150°C Output Current Into Outputs (Low): ............................... 20 mA Stresses beyond those listed under "Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Electro Statics Discharge Voltage:..... .........> 2000V (MIL STD 883D Method 3015.3) Military Operating Range Operating Voltage Operating Temperature 3.3 + 0.3V -55°C to + 125°C Recommended DC Operating Conditions Parameter Note: Description Vcc Supply voltage GND Ground Min Typ Max Unit 3 3.3 3.6 V 0.0 0.0 0.0 V VIL Input low voltage GND - 0.3 0.0 0.8 V VIH Input high voltage 2.2 – 5.5V(1) V Min Typ Max Unit 1. 5.8V in transient conditions. Capacitance Parameter Cin(1) (OE and Ax) Input capacitance – – 48 pF Cin(1) (CSx and WEx) Input capacitance – – 12 pF I/O capacitance – – 12 pF Cio(1) Note: 6 Description 1. Guaranteed but not tested. AT68166FT 7531G–AERO–07/07 AT68166FT DC Parameters Maximum Parameter Description Minimum Typical IIX(1) Input leakage current -1 – 1 1 1 µA IOZ(1) Output leakage current -1 – 1 1 1 µA Input Leakage Current (OE & Axx) – – 10 6 6 µA Input Leakage Current (WE & CS) – – 5 2 2 µA Output Leakage Current – – 5 1.5 1.5 µA VOL(3) Output low voltage – – 0.4 0.4 0.4 V VOH(4) Output high voltage 2.4 – – – – V IIH(2) at 5.5V IOZH(2) at 5.5V Notes: 1. 2. 3. 4. AT68166FT-25 AT68166FT-20 AT68166FT-18 Unit GND < VIN < VCC, GND < VOUT < VCC Output Disabled. VIN = 5.5V, VOUT = 5.5V, Output Disabled. VCC min. - IOL = 6 mA VCC min. IOH = -4 mA 7 7531G–AERO–07/07 Consumption Symbol Description TAVAV/TAVAW Test Condition AT68166FT-25 AT68166FT-20 AT68166FT-18 (preliminary) Unit Value ICCSB(1) Standby Supply Current – 10 7 7.5 mA max ICCSB1(2) Standby Supply Current – 8 6 7 mA max – – 150 85 15 – 165 145 80 12 170 165 145 80 12 mA max – – 150 125 110 – 140 135 115 105 145 140 135 115 105 mA max Read per byte Dynamic Operating Current 18 ns 20 ns 25 ns 50 ns 1 µs ICCOP(4) Write per byte Dynamic Operating Current 18 ns 20 ns 25 ns 50 ns 1 µs ICCOP(3) Notes: 1. 2. 3. 4. All CSx >VIH All CSx > VCC - 0.3V F = 1/TAVAV, Iout = 0 mA, WEx = OE = VIH, VIN = GND/VCC, VCC max. F = 1/TAVAW, Iout = 0 mA, WEx = VIL, OE = VIH , VIN = GND/VCC, VCC max. Data Retention Mode Atmel CMOS RAM's are designed with battery backup in mind. Data retention voltage and supply current are guaranteed over temperature. The following rules insure data retention: 1. During data retention chip select CSx must be held high within VCC to VCC -0.2V. 2. Output Enable (OE) should be held high to keep the RAM outputs high impedance, minimizing power dissipation. 3. During power-up and power-down transitions CSx and OE must be kept between VCC + 0.3V and 70% of VCC. 4. The RAM can begin operation > tR ns after VCC reaches the minimum operation voltages (3V). Figure 5. Data Retention Timing vcc CSx 8 AT68166FT 7531G–AERO–07/07 AT68166FT Data Retention Characteristics Parameter Description Min Typ TA = 25°C Max Unit VCCDR VCC for data retention 2.0 – – V tCDR Chip deselect to data retention time 0.0 – – ns tR Operation recovery time – – ns tAVAV (1) 6 ICCDR (2) Data retention current – 3 4.5 (AT68166FT-20) 5 1. 2. (AT68166FT-25) mA (AT68166FT-18) TAVAV = Read cycle time. All CSx = VCC, VIN = GND/VCC. 9 7531G–AERO–07/07 AC Characteristics Temperature Range:................................................ -55 +125°C Supply Voltage: ....................................................... 3.3 +0.3V Input Pulse Levels: .................................................. GND to 3.0V Input Rise and Fall Times:....................................... 3ns (10 - 90%) Input and Output Timing Reference Levels: ............ 1.5V Output Loading IOL/IOH:............................................ See Figure 3 Figure 6. AC Test Loads Waveforms General Specific (TWLQZ, TWHQX, TELQX, TEHQZ TGLQX, TGHQZ) Write Cycle Table 4. Write cycle timings(1) AT68166FT-25 Notes: 10 Symbol Parameter TAVAW AT68166FT-20 AT68166FT-18 (preliminary) min max min max min max Unit Write cycle time 20 - 20 - 18 - ns TAVWL Address set-up time 2 - 2 - 2 - ns TAVWH Address valid to end of write 14 - 11 - 10 - ns TDVWH Data set-up time 9 - 8 - 7 - ns TELWH CS low to write end 12 - 12 - 11 - ns TWLQZ Write low to high Z(2) - 10 - 10 - 9 ns TWLWH Write pulse width 12 - 9 - 9 - ns TWHAX Address hold from end of write 0 - 0 - 0 - ns TWHDX Data hold time 2 - 1 - 1 - ns TWHQX Write high to low Z(2) 5 - 5 - 5 - ns 1. Timings figures applicable for 8-bit, 16-bit and 32-bit mode. 2. Parameters guaranteed, not tested, with output loading 5 pF. (See “AC Test Loads Waveforms” on page 10.) AT68166FT 7531G–AERO–07/07 AT68166FT Figure 7. Write Cycle 1. WE Controlled, OE High During Write ADDRESS CSx E WEx E OE I/Os Figure 8. Write Cycle 2. WE Controlled, OE Low ADDRESS CSx WEx E E I/Os Figure 9. Write Cycle 3. CS Controlled ADDRESS CSx WEx E I/Os The internal write time of the memory is defined by the overlap of CS Low and WE LOW. Both signals must be activated to initiate a write and either signal can terminate a write by going in active mode. The data input setup and hold timing should be referenced to the active edge of the signal that terminates the write. Data out is high impedance if OE= VIH. 11 7531G–AERO–07/07 Read Cycle Table 5. Read cycle timings(1) AT68166FT-25 Notes: 12 Symbol Parameter TAVAV Read cycle time TAVQV AT68166FT-20 AT68166FT-18 (preliminary) min max min max min max Unit 25 - 20 - 18 - ns Address access time - 25 - 20 - 18 ns TAVQX Address valid to low Z 5 - 5 - 5 - ns TELQV Chip-select access time - 25 - 20 - 18 ns TELQX CS low to low Z(2) 5 - 5 - 5 - ns TEHQZ CS high to high Z(2) - 10 - 9 - 9 ns TGLQV Output Enable access time - 12 - 10 - 9 ns TGLQX OE low to low Z(2) 2 - 2 - 2 - ns TGHQZ OE high to high Z (2) - 10 - 9 - 9 ns 1. Timings figures applicable for 8-bit, 16-bit and 32-bit mode. 2. Parameters guaranteed, not tested, with output loading 5 pF. (See “AC Test Loads Waveforms” on page 10.) AT68166FT 7531G–AERO–07/07 AT68166FT Figure 10. Read Cycle nb 1: Address Controlled (CS = OE = VIL, WE = VIH) ADDRESS DOUT Figure 11. Read Cycle nb 2: Chip Select Controlled (WE = VIH) CSx OE DOUT 13 7531G–AERO–07/07 Typical Applications This section presents some standard implementations of the AT68166FT in application. 32-bit mode application When used on a 32-bit (word) application, the module shall be connected as follow : • The 32 lines of data are connected to distinct data lines • The four CSx are connected together and linked to a single host CS output • Each one of the four WEx is connected to a dedicated WE line on the host to allow byte, half word and word format write. Figure 12. 32-bit typical application ( 1 SRAM bank) A AT68166FT RAMS0* RAMOE0* RWE[3:0]* CS[3:0] OE WE[3:0] A[17:0] I/O[31:0] TSC695F D[31:0] A[19:2] A[27:0] D[31:0] D[31:0] 16-bit mode application D A[19:2] When used on a 16-bit (half word) application, the module can be connected as presented in the following figure. This allows use of a single AT68166FT part for two SRAM memory banks. All input controls of the AT68166FT not used in the application shall be pulled-up. Figure 13. 16-bit typical application (two SRAM banks) RAMOE[1:0]* AT68166FT RAMS1* RWE0* CS[3:2] WE[3:2] RAMS0* RWE0* CS[1:0] WE[1:0] TSC695F A[27:0] D[31:0] 8-bit mode application OE A A[17:0] I/O[31:16] I/O[15:0] A[18:1] D D[31:16] D[31:16] A[18:1] D[31:0] When used on a 8-bit (byte) application, the module can be connected as presented in the following figure. This allows use of a single AT68166FT part for up to four SRAM memory banks. All input controls of the AT68166FT not used in the application shall be pulled-up. 14 AT68166FT 7531G–AERO–07/07 AT68166FT Figure 14. 8-bit typical application (two SRAM banks) RAMOE[1:0]* TSC695F OE RAMS2* RWE0* CS[3] WE[3] RAMS2* RWE0* CS[2] WE[2] RAMS1* RWE0* CS[1] WE[1] RAMS0* RWE0* CS[0] WE[0] A[27:0] D[31:0] A AT68166FT A[17:0] I/O[31:24] I/O[23:16] I/O[15:8] I/O[7:0] A[17:0] D D[31:24] D[31:24] D[31:24] D[31:24] A[17:0] D[31:0] 15 7531G–AERO–07/07 Ordering Information Part Number Temperature Range Speed Package Flow AT68166FT-YM25-E 25°C 25 ns MQFPT68 Engineering Samples 5962-0622901QXC -55° to +125°C 25 ns MQFPT68 QML Q 5962-0622901VXC -55° to +125°C 25 ns MQFPT68 QML V 5962R0622901VXC -55° to +125°C 25 ns MQFPT68 QML V RHA AT68166FT-YM25-SCC -55° to +125°C 25 ns MQFPT68 ESCC AT68166FT AT68166FT-YS20-E 25°C 20 ns MQFPT68 Engineering Samples -55° to +125°C 20 ns MQFPT68 QML Q (2) -55° to +125°C 20 ns MQFPT68 QML V (2) -55° to +125°C 20 ns MQFPT68 QML V RHA AT68166FT-YS20-SCC -55° to +125°C 20 ns MQFPT68 ESCC AT68166FT-YS18-E(1) 25°C 18 ns MQFPT68 Engineering Samples QML Q AT68166FT-YS20-MQ(2) AT68166FT-YS20-SV AT68166FT-YS20-SR (2) AT68166FT-YS18-MQ (1)(2) -55° to +125°C 18 ns MQFPT68 (1)(2) -55° to +125°C 18 ns MQFPT68 QML V AT68166FT-YS18-SR(1)(2) -55° to +125°C 18 ns MQFPT68 QML V RHA AT68166FT-YS18-SCC(1)(2) -55° to +125°C 18 ns MQFPT68 ESCC AT68166FT-YS18-SV Note: 1. Please contact your local sales office. 2. Will be replaced by SMD part number when available. 16 AT68166FT 7531G–AERO–07/07 AT68166FT Package Drawings 68-lead Quad Flat Pack (950 Mils) with non conductive tie bar Note: Lid is connected to Ground. Note: YM and YS package drawings are identical. 17 7531G–AERO–07/07 Document Revision History Changes from 7531C to 7531D 1. Update of access time parameters. Changes from 7531D to 7531E 1. Added YS package. Changes from 7531E to 7531F 1. Updated ordering information. Changes from 7531F to 7531G 1. Split datasheet into two seperate documents: removed AT68166F from this document. Please refer to document 7747 on the Atmel web site. 18 AT68166FT 7531G–AERO–07/07 Atmel Corporation 2325 Orchard Parkway San Jose, CA 95131, USA Tel: 1(408) 441-0311 Fax: 1(408) 487-2600 Regional Headquarters Europe Atmel Sarl Route des Arsenaux 41 Case Postale 80 CH-1705 Fribourg Switzerland Tel: (41) 26-426-5555 Fax: (41) 26-426-5500 Asia Room 1219 Chinachem Golden Plaza 77 Mody Road Tsimshatsui East Kowloon Hong Kong Tel: (852) 2721-9778 Fax: (852) 2722-1369 Japan 9F, Tonetsu Shinkawa Bldg. 1-24-8 Shinkawa Chuo-ku, Tokyo 104-0033 Japan Tel: (81) 3-3523-3551 Fax: (81) 3-3523-7581 Atmel Operations Memory 2325 Orchard Parkway San Jose, CA 95131, USA Tel: 1(408) 441-0311 Fax: 1(408) 436-4314 RF/Automotive Theresienstrasse 2 Postfach 3535 74025 Heilbronn, Germany Tel: (49) 71-31-67-0 Fax: (49) 71-31-67-2340 Microcontrollers 2325 Orchard Parkway San Jose, CA 95131, USA Tel: 1(408) 441-0311 Fax: 1(408) 436-4314 La Chantrerie BP 70602 44306 Nantes Cedex 3, France Tel: (33) 2-40-18-18-18 Fax: (33) 2-40-18-19-60 ASIC/ASSP/Smart Cards 1150 East Cheyenne Mtn. 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