Standard Products UT8R1M39 40Megabit SRAM MCM UT8R2M39 80Megabit SRAM MCM UT8R4M39 160Megabit SRAM MCM Data Sheet December 2015 The most important thing we build is trust INTRODUCTION FEATURES 20ns Read, 10ns Write maximum access times available Functionally compatible with traditional 1M, 2M, or 4M x 39 SRAM devices CMOS compatible input and output levels, three-state bidirectional data bus - I/O Voltages 2.3V to 3.6V, 1.7V to 2.0V core Available densities: - UT8R1M39: 40, 894, 464 bits - UT8R2M39: 81, 788, 928 bits - UT8R4M39: 163, 577, 856 bits Operational Environment: - Total-dose: 100 krad(Si) The UT8R1M39, UT8R2M39, and UT8R4M39 are high performance CMOS static RAM multichip modules (MCMs) organized as two, four or eight individual 524,288 words x 39 bits dice respectively. Easy memory expansion is provided by active LOW chip enables (En), an active LOW output enable (G), and three-state drivers. This device has a power-down feature that reduces power consumption by more than 90% when deselected. Writing to the device is accomplished by driving one of the chip enable (En) inputs LOW and the write enable (W) input LOW. Data on the 39 I/O pins (DQ0 through DQ38) is then written into the location specified on the address pins (A0 through A18). Reading from the device is accomplished by driving one of the chip enables (En) and output enable (G) LOW while driving write enable (W) HIGH. Under these conditions, the contents of the memory location specified by the address pins will appear on the I/O pins. Note: Only one En pin may be active at any time. - SEL Immune: <110 MeV-cm2/mg - SEU error rate = 7.3x10-7 errors/bit-day assuming geosynchronous orbit, Adam’s 90% worst environment. Packaging options: - 132-lead side-brazed dual cavity ceramic quad flatpack Standard Microelectronics Drawing: - UT8R1M39: 5962-10205 - QML Q, Q+ and V compliant - UT8R2M39: 5962-10206 - QML Q, Q+, and Vcompliant - UT8R4M39: 5962-10207 - QML Q and Q+ compliant part The 39 input/output pins (DQ0 through DQ38) are placed in a high impedance state when the device is deselected (En HIGH), the outputs are disabled (G HIGH), or during a write operation (En LOW, W LOW). Figure 1. Block Diagram 36-00-01-008 Version 2.0.0 -1- Cobham Semiconductor Solutions Aeroflex.com/Memories 40M /80M/ 160M 2-, 4-, 8- Die SRAM MCM Module (0.90” Square, 132-lead Side-Brazed Dual Cavity Ceramic Flatpack) 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 80 79 78 77 76 75 74 73 72 71 70 69 68 67 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 TOP_DQ35 BOT_DQ35 DQ16 DQ17 DQ18 DQ19 VDD2 VSS DQ20 DQ21 DQ22 DQ23 VDD1 VSS NC VDD2 NC VDD2 NC VSS VDD1 DQ24 DQ25 DQ26 DQ27 VSS VDD2 DQ28 DQ29 DQ30 DQ31 BOT_DQ32 BOT_DQ33 TOP_DQ34 A11 A12 A13 VSS NC NC NC VDD2 NC VDD1 E7# (NC) E5# (NC) E3# (NC) E1# VDD1 G# VSS E2# E4# (NC) E6# (NC) E8# (NC) VDD1 VDD2 VSS VSS NC NC VSS A14 A15 A16 BOT_DQ34 TOP_DQ38 BOT_DQ38 DQ0 DQ1 DQ2 DQ3 VDD2 VSS DQ4 DQ5 DQ6 DQ7 VDD1 VSS NC VDD2 NC VDD2 NC VSS VDD1 DQ8 DQ9 DQ10 DQ11 VSS VDD2 DQ12 DQ13 DQ14 DQ15 TOP_DQ32 TOP_DQ33 132 131 130 129 128 127 126 125 124 1123 122 121 120 119 118 117 116 115 114 113 112 111 110 109 108 107 106 105 104 103 102 101 100 BOT_DQ37 TOP_DQ37 A0 A1 A2 A3 VDD1 VSS A4 A5 A17 NC VDD1 NC NC VSS NC VDD1 NC NC VDD1 NC A18 W# A6 VSS VDD1 A7 A8 A9 A10 TOP_DQ36 BOT_DQ36 December 2015 Notes: 1. NC=Pins are not connected on die. 2. (NC) = Depending on product version, the pin may be either an enable signal as named or NC. 3. Each TOP and BOT signal for DQ38 through DQ32 must be externally connected by user. Figure 2. Pin Diagram 36-00-01-008 Version 2.0.0 -2- Cobham Semiconductor Solutions Aeroflex.com/Memories December 2015 Table 1. Pin Description Pin Type Description A(18:0) I Address Input DQ(31:0) BI Data Input/Output En#* I Enable (Active Low) W# I Write Enable (Active Low) G# I Output Enable (Active Low) VDD1 P Power (1.8V nominal) VDD2 P Power (3.3V nominal) VSS P Ground Notes: * n represents any number of individual MCM (multichip module) die enables. May be 1-8 depending on device option. 36-00-01-008 Version 2.0.0 -3- Cobham Semiconductor Solutions Aeroflex.com/Memories December 2015 Table 2. Device Option: Signal and Pin Description 36-00-01-008 Version 2.0.0 Package Pin Number UT8R1M39 Signal Name UT8R2M39 Signal Name UT8R4M39 Signal Name Device Pin Description 1 TOP_DQ38 TOP_DQ38 TOP_DQ38 Data I/O1 2 BOT_DQ38 BOT_DQ38 BOT_DQ38 Data I/O1 3 DQ0 DQ0 DQ0 Data I/O 4 DQ1 DQ1 DQ1 Data I/O 5 DQ2 DQ2 DQ2 Data I/O 6 DQ3 DQ3 DQ3 Data I/O 7 VDD2 VDD2 VDD2 PWR 8 VSS VSS VSS PWR 9 DQ4 DQ4 DQ4 Data I/O 10 DQ5 DQ5 DQ5 Data I/O 11 DQ6 DQ6 DQ6 Data I/O 12 DQ7 DQ7 DQ7 Data I/O 13 VDD1 VDD1 VDD1 PWR 14 VSS VSS VSS PWR 15 NC NC NC NC 16 VDD2 VDD2 VDD2 PWR 17 NC NC NC NC 18 VDD2 VDD2 VDD2 PWR 19 NC NC NC NC 20 VSS VSS VSS PWR 21 VDD1 VDD1 VDD1 PWR 22 DQ8 DQ8 DQ8 Data I/O 23 DQ9 DQ9 DQ9 Data I/O 24 DQ10 DQ10 DQ10 Data I/O 25 DQ11 DQ11 DQ11 Data I/O 26 VSS VSS VSS PWR 27 VDD2 VDD2 VDD2 PWR 28 DQ12 DQ12 DQ12 Data I/O 29 DQ13 DQ13 DQ13 Data I/O -4- Cobham Semiconductor Solutions Aeroflex.com/Memories December 2015 Table 2. Device Option: Signal and Pin Description 36-00-01-008 Version 2.0.0 Package Pin Number UT8R1M39 Signal Name UT8R2M39 Signal Name UT8R4M39 Signal Name Device Pin Description 30 DQ14 DQ14 DQ14 Data I/O 31 DQ15 DQ15 DQ15 Data I/O 32 TOP_DQ32 TOP_DQ32 TOP_DQ32 Data I/O1 33 TOP_DQ33 TOP_DQ33 TOP_DQ33 Data I/O1 34 TOP_DQ34 TOP_DQ34 TOP_DQ34 Data I/O1 35 A11 A11 A11 ADDRESS INPUT 36 A12 A12 A12 ADDRESS INPUT 37 A13 A13 A13 ADDRESS INPUT 38 VSS VSS VSS PWR 39 NC NC NC NC 40 NC NC NC NC 41 NC NC NC NC 42 VDD2 VDD2 VDD2 PWR 43 NC NC Nc NC 44 VDD1 VDD1 VDD1 PWR 45 NC NC E7# CONTROL INPUT2 46 NC NC E5# CONTROL INPUT2 47 NC E3# E3# CONTROL INPUT2 48 E1# E1# E1# CONTROL INPUT 49 VDD1 VDD1 VDD1 PWR 50 G# G# G# CONTROL INPUT 51 VSS VSS VSS PWR 52 E2# E2# E2# CONTROL INPUT 53 NC E4# E4# CONTROL INPUT2 54 NC NC E6# CONTROL INPUT2 55 NC NC E8# CONTROL INPUT2 56 VDD1 VDD1 VDD1 PWR 57 VDD2 VDD2 VDD2 PWR 58 VSS VSS VSS PWR 59 VSS VSS VSS PWR 60 NC NC NC NC -5- Cobham Semiconductor Solutions Aeroflex.com/Memories December 2015 Table 2. Device Option: Signal and Pin Description 36-00-01-008 Version 2.0.0 Package Pin Number UT8R1M39 Signal Name UT8R2M39 Signal Name UT8R4M39 Signal Name Device Pin Description 61 NC NC NC NC 62 VSS VSS VSS PWR 63 A14 A14 A14 ADDRESS INPUT 64 A15 A15 A15 ADDRESS INPUT 65 A16 A16 A16 ADDRESS INPUT 66 BOT_DQ34 BOT_DQ34 BOT_DQ34 Data I/O1 67 BOT_DQ33 BOT_DQ33 BOT_DQ33 Data I/O1 68 BOT_DQ32 BOT_DQ32 BOT_DQ32 Data I/O1 69 DQ31 DQ31 DQ31 Data I/O 70 DQ30 DQ30 DQ30 Data I/O 71 DQ29 DQ29 DQ29 Data I/O 72 DQ28 DQ28 DQ28 Data I/O 73 VDD2 VDD2 VDD2 PWR1 74 VSS VSS VSS PWR 75 DQ27 DQ27 DQ27 Data I/O 76 DQ26 DQ26 DQ26 Data I/O 77 DQ25 DQ25 DQ25 Data I/O 78 DQ24 DQ24 DQ24 Data I/O 79 VDD1 VDD1 VDD1 PWR 80 VSS VSS VSS PWR 81 NC NC NC NC 82 VDD2 VDD2 VDD2 PWR 83 NC NC NC NC 84 VDD2 VDD2 VDD2 PWR 85 NC NC NC NC 86 VSS VSS VSS PWR 87 VDD1 VDD1 VDD1 PWR 88 DQ23 DQ23 DQ23 Data I/O 89 DQ22 DQ22 DQ22 Data I/O 90 DQ21 DQ21 DQ21 Data I/O -6- Cobham Semiconductor Solutions Aeroflex.com/Memories December 2015 Table 2. Device Option: Signal and Pin Description 36-00-01-008 Version 2.0.0 Package Pin Number UT8R1M39 Signal Name UT8R2M39 Signal Name UT8R4M39 Signal Name Device Pin Description 91 DQ20 DQ20 DQ20 Data I/O 92 VSS VSS VSS PWR 93 VDD2 VDD2 VDD2 PWR 94 DQ19 DQ19 DQ19 Data I/O 95 DQ18 DQ18 DQ18 Data I/O 96 DQ17 DQ17 DQ17 Data I/O 97 DQ16 DQ16 DQ16 Data I/O 98 BOT_DQ35 BOT_DQ35 BOT_DQ35 Data I/O1 99 TOP_DQ35 TOP_DQ35 TOP_DQ35 Data I/O1 100 BOT_DQ36 BOT_DQ36 BOT_DQ36 Data I/O1 101 TOP_DQ36 TOP_DQ36 TOP_DQ36 Data I/O1 102 A10 A10 A10 ADDRESS INPUT 103 A9 A9 A9 ADDRESS INPUT 104 A8 A8 A8 ADDRESS INPUT 105 A7 A7 A7 ADDRESS INPUT 106 VDD1 VDD1 VDD1 PWR 107 VSS VSS VSS PWR 108 A6 A6 A6 ADDRESS INPUT 109 W# W# W# CONTROL INPUT 110 A18 A18 A18 ADDRESS INPUT 111 NC NC NC NC 112 VDD1 VDD1 VDD1 PWR 113 NC NC NC NC 114 NC NC NC NC 115 VDD1 VDD1 VDD1 PWR 116 NC NC NC NC 117 VSS VSS VSS PWR 118 NC NC NC NC 119 NC NC NC NC 120 VDD1 VDD1 VDD1 PWR 121 NC NC NC NC -7- Cobham Semiconductor Solutions Aeroflex.com/Memories December 2015 Table 2. Device Option: Signal and Pin Description Package Pin Number UT8R1M39 Signal Name UT8R2M39 Signal Name UT8R4M39 Signal Name Device Pin Description 122 A17 A17 A17 ADDRESS INPUT 123 A5 A5 A5 ADDRESS INPUT 124 A4 A4 A4 ADDRESS INPUT 125 VSS VSS VSS PWR 126 VDD1 VDD1 VDD1 PWR 127 A3 A3 A3 ADDRESS INPUT 128 A2 A2 A2 ADDRESS INPUT 129 A1 A1 A1 ADDRESS INPUT 130 A0 A0 A0 ADDRESS INPUT 131 TOP_DQ37 TOP_DQ37 TOP_DQ37 Data I/O1 132 BOT_DQ37 BOT_DQ37 BOT_DQ37 Data I/O1 Notes: NC pins are not connected on the die. 1. Each TOP and BOT signal pin for DQ38 through DQ32 must be externally connected together by user. 2. Control input when declared as En#, otherwise pin is NC. 36-00-01-008 Version 2.0.0 -8- Cobham Semiconductor Solutions Aeroflex.com/Memories December 2015 minimum time between valid address changes is specified by the read cycle time (tAVAV1). DEVICE OPERATION The SRAMs have control inputs called Chip Enable (En), Write Enable (W), and Output Enable (G); 19 address inputs, A(18:0); and 39 bidirectional data lines, DQ(38:0). The En (chip enable) controls selection between active and standby modes. Asserting En enables the device, causes IDD to rise to its active value, and decodes the 19 address inputs. Only one chip enable may be active at anytime. W controls read and write operations. During a read cycle, G must be asserted to enable the outputs. SRAM Read Cycle 2, the Chip Enable-controlled Access in Figure 3b, is initiated by a single En going active while G remains asserted, W remains deasserted, and the addresses remain stable for the entire cycle. After the specified tETQV is satisfied, the 39-bit word addressed by A(18:0) is accessed and appears at the data outputs DQ(38:0). SRAM Read Cycle 3, the Output Enable-controlled Access in Figure 3c, is initiated by G going active while a single En is asserted, W is deasserted, and the addresses are stable. Read access time is tGLQV unless tAVQV or tETQV (reference Figure 3b) have not been satisfied. Table 2. SRAM Device Control Operation Truth Table G W En I/O Mode Mode X X H DQ(38:0) 3-State Standby DQ(38:0) Data Out Word Read L H L WRITE CYCLE H H L DQ(38:0) All 3-State Word Read2 X L L DQ(38:0) Data In Word Write A combination of W and a single En less than VIL(max) defines a write cycle. The state of G is a “don’t care” for a write cycle. The outputs are placed in the high-impedance state when either G is greater than VIH(min), or when W is less than VIL(max). Write Cycle 1, the Write Enable-controlled Access in Figure 4a, is defined by a write terminated by W going high, with a single En still active. The write pulse width is defined by tWLWH when the write is initiated by W, and by tETWH when the write is initiated by En. To avoid bus contention tWLQZ must be satisfied before data is applied to the 39 bidirectional pins DQ(38:0) unless the outputs have been previously placed in high impedance state by deasserting G. Notes: 1. “X” is defined as a “don’t care” condition. 2. Device active; outputs disabled. READ CYCLE A combination of W greater than VIH (min) with a single En and G less than VIL (max) defines a read cycle. Read access time is measured from the latter of device enable, output enable, or valid address to valid data output. Write Cycle 2, the Chip Enable-controlled Access in Figure 4b, is defined by a write terminated by a single En. The write pulse width is defined by tWLEF when the write is initiated by W, and by tETEF when the write is initiated by En going active. For the W initiated write, unless the outputs have been previously placed in the high-impedance state by G, the user must wait tWLQZ before applying data to the 39 bidirectional pins DQ(38:0) to avoid bus contention. SRAM Read Cycle 1, the Address Access in Figure 3a, is initiated by a change in address inputs after a single En is asserted, G is asserted, W is deasserted and are all stable. Valid data appears on data outputs DQ(38:0) after the specified tAVQV is satisfied. Outputs remain active throughout the entire cycle. As long as device enable and output enable are active, the 36-00-01-008 Version 2.0.0 -9- Cobham Semiconductor Solutions Aeroflex.com/Memories December 2015 Table 3. Operational Environment1 Total Dose 100K radsSi) Heavy Ion Error Rate2 7.3x10-7 Errors/Bit-Day Notes: 1. The SRAM is immune to latchup to particles <110MeV-cm2/mg. 2. 90% worst case particle environment, Geosynchronous orbit, 100 mils of Aluminum. SUPPLY SEQUENCING No supply voltage sequencing is required between VDD1 and VDD2. POWER-UP REQUIREMENTS During power-up of the SRAM devices, the power supply voltages will traverse through voltage ranges where the device is not guaranteed to operate before reaching final levels. Since some circuits on the device may operate at lower voltage levels than others, the device may power-up in an unknown state. To eliminate this with most power-up situations, the device employs an on-chip power-on-reset (POR) circuit. The POR, however, requires time to complete the operation. Therefore, it is recommended that all device activity be delayed by a minimum of 100ms, after both VDD1 and VDD2 supplies have reached their respective minimum operating voltages. EXTERNAL CONNECTION REQUIREMENTS Bidirectional data lines DQ38-DQ32 have both a TOP and BOT pinout. TOP and BOT for each data line must be externally connected together by user. 36-00-01-008 Version 2.0.0 - 10 - Cobham Semiconductor Solutions Aeroflex.com/Memories December 2015 ABSOLUTE MAXIMUM RATINGS1 (Referenced to VSS) SYMBOL PARAMETER LIMITS VDD1 DC supply voltage (Core) -0.3 to 2.1V VDD2 DC supply voltage (I/O) -0.3 to 3.8V VI/O Voltage on any pin -0.3 to 3.8V TSTG Storage temperature -65 to +150C PD2 Maximum package power dissipation permitted @ Tc = +105oC UT8R1M39 UT8R2M39 UT8R4M39 TJ JC3 UT8R1M39 UT8R2M39 UT8R4M39 II Maximum junction temperature 3.3W 2W 1.3W +150C Thermal resistance, junction-to-case2 6oC/W 10oC/W 15oC/W ±10 mA DC input current Notes: 1. Stresses outside the listed 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 limits indicated in the operational sections of this specification is not recommended. Exposure to absolute maximum rating conditions for extended periods may affect device reliability and performance. 2. Per MIL-STD-883, Method 1012, Section 3.4.1, PD = (125oC - 105oC) 3. JC varies with density due to stacked die configuration. JC RECOMMENDED OPERATING CONDITIONS SYMBOL 36-00-01-008 Version 2.0.0 PARAMETER LIMITS VDD1 DC supply voltage (Core) 1.7 to 2.0V VDD2 DC supply voltage (I/O) 2.3 to 3.6V TC Case temperature range -55C to +105C VIN DC input voltage 0V to VDD2 - 11 - Cobham Semiconductor Solutions Aeroflex.com/Memories December 2015 DC ELECTRICAL CHARACTERISTICS (Pre and Post-Radiation)* (VDD1 = 1.7V to 2.0V, VDD2 = 2.3V to 3.6V; Unless otherwise noted, Tc is per the temperature range ordered) SYMBOL PARAMETER VIH High-level input voltage VIL Low-level input voltage 0.8 V VOL1 Low-level output voltage IOL = 8mA, 3.0V<VDD2 < 3.6V 0.4 V VOL2 Low-level output voltage IOL = 6mA, 2.3V<VDD2 < 2.7V 0.2*VDD2 VOH1 High-level output voltage IOH = -4mA, 3.0V<VDD2 < 3.6V 0.8*VDD2 VOH2 High-level output voltage IOL = -2mA, 2.3V<VDD2 < 2.7V 0.8*VDD2 IIN Input leakage current VIN = VDD2 and VSS -2 2 A IOZ Three-state output leakage current VO = VDD2 and VSS VDD2 = VDD2 (max), G = VDD2 (max) -2 2 A IOS2,3 Short-circuit output current VDD2 = VDD2 (max), VO = VDD2 VDD2 = VDD2 (max), VO = VSS -100 +100 mA IDD1(OP1)5 VDD1 Supply current read operation @ 1MHz VDD1= 2.0V Inputs: VIL = VSS + 0.2V, VIH = VDD2 -0.2V, IOUT = 0 VDD2 = VDD2 (max) VDD1 = 1.9V 14 mA 10 mA VDD1 = 2.0V Inputs: VIL = VSS + 0.2V, VIH = VDD2 -0.2V, IOUT = 0 VDD1 = 1.9V VDD2 = VDD2 (max) UT8R4M39 230 215 mA mA VDD1 = 2.0V VDD1 = 1.9V UT8R1M39 UT8R2M39 225 210 mA mA IDD1(OP2)5,6 VDD1 Supply current read operation @ fmax CONDITION MIN MAX 2.2 UNIT V V IDD2(OP1)5 VDD2 Supply current read operation @ 1MHz Inputs : VIL = VSS + 0.2V, VIH = VDD2 -0.2V, IOUT = 0 VDD1 = VDD1 (max), VDD2 = VDD2 (max) 2 mA IDD2(OP2)5,6 VDD2 Supply current read operation @ fmax Inputs : VIL = VSS + 0.2V, VIH = VDD2 -0.2V, IOUT = 0 VDD1 = VDD1 (max), VDD2 = VDD2 (max) 5 mA 36-00-01-008 Version 2.0.0 - 12 - Cobham Semiconductor Solutions Aeroflex.com/Memories December 2015 SYMBOL PARAMETER IDD1(SB)4,7 Supply current standby @ 0Hz (per die) Supply current standby @ 0Hz (per die) IDD2(SB)7 IDD1(SB)4,6,7 IDD2(SB)6,7 CONDITION CMOS inputs, IOUT = 0 En = VDD2 -0.2 VDD1 = VDD1 (max), VDD2 = VDD2 (max) MAX UNIT -55oC and 25oC 15 mA 105oC 35 mA 3 mA -55oC and 25oC 15 mA 105oC 35 mA 3 mA CMOS inputs, IOUT = 0 En = VDD2 -0.2 VDD1 = VDD1 (max), VDD2 = VDD2 (max) Supply current standby CMOS inputs , IOUT = 0 A(16:0) @ fmax (per die) En = VDD2 - 0.2 VDD1 = VDD1 (max), VDD2 = VDD2 (max) Supply current standby A(16:0) @ fmax (per die) MIN CMOS inputs, IOUT = 0 En = VDD2 - 0.2 VDD1 = VDD1 (max), VDD2 = VDD2 (max) CAPACITANCE SYMBOL PARAMETER CONDITION UT8R1M39 MIN MAX UT8R2M39 MIN UT8R4M39 MAX MIN UNIT MAX CIN1 Input capacitance = 1MHz @ 0V 18 29 50 pF CEn1 Input capacitance Device Enables = 1MHz @ 0V 10 10 10 pF CIO1 Bidirectional I/O capacitance = 1MHz @ 0V 15 27 50 pF Bidirectional I/O capacitance = 1MHz @ 0V 10 20 32 pF DQ(31:0) CIO1 TOP and BOT DQ(38:32) Notes: * For devices procured with a total ionizing dose tolerance guarantee, the post-irradiation performance is guaranteed at 25oC per MIL-STD-883 Method 1019, Condition A up to the maximum TID level procured. 1. Measured only for initial qualification and after process or design changes that could affect this parameter. 2. Supplied as a design limit but not guaranteed nor tested. 3. Not more than one output may be shorted at a time for maximum duration of one second. 4. Post radiation limits are the 105oC temperature limit when specified. 5. Operating current limit does not include standby current. 6. fmax =50MHz. 7. VIH = VDD2 (max), VIL = 0V. 36-00-01-008 Version 2.0.0 - 13 - Cobham Semiconductor Solutions Aeroflex.com/Memories December 2015 AC CHARACTERISTICS READ CYCLE (Pre and Post-Radiation)* (VDD1 = 1.7V to 2.0V, VDD2 = 2.3V to 3.6V; Unless otherwise noted, Tc is per the temperature range ordered.) SYMBOL PARAMETER UT8R1M39 MIN MAX 20 UT8R2M39 MIN MAX 22 UT8R4M39 MIN MAX FIGURE ns 3a ns 3c tAVAV11 Read cycle time tAVQV Address to data valid from address change tAXQX2 Output hold time 3 3 3 ns 3a tGLQX1,2 G-controlled output enable time 2 2 2 ns 3c tGLQV G-controlled output data valid 10 ns 3c tGHQZ2 G-controlled output three-state time 2 8 ns 3c tETQX2 E-controlled output enable time 5 ns 3b tETQV E-controlled access time 25 ns 3b tEFQZ2 E-controlled output 7 ns 3b 20 22 8 25 8 6 2 6 5 20 2 25 UNIT 1 5 22 7 2 7 2 three-state time2 Notes: * For devices procured with a total ionizing dose tolerance guarantee, the post-irradiation performance is guaranteed at 25oC per MIL-STD-883 Method 1019, Condition A up to the maximum TID level procured 1. Guaranteed by characterization, but not tested. 2. Three-state is defined as a change from steady-state output voltage. 36-00-01-008 Version 2.0.0 - 14 - Cobham Semiconductor Solutions Aeroflex.com/Memories December 2015 tAVAV1 A(18:0) DQ(38:0) Previous Valid Data Valid Data tAVQV tAXQX Assumptions: 1. E and G < VIL (max) and W > VIH (min) Figure 3a. SRAM Read Cycle 1: Address Access A(18:0) En tETQV tEFQZ tETQX DQ(38:0) DATA VALID Assumptions: 1. G < VIL (max) and W > VIH (min) Figure 3b. SRAM Read Cycle 2: Chip Enable-Controlled Access tAVQV A(18:0) G tGHQZ tGLQX DATA VALID DQ(38:0) Assumptions: 1. E < VIL (max) and W > VIH (min) tGLQV Figure 3c. SRAM Read Cycle 3: Output Enable Access 36-00-01-008 Version 2.0.0 - 15 - Cobham Semiconductor Solutions Aeroflex.com/Memories December 2015 AC CHARACTERISTICS WRITE CYCLE (Pre and Post-Radiation)* (VDD1 = 1.7V to 2.0V, VDD2 = 2.3V to 3.6V; Unless otherwise noted, Tc is per the temperature range ordered.) SYMBOL PARAMETER UT8R1M39 UT8R2M39 UT8R4M39 MIN MIN MIN MAX MAX UNIT FIGURE MAX tAVAV21 Write cycle time 10 10 10 ns 4a/4b tETWH Device enable to end of write 10 10 10 ns 4a tAVET Address setup time for write (En- controlled) 0 0 0 ns 4b tAVWL Address setup time for write (W - controlled) 0 0 0 ns 4a tWLWH1 Write pulse width 8 8 8 ns 4a tWHAX Address hold time for write (W - controlled) 0 0 0 ns 4a tEFAX Address hold time for device enable (En- controlled) 0 0 0 ns 4b tWLQZ2 W - controlled three-state time ns 4a/4b tWHQX2 W - controlled output enable time 0 0 0 ns 4a tETEF Device enable pulse width (En - controlled) 10 10 10 ns 4b tDVWH Data setup time 5 5 6 ns 4a tWHDX Data hold time 0 0 0 ns 4a tWLEF1 Device enable controlled write pulse width 8 8 8 ns 4b tDVEF Data setup time 5 5 6 ns 4a/4b tEFDX Data hold time 0 0 0 ns 4b tAVWH Address valid to end of write 10 10 10 ns 4a Write disable time 2 2 3 ns 4a tWHWL1 7 7 9 Notes: * For devices procured with a total ionizing dose tolerance guarantee, the post-irradiation performance is guaranteed at 25oC per MIL-STD-883 Method 1019, Condition A up to the maximum TID level procured 1. Tested with G high. 2. Three-state is defined as a change from steady-state output voltage. 36-00-01-008 Version 2.0.0 - 16 - Cobham Semiconductor Solutions Aeroflex.com/Memories December 2015 A(18:0) tAVAV2 En tAVWH tETWH, tWLEF tWHWL W tAVWL tWLWH tWHAX Q(38:0) tWHQX tWLQZ D(38:0) APPLIED DATA Assumptions: 1. G < VIL (max). (If G > VIH (min) then Q(31:0) three-state for the entire cycle.) tDVWH, tDVEF tWHDX Figure 4a. SRAM Write Cycle 1: W - Controlled Access 36-00-01-008 Version 2.0.0 - 17 - Cobham Semiconductor Solutions Aeroflex.com/Memories December 2015 tAVAV2 A(18:0) tAVET tETEF tEFAX En tWLEF W APPLIED DATA D(38:0) tDVEF Q(38:0) tEFDX Assumptions & Notes: 1. G < VIL (max). (If G > VIH (min) then Q(31:0) three-state for the entire cycle.) Figure 4b. SRAM Write Cycle 2: Enable - Controlled Access 36-00-01-008 Version 2.0.0 - 18 - Cobham Semiconductor Solutions Aeroflex.com/Memories December 2015 DATA RETENTION CHARACTERISTICS (Pre and Post-Radiation)* (VDD2 = 2.3 to 3.6V, 1 second DR pulse) SYMBOL VDR IDDR 1 tEFR1,2 tR1,2 PARAMETER TEMP MINIMUM MAXIMUM UNIT -- 1.0 -- V -55C -- 3 mA 25C -- 3 mA 105C -- 23.5 mA Chip deselect to data retention time -- 0 -- ns Operation recovery time -- tAVAV1 tAVAV2 -- ns VDD1 for data retention Data retention current (per die) Notes: * Post-radiation performance guaranteed at 25C per MIL-STD-883 Method 1019. 1. En as shown all other inputs = VDD2 or VSS. 2. Guaranteed by design neither tested nor characterized. DATA RETENTION MODE 1.7V 1.7V VDR > 1.0V VDD1 tR tEFR En VIN >0.7VDD2 CMOS VIN <0.3VDD2 CMOS Figure 5. Low VDD Data Retention Waveform 36-00-01-008 Version 2.0.0 - 19 - Cobham Semiconductor Solutions Aeroflex.com/Memories December 2015 VDD VDD RTERM 100ohm CL = 40pF DUT Test Point Zo = 50ohm RTERM 100ohm VDD2 VSS 90% 90% 10% < 2ns 10% CMOS Input Pulses < 2ns Notes: 1. Measurement of data output occurs at the low to high or high to low transition mid-point (i.e., CMOS input = VDD2/2 Figure 6. AC Test Loads and Input Waveforms 36-00-01-008 Version 2.0.0 - 20 - Cobham Semiconductor Solutions Aeroflex.com/Memories December 2015 PACKAGING Figure 7. 132-Lead Side-Brazed Dual Cavity Ceramic Quad Flatpack 36-00-01-008 Version 2.0.0 - 21 - Cobham Semiconductor Solutions Aeroflex.com/Memories December 2015 ORDERING INFORMATION 40Mbit (1Mx39) SRAM MCM 80Mbit (2Mx39) SRAM MCM 160Mbit (4Mx39) SRAM MCM UT ****** - * * * * * Lead Finish: (Note 1) (C) = Gold Screening: (Notes 2, 3) (F) = HiRel Flow (P) = Prototype Flow (Temperature Range: -55C to +105C) (Temperature Range: 25oC only) Package Type: (X) = 132-lead ceramic quad flatpack, side-brazed, dual cavit y Access Time: (Note 4) (21) = 20ns read / 10ns write access times, 40Mbit device type (22) = 22ns read / 10ns writeaccess times, 80Mbit device type (25) = 25ns read / 10ns write access times, 160Mbit device type Device Type: (8R1M39) = 40Mbit (1Mx39) SRAM MCM (8R2M39) = 80Mbit (2Mx 39) SRAM MCM (8R4M39) = 160Mbit (4Mx39) SRAM MCM Notes: 1. Lead finish is "C" (Gold) only. 2. Prototype Flow per Aeroflex Manufacturing Flows Document. Devices are tested at 25oC only. Lead finish is GOLD "C" only. Radiation is neither tested nor guaranteed. 3. HiRel flow per Aeroflex Manufacturing Flows Document. Radiation is neither tested nor guaranteed. 4. Device option (21) applicable to 40Mbit device type only. Option (22) applicable to 80Mbit device type only. Option (25) applicable to 160Mbit device type only. 36-00-01-008 Version 2.0.0 - 22 - Cobham Semiconductor Solutions Aeroflex.com/Memories December 2015 40Mbit (1Mx39) SRAM MCM: SMD 80Mbit (2Mx39) SRAM MCM: SMD 160Mbit (4Mx39) SRAM MCM: SMD 5962 * ***** ** * * * Lead Finish: (Note 1) (C) = Gold Case Outline: (X) = 132-lead ceramic quad flatpack, side brazed, dual cavity Class Designator: (Q) = QML Class Q (V) = QML Class V (10205 and 10206 device options only) Device Type: (Note 2) (01) = Temperature Range (-55C to +105C) (02) = Assembled to Aeroflex Q+ Flow (Temperature Range -55C to +105C) Drawing Number: (10205) = 40Mbit (1Mx39) SRAM MCM (10206) = 80Mbit (2Mx39) SRAM MCM (10207) = 160Mbit (4Mx39)SRAM MCM Total Dose: (Note 3) (R) = 100 krad(Si) Federal Stock Class Designator: No options Notes: 1. Lead finish is "C" (Gold) only. 2. Aeroflex’s Q+ assembly flow, as defined in section 4.2.2.d of the SMD, provides QML-Q product through the SMD that is manufactured with Aeroflex’s standard QML-V flow and has completed QML-V qualification per MIL-PRF-38535. 3. TID tolerance guarantee of 1E5 is tested in accordance with MIL-STD-883 Test Method 1019 (condition A and section 3.11.2) resulting in an effective dose rate of 1 rad(Si)/sec. 36-00-01-008 Version 2.0.0 - 23 - Cobham Semiconductor Solutions Aeroflex.com/Memories June 2015 Aer of l e x Col or a do Sp r i ngs - Dat as he et De f i ni t i on Ad va nc e d Da ta sh ee t - P r odu ct I n De v el op me nt P r el i m i n a ry Da t a s h e et - S h i p p in g P ro t o t yp e Da ta s he et - S hi pp in g Q ML & R e duc e d Hi -R el This product is controlled for export under the Export Administration Regulations (EAR), 15 CFR Parts 730-774. A license from the Department of Commerce may be required prior to the export of this product from the United States. Cobham Semiconductor Solutions 4350 Centennial Blvd Colorado Springs, CO 80907 E: [email protected] T: 800 645 8862 Aeroflex Colorado Springs Inc., DBA Cobham Semiconductor Solutions, reserves the right to make changes to any products and services described herein at any time without notice. Consult Aeroflex or an authorized sales representative to verify that the information in this data sheet is current before using this product. Aeroflex does not assume any responsibility or liability arising out of the application or use of any product or service described herein, except as expressly agreed to in writing by Aeroflex; nor does the purchase, lease, or use of a product or service from Aeroflex convey a license under any patent rights, copyrights, trademark rights, or any other of the intellectual rights of Aeroflex or of third parties. 36-00-01-008 Version 2.0.0 - 24 - Cobham Semiconductor Solutions Aeroflex.com/Memories December 2015 DATA SHEET REVISION HISTORY Page(s) REV Revision Date 1.0.0 6/15 Added new datasheet format All Leslie 2.0.0 12/15 Added new Table 1, edited notes on Figures 4a and 4b, updated export disclaimer 3, 17,18, 25 Leslie 36-00-01-008 Version 2.0.0 Description of Change - 25 - Author Cobham Semiconductor Solutions Aeroflex.com/Memories Aeroflex Colorado Springs Application Note AN-MEM-002 Low Power SRAM Read Operations Table 1: Cross Reference of Applicable Products Manufacturer Part Number SMD # Device Type Internal PIC Number:* 4M Asynchronous SRAM UT8R128K32 5962-03236 01 & 02 WC03 4M Asynchronous SRAM UT8R512K8 5962-03235 01 & 02 WC01 16M Asynchronous SRAM UT8CR512K32 5962-04227 01 & 02 MQ08 16M Asynchronous SRAM UT8ER512K32 5962-06261 05 & 06 WC04/05 4M Asynchronous SRAM UT8Q512E 5962-99607 05 & 06 WJ02 4M Asynchronous SRAM UT9Q512E 5962-00536 05 & 06 WJ01 16M Asynchronous SRAM UT8Q512K32E 5962-01533 02 & 03 QS04 16M Asynchronous SRAM UT9Q512K32E 5962-01511 02 & 03 QS03 32M Asynchronous SRAM UT8ER1M32 5962-10202 01 - 04 QS16/17 64M Asynchronous SRAM UT8ER2M32 5962-10203 01 - 04 QS09/10 128M Asynchronous SRAM UT8ER4M32 5962-10204 01 - 04 QS11/12 40M Asynchronous SRAM UT8R1M39 5962-10205 01 & 02 QS13 80M Asynchronous SRAM UT8R2M39 5962-10206 01 & 02 QS14 160M Asynchronous SRAM UT8R4M39 5962-10207 01 & 02 QS15 Product Name: * PIC = Aeroflex’s internal Product Identification Code 1.0 Overview The purpose of this application note is to discuss the Aeroflex SRAMs low power read architecture and to inform users of the affects associated with the low power read operations. 2.0 Low Power Read Architecture The aforementioned Aeroflex designed SRAMs all employ an architecture which reduces power consumption during read accesses. The architecture internally senses data only when new data is requested. A request for new data occurs anytime the chip enable device pin is asserted, or any of the device address inputs transition states while the chip enable is asserted. A trigger is generated and sent to the sensing circuit anytime a request for new data is observed. Since several triggers could occur simultaneously, these triggers are wire-ORed to result in a single sense amplifier activity for the read request. This design method results in less power consumption than designs that continually sense data. Aeroflex’s low power SRAMs listed above activate the sensing circuit for approximately 5ns whenever and access is requested, thereby, significantly reducing active power. Creation Date: 8/19/11 Page 1 of 5 Modification Date: 4/24/13 Aeroflex Colorado Springs Application Note AN-MEM-002 2.1 The SRAM Read Cycles. The data sheets for all the devices noted in Table #1 discuss three methods for performing a read operation. The two most common methods for reading data are an Address Access and a Chip Enabled-Controlled Access. The third access discussed is the Output Enable-Controlled Access. The sequence at which control lines and address inputs are toggled determines which cycle is considered relevant. As discussed in section 2.0, an assertion of chip enable or any address transition while chip enable is asserted, initiates a read cycle. If the device chip enable is asserted prior to any address input transitions, then the read access is considered an Address Access. By keeping the device enabled and repeatedly switching address locations, the user retrieves all data of interest. A Chip Enable-Controlled Access occurs when the address signals are stable prior to asserting the chip enable. The Output Enabled-Controlled Access requires that either an Address Access or Chip Enable-Controlled Access has already been performed and the data is waiting for the Output Enable pin to assert, driving data to the device I/O pins. The subsequent read cycle verbiage and diagrams are based on the Aeroflex UT8R512K8 data sheet. The number of control, input, and I/O pins will vary across the products listed in Table 1. The basic design family functionality for read operations is common among all the devices. 2.1.0 Address Access Read Cycle The Address Access is initiated by a change in address inputs while the chip is enabled with G asserted and W deasserted. Valid data appears on data outputs DQ(7:0) after the specified tAVQV is satisfied. Outputs remain active throughout the entire cycle. As long as chip enable and output enable are active, the address inputs may change at a rate equal to the minimum read cycle time (tAVAV). tAVAV A(18:0) DQ(7:0) Previous Valid Data Valid Data tAVQV Assumptions: 1. E1 and G < VIL (max) and E2 and W > VIH (min) tAXQX Note: No time references are relevant with respect to Chip Enable(s). Chip Enable(s) is assumed to be asserted. SRAM Read Cycle 1: Address Access Creation Date: 8/19/11 Page 2 of 5 Modification Date: 4/24/13 Aeroflex Colorado Springs Application Note AN-MEM-002 2.1.1 Chip Enable-Controlled Read Cycle The Chip Enable-controlled Access is initiated by E1 and E2 going active while G remains asserted, W remains deasserted, and the addresses remain stable for the entire cycle. After the specified tETQV is satisfied, the eight-bit word addressed by A(18:0) is accessed and appears at the data outputs DQ(7:0). A(18:0) E1 low or E2 high tETQV tETQX DQ(7:0) tEFQZ DATA VALID Assumptions: 1. G < VIL (max) and W > VIH (min) Note: No specification is given for address set-up time with respect to chip enable assertion. The read cycle description states that addresses are to remain stable for the entire cycle. Address set-up time relative to chip enable is assumed to be 0ns minimum. SRAM Read Cycle 2: Chip Enable Access 2.1.1 Output Enabled-Controlled Read Cycle The Output Enable-controlled Access is initiated by G going active while E1 and E2 are asserted, W is deasserted, and the addresses are stable. Read access time is tGLQV unless tAVQV or tETQV have not been satisfied. tAVQV A(18:0) G tGHQZ tGLQX DATA VALID DQ(7:0) tGLQV Assumptions: 1. E1 < VIL (max) , E2 > and W > VIH (min) SRAM Read Cycle 3: Output Enable Access 3.0 Low Power Read Architecture Timing Consideration The low power read architecture employed by Aeroflex designed SRAMs results in significant power reduction, especially in applications with longer than minimum read cycle times. However, this type of architecture is responsive to excessive input signal skew when device addressing and chip enable assertion occur simultaneously. Signal skew of greater than 4-5ns between all of the read triggering activities is sufficient to start another read cycle. Creation Date: 8/19/11 Page 3 of 5 Modification Date: 4/24/13 Aeroflex Colorado Springs Application Note AN-MEM-002 3.1 Simultaneous Control and Address Switching Simultaneous switching of controls and address pins, alone, is not a problem; excessive skew between them is the concern. Consider the application where several SRAM devices are connected to the same memory bus. The address bus is commonly connected to all the devices, but the chip enable pin is singularly connected to each individual SRAM. This configuration results in a loading difference between the address inputs and the chip enable. This lightly loaded chip enable propagates to the memory more quickly than the heavily loaded address lines. The oscilloscope capture of Figure #1 is the actual timing of an application which had intermittent data errors due to address transitions lagging chip enable. Address Signal (Ax) Chip Enable (/E) Timing shown from VIL (yellow trace /CS) and VIH (pink for address signal) as delta X = 6ns. Even at actual internal gate switching point (~ VDD/2), the skew is still around 6ns. Figure #1 SRAM Signal Capture The signal transitions in the scope plot of Figure #1 appear to be fairly coincidental. A closer look however, reveals the chip enable signal actually starts and reaches VIL approximately 6ns before the address signal reaches VIH. Even at one half VDD (closer to actual logical gate switching of the inputs), the delta in signal times is still approximately 6ns. Simultaneous switching of controls and address inputs is not recommended for a couple of reasons. The first is the previously described signal skew sensitivity between controls and/or address inputs. The second reason is that activating all the controls and address inputs simultaneously results in peak instantaneous current consumption. This condition causes maximum strain to the power decoupling. Chip Enable activates address decoding circuits, address switching introduces input buffer switching current, and output enable assertion turns on all the device output drivers. Peforming all three simultaneously results in worst case transient current demand by the memory. 3.1.0 Technical Overview of Skew Sensitivity Recall from section 2.0 that any activity requesting new data causes a read trigger. The triggers are wire-ORed together. In order to meet the faster access times demanded by today’s applications, the ORed trigger only exists during the first 4-5ns of the read cycle. Since the slowest of the address transitions occurs more than 5ns after the initiation of the read activity, a second read activity is initiated. The sensing circuit does not have time to normalize before the second read activity has started. For this reason a Chip Enable-Controlled read cycle requires that address inputs remain stable for the entire cycle. Infrequent and random sensing errors can result if the bit columns are continually pulled to one state then quickly requested to sense the opposite state. Another effect of the low power read architecture that differs from previous generation designs (those that continually sense for data) is that the bit line will not be sensed again until another read triggering event occurs. If another read trigger event (chip enable assertion and/or address change) does no occur for a particular address, the incorrect data remains at the outputs. Creation Date: 8/19/11 Page 4 of 5 Modification Date: 4/24/13 Aeroflex Colorado Springs Application Note AN-MEM-002 4.0 Summary and Conclusion The Aeroflex SRAMs in Table #1 all employ a low power consumption read architecture. Power is conserved by sensing data only when new data is requested. A request occurs anytime chip enable is asserted or any address input signal transitions while chip enable is asserted. The data sheets for the SRAMs listed in Table #1 do not explicitly define the case of simultaneous switching of address and control signals during read operations. Data sheet read cycle descriptions indicate that control inputs are established prior to address changes, and address inputs are stable prior to control assertions. Simultaneous switching of addresses and controls is tolerable, when the skew between all input signals is < 4ns. For designs that must employ the simultaneous activation of address and control signals, two important issues should be considered by the designer. The first is the input signal skew sensitivity of the low power read architecture discussed by this application note. The second is the instantaneous current consumption that results from simultaneous access methods. Aeroflex recommends the use of only one read access method at a time. If multiple read accesses (simultaneous chip enable assertion and address switching) cannot be avoided, then Aeroflex recommends that the chip enable signal be delayed until all addresses have completed transitions. Creation Date: 8/19/11 Page 5 of 5 Modification Date: 4/24/13