MOTOROLA Order this document by MCM6708A/D SEMICONDUCTOR TECHNICAL DATA MCM6708A 64K x 4 Bit Static RAM The MCM6708A is a 262,144 bit static random access memory organized as 65,536 words of 4 bits, fabricated using high–performance silicon–gate BiCMOS technology. Static design eliminates the need for external clocks or timing strobes. The MCM6708A is available in a 300 mil, 24 lead plastic surface–mount SOJ package. • • • • • J PACKAGE 300 MIL SOJ CASE 810A–02 Single 5 V ± 10% Power Supply Fully Static — No Clock or Timing Strobes Necessary All Inputs and Outputs are TTL Compatible Three State Outputs Fast Access Times: MCM6708A–8 = 8 ns MCM6708A–10 = 10 ns MCM6708A–12 = 12 ns PIN ASSIGNMENT A0 1 24 A1 2 23 VCC A15 A2 3 22 A14 A3 4 21 A13 A4 5 20 A12 A5 6 19 A11 A A6 7 18 A10 A A7 8 17 DQ0 A8 9 16 DQ1 A9 10 15 DQ2 E 11 14 DQ3 VSS 12 13 W BLOCK DIAGRAM A A MEMORY MATRIX 256 ROWS x 256 x 4 COLUMNS ROW DECODER A A A A DQ0 • • • • • • COLUMN I/O • • • INPUT DATA CONTROL COLUMN DECODER DQ3 A A A A A A A A PIN NAMES A0 – A15 . . . . . . . . . . . Address Inputs W . . . . . . . . . . . . . . . . . . . Write Enable E . . . . . . . . . . . . . . . . . . . . . Chip Enable DQ0 – DQ3 . . . . . . . Data Input/Output VCC . . . . . . . . . . . + 5 V Power Supply VSS . . . . . . . . . . . . . . . . . . . . . . Ground NC . . . . . . . . . . . . . . . . No Connection E W REV 5 5/95 Motorola, Inc. 1995 MOTOROLA FAST SRAM MCM6708A 2–1 TRUTH TABLE (X = Don’t Care) E G W Mode Output Cycle H X X Not Selected High–Z — L H H Read High–Z — L L H Read Dout Read Cycle L X L Write Din Write Cycle ABSOLUTE MAXIMUM RATINGS (See Note) Rating Symbol Value Unit VCC – 0.5 to + 7.0 V Vin, Vout – 0.5 to VCC + 0.5 V Output Current (per I/O) Iout ± 30 mA Power Dissipation PD 2.0 W Temperature Under Bias Tbias – 10 to + 85 °C Operating Temperature TA 0 to + 70 °C Power Supply Voltage Voltage Relative to VSS for Any Pin Except VCC Tstg – 55 to + 125 °C NOTE: Permanent device damage may occur if ABSOLUTE MAXIMUM RATINGS are exceeded. Functional operation should be restricted to RECOMMENDED OPERATING CONDITIONS. Exposure to higher than recommended voltages for extended periods of time could affect device reliability. Storage Temperature — Plastic This device contains circuitry to protect the inputs against damage due to high static voltages or electric fields; however, it is advised that normal precautions be taken to avoid application of any voltage higher than maximum rated voltages to this high–impedance circuit. This BiCMOS memory circuit has been designed to meet the dc and ac specifications shown in the tables, after thermal equilibrium has been established. The circuit is in a test socket or mounted on a printed circuit board and transverse air flow of at least 500 linear feet per minute is maintained. DC OPERATING CONDITIONS AND CHARACTERISTICS (VCC = 5.0 V ± 10%, TA = 0 to 70°C, Unless Otherwise Noted) RECOMMENDED OPERATING CONDITIONS Symbol Min Typ Max Unit Supply Voltage (Operating Voltage Range) Parameter VCC 4.5 5.0 5.5 V Input High Voltage VIH 2.2 — VCC + 0.3* V — 0.8 V Symbol Min Max Unit Input Leakage Current (All Inputs, Vin = 0 to VCC) Ilkg(I) — ± 1.0 µA Output Leakage Current (E = VIH, Vout = 0 to VCC) Input Low Voltage VIL – 0.5** * VIH (max) = VCC + 0.3 V dc; VIH (max) = VCC + 2.0 V ac (pulse width ≤ 2.0 ns) or I ≤ 30.0 mA. ** VIL (min) = – 0.5 V dc @ 30.0 mA; VIL (min) = – 2.0 V ac (pulse width ≤ 2.0 ns) or I ≤ 30.0 mA. DC CHARACTERISTICS Parameter Ilkg(O) — ± 1.0 µA Output High Voltage (IOH = – 4.0 mA) VOH 2.4 — V Output Low Voltage (IOL = 8.0 mA) VOL — 0.4 V POWER SUPPLY CURRENTS Parameter Symbol MCM6708A–8 MCM6708A–10 MCM6708A–12 Unit Notes AC Active Supply Current (Iout = 0 mA, VCC = max, f = fmax) ICCA 185 175 165 mA 1, 2, 3 AC Standby Current (E = VIH, VCC = max, f = fmax) ISB1 120 110 105 mA 1, 2, 3 CMOS Standby Current (VCC = max, f = 0 MHz, E ≥ VCC – 0.2 V, Vin ≤ VSS, or ≥ VCC – 0.2 V) ISB2 50 50 50 mA NOTES: 1. Reference AC Operating Conditions and Characteristics for input and timing (VIH/VIL, tr/tf, pulse level 0 to 3.0 V, VIH = 3.0 V). 2. All addresses transition simultaneously low (LSB) and then high (MSB). 3. Data states are all zero. MCM6708A 2–2 MOTOROLA FAST SRAM CAPACITANCE (f = 1.0 MHz, dV = 3.0 V, TA = 25°C, Periodically Sampled Rather Than 100% Tested) Symbol Max Unit Address Input Capacitance Cin 5 pF Control Pin Input Capacitance (E, G, W) Cin 5 pF Input/Output Capacitance CI/O 6 pF Parameter AC OPERATING CONDITIONS AND CHARACTERISTICS (VCC = 5.0 V ± 10%, TA = 0 to + 70°C, Unless Otherwise Noted) Input Timing Measurement Reference Level . . . . . . . . . . . . . . . 1.5 V Input Pulse Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to 3.0 V Input Rise/Fall Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 ns Output Timing Measurement Reference Level . . . . . . . . . . . . . 1.5 V Output Load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Figure 1A READ CYCLES 1 AND 2 (See Notes 1 and 2) MCM6708A–8 Parameter MCM6708A–10 MCM6708A–12 Symbol Min Max Min Max Min Max Unit Notes Read Cycle Time tAVAV 8 — 10 — 12 — ns 3 Address Access Time tAVQV — 8 — 10 — 12 ns Chip Enable Access Time tELQV — 8 — 10 — 12 ns Output Hold from Address Change tAXQX 3 — 3 — 3 — ns Chip Enable Low to Output Active tELQX 1 — 1 — 1 — ns 4, 5, 6 Chip Enable High to Output High–Z tEHQZ 0 4.5 0 5 0 6 ns 4, 5, 6 NOTES: 1. W is high for read cycle. 2. Product sensitivities to noise require proper grounding and decoupling of power supplies as well as minimization or elimination of bus contention conditions during read and write cycles. 3. All read cycle timings are referenced from the last valid address to the first transitioning address. 4. At any given voltage and temperature, tEHQZ max is less than tELQX min for a given device and from device to device. 5. Transition is measured 200 mV from steady–state voltage with load of Figure 1B. 6. This parameter is sampled and not 100% tested. AC TEST LOADS TIMING LIMITS +5 V 480 Ω OUTPUT Z0 = 50 Ω RL = 50 Ω OUTPUT 255 Ω 5 pF VL = 1.5 V Figure 1A MOTOROLA FAST SRAM Figure 1B The table of timing values shows either a minimum or a maximum limit for each parameter. Input requirements are specified from the external system point of view. Thus, address setup time is shown as a minimum since the system must supply at least that much time (even though most devices do not require it). On the other hand, responses from the memory are specified from the device point of view. Thus, the access time is shown as a maximum since the device never provides data later than that time. MCM6708A 2–3 READ CYCLE 1 (See Note) tAVAV A (ADDRESS) tAXQX Q (DATA OUT) PREVIOUS DATA VALID DATA VALID tAVQV NOTE: Device is continuously selected (E = VIL, G = VIL). READ CYCLE 2 (See Note) tAVAV A (ADDRESS) tELQV E (CHIP ENABLE) tEHQZ tELQX DATA VALID Q (DATA OUT) tAVQV NOTE: Addresses valid prior to or coincident with E going low. MCM6708A 2–4 MOTOROLA FAST SRAM WRITE CYCLE 1 (W Controlled, See Notes 1 and 2) MCM6708A–8 Parameter MCM6708A–10 MCM6708A–12 Symbol Min Max Min Max Min Max Unit Notes Write Cycle Time tAVAV 8 — 10 — 12 — ns 3 Address Setup Time tAVWL 0 — 0 — 0 — ns Address Valid to End of Write tAVWH 8 — 9 — 10 — ns Write Pulse Width tWLWH, tWLEH 8 — 9 — 10 — ns Data Valid to End of Write tDVWH 4 — 5 — 6 — ns Data Hold Time tWHDX 0 — 0 — 0 — ns Write Low to Data High–Z tWLQZ 0 4 0 5 0 6 ns 4, 5, 6 Write High to Output Active tWHQX 3 — 3 — 3 — ns 4, 5, 6 Write Recovery Time tWHAX 0 — 0 — 0 — ns NOTES: 1. A write occurs during the overlap of E low and W low. 2. Product sensitivities to noise require proper grounding and decoupling of power supplies as well as minimization or elimination of bus contention conditions during read and write cycles. 3. All write cycle timing is referenced from the last valid address to the first transitioning address. 4. Transition is measured 200 mV from steady state voltage with load of Figure 1B. 5. This parameter is sampled and not 100% tested. 6. At any given voltage and temperature, tWLQZ max is less than tWHQX min both for a given device and from device to device. WRITE CYCLE 1 tAVAV A (ADDRESS) tAVWH tWHAX E (CHIP ENABLE) tWLWH tWLEH W (WRITE ENABLE) tAVWL tDVWH DATA VALID D (DATA IN) tWLQZ Q (DATA OUT) MOTOROLA FAST SRAM tWHDX HIGH–Z tWHQX HIGH–Z MCM6708A 2–5 WRITE CYCLE 2 (E Controlled, See Notes 1 and 2) MCM6708A–8 Parameter MCM6708A–10 MCM6708A–12 Symbol Min Max Min Max Min Max Unit Notes Write Cycle Time tAVAV 8 — 10 — 12 — ns 3 Address Setup Time tAVEL 0 — 0 — 0 — ns Address Valid to End of Write tAVEH 8 — 9 — 10 — ns Chip Enable to End of Write tELEH, tELWH 7 — 8 — 9 — ns Data Valid to End of Write tDVEH 4 — 5 — 6 — ns Data Hold Time tEHDX 0 — 0 — 0 — ns 4, 5 Write Recovery Time tEHAX 0 — 0 — 0 — ns NOTES: 1. A write occurs during the overlap of E low and W low. 2. Product sensitivities to noise require proper grounding and decoupling of power supplies as well as minimization or elimination of bus contention conditions during read and write cycles. 3. All write cycle timing is referenced from the last valid address to the first transitioning address. 4. If E goes low coincident with or after W goes low, the output will remain in a high impedance condition. 5. If E goes high coincident with or before W goes high, the output will remain in a high impedance condition. WRITE CYCLE 2 tAVAV A (ADDRESS) tAVEH tELEH E (CHIP ENABLE) tAVEL tELWH tEHAX W (WRITE ENABLE) tDVEH DATA VALID D (DATA IN) tEHDX Q (DATA OUT) MCM6708A 2–6 HIGH–Z MOTOROLA FAST SRAM PACKAGE DIMENSIONS J PACKAGE 300 MIL SOJ CASE 810A–02 NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. DIMENSIONS A AND B DO NOT INCLUDE MOLD PROTRUSION. MOLD PROTRUSION SHALL NOT EXCEED 0.15 (0.006) PER SIDE. 3. CONTROLLING DIMENSION: INCH. 4. DIMENSION R TO BE DETERMINED AT DATUM -T-. F 24 13 1 DETAIL Z N D 24 PL 0.18 (0.007) 12 T A S H BRK -A- 0.18 (0.007) P -B- L G M M M E 0.10 (0.004) K DETAIL Z -T- SEATING PLANE R 0.25 (0.010) S RAD S T B S C S T B S DIM A B C D E F G H K L M N P R S INCHES MIN MAX 0.620 0.630 0.295 0.305 0.128 0.148 0.015 0.020 0.088 0.098 0.026 0.032 0.050 BSC — 0.020 0.035 0.045 0.025 BSC 0_ 5_ 0.030 0.045 0.335 0.345 0.260 0.280 0.030 0.040 MILLIMETERS MIN MAX 15.75 16.00 7.50 7.74 3.26 3.75 0.39 0.50 2.24 2.48 0.67 0.81 1.27 BSC — 0.50 0.89 1.14 0.64 BSC 0_ 5_ 0.76 1.14 8.51 8.76 6.61 7.11 0.77 1.01 M MOTOROLA FAST SRAM MCM6708A 2–7 ORDERING INFORMATION (Order by Full Part Number) MCM 6708A X XX XX Motorola Memory Prefix Shipping Method (R2 = Tape and Reel, Blank = Rails) Part Number Speed (8 = 8 ns, 10 = 10 ns, 12 = 12 ns) Package (J = 300 mil SOJ) Full Part Numbers — MCM6708AJ8 MCM6708AJ10 MCM6708AJ12 MCM6708AJ8R2 MCM6708AJ10R2 MCM6708AJ12R2 Motorola reserves the right to make changes without further notice to any products herein. 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Ltd.; Silicon Harbour Center, No. 2 Dai King Street, Tai Po Industrial Estate, Tai Po, N.T., Hong Kong. MCM6708A 2–8 ◊ *MCM6708A/D* MCM6708A/D MOTOROLA FAST SRAM