SN54/74LS670 4 x 4 REGISTER FILE WITH 3-STATE OUTPUTS The TTL / MSI SN54 / 74LS670 is a high-speed, low-power 4 x 4 Register File organized as four words by four bits. Separate read and write inputs, both address and enable, allow simultaneous read and write operation. The 3-state outputs make it possible to connect up to 128 outputs to increase the word capacity up to 512 words. Any number of these devices can be operated in parallel to generate an n-bit length. The SN54 / 74LS170 provides a similar function to this device but it features open-collector outputs. • • • • • Simultaneous Read/ Write Operation Expandable to 512 Words by n-Bits Typical Access Time to 20 ns 3-State Outputs for Expansion Typical Power Dissipation of 125 mW 4 x 4 REGISTER FILE WITH 3-STATE OUTPUTS LOW POWER SCHOTTKY J SUFFIX CERAMIC CASE 620-09 16 1 CONNECTION DIAGRAM DIP (TOP VIEW) N SUFFIX PLASTIC CASE 648-08 16 1 NOTE: The Flatpak version has the same pinouts (Connection Diagram) as the Dual In-Line Package. D SUFFIX SOIC CASE 751B-03 16 1 ORDERING INFORMATION PIN NAMES HIGH D1 – D4 WA, WB EW RA, RB ER Q1 – Q4 SN54LSXXXJ SN74LSXXXN SN74LSXXXD LOADING (Note a) Data Inputs Write Address Inputs Write Enable (Active LOW) Input Read Address Inputs Read Enable (Active LOW) Input Outputs (Note b) 0.5 U.L. 0.5 U.L. 1.0 U.L. 0.5 U.L. 1.5 U.L. 65 (25) U.L. LOW 0.25 U.L. 0.25 U.L. 0.5 U.L. 0.25 U.L. 0.75 U.L. 15 (7.5) U.L. NOTES: a) 1 TTL Unit Load (U.L.) = 40 µA HIGH/1.6 mA LOW. b) The Output LOW drive factor is 7.5 U.L. for Military (54) and 15 U.L. for Commercial (74) Temperature Ranges. The Output HIGH drive factor is 25 U.L. for Military and 65 U.L. for Commercial Temperature Ranges. Ceramic Plastic SOIC LOGIC SYMBOL FAST AND LS TTL DATA 5-597 SN54/74LS670 LOGIC DIAGRAM FAST AND LS TTL DATA 5-598 SN54/74LS670 GUARANTEED OPERATING RANGES Symbol Parameter Min Typ Max Unit VCC Supply Voltage 54 74 4.5 4.75 5.0 5.0 5.5 5.25 V TA Operating Ambient Temperature Range 54 74 – 55 0 25 25 125 70 °C IOH Output Current — High 54 74 –1.0 –2.6 mA IOL Output Current — Low 54 74 12 24 mA DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified) Limits Symbol Min Parameter VIH Input HIGH Voltage VIL Input LOW Voltage VIK Input Clamp Diode Voltage VOH Output HIGH Voltage VOL Output LOW Voltage IOZH Typ Max Unit 2.0 V Guaranteed Input HIGH Voltage for All Inputs V Guaranteed Input LOW Voltage for All Inputs V VCC = MIN, IIN = – 18 mA 0.7 54 0.8 74 – 0.65 – 1.5 Test Conditions 54 2.4 3.4 V 74 2.4 3.1 V VCC = MIN, IOH = MAX, VIN = VIH or VIL per Truth Table VCC = VCC MIN, VIN = VIL or VIH per Truth Table 54, 74 0.25 0.4 V IOL = 12 mA 74 0.35 0.5 V IOL = 24 mA Output Off Current HIGH 20 µA VCC = MAX, VO = 2.7 V IOZL Output Off Current LOW –20 µA VCC = MAX, VO = 0.4 V 20 40 60 µA VCC = MAX, VIN = 2.7 V IIH Input HIGH Current D, R, W EW ER mA VCC = MAX, VIN = 7.0 V mA VCC = MAX, VIN = 0.4 V – 130 mA VCC = MAX 50 mA VCC = MAX D, R, W EW ER IIL Input LOW Current D, R, W EW ER IOS Short Circuit Current (Note 1) ICC Power Supply Current 0.1 0.2 0.3 – 0.4 – 0.8 –1.2 – 30 Note 1: Not more than one output should be shorted at a time, nor for more than 1 second. FAST AND LS TTL DATA 5-599 SN54/74LS670 AC CHARACTERISTICS (TA = 25°C) Limits Symbol Parameter Min Typ Max Unit Test Conditions tPLH tPHL Propagation Delay, RA or RB to Output 23 25 40 45 ns tPLH tPHL Propagation Delay, EW to Output 26 28 45 50 ns tPLH tPHL Propagation Delay, Data to Output 25 23 45 40 ns tPZH tPZL Output Enable Time 15 22 35 40 ns tPLZ tPHZ Output Disable Time 16 30 35 50 ns CL = 5.0 pF Max Unit Test Conditions VCC = 5.0 V, CL = 45 pF AC SETUP REQUIREMENTS (TA = 25°C) Limits Symbol Parameter Min Typ tW Pulse Width 25 ns ts Setup Time, (D) 10 ns ts Setup Time, (W) 15 ns th Hold Time, (D) 15 ns th Hold Time, (W) 5.0 ns trec Recovery Time 25 ns VCC = 5.0 V AC WAVEFORMS Figure 2 Figure 1 Figure 3 FAST AND LS TTL DATA 5-600 Case 751B-03 D Suffix 16-Pin Plastic SO-16 -A- "! ! " " ! " # 1 %# ) ! !" $ !" 8 C -T- D M K " ! #! J F ! Case 648-08 N Suffix 16-Pin Plastic R X 45° G " ! ) #! P ! " " 9 -B- ! 16 & ! ! ° ° ° ° ( ( ( ( "! ! " " ! ! ' " " ! ' ! " # & -A- 16 9 1 8 ! ! $ ! B # ) " ! " # ) !" $ !" ) F L C S -T- K H G M J D " Case 620-09 J Suffix 16-Pin Ceramic Dual In-Line -A- ! ! ! ! ° ° ° ° "! ! " 16 " ) " L K M N J G D " $ " $ ! " " ! ! FAST AND LS TTL DATA 5-601 & # ) !" $ !" ) -T $ " " C F & 8 E ! ! ! " " -B1 & 9 * * ! ! ! ! * * ! ° ° ! ° ° Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. “Typical” parameters can and do vary in different applications. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. 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Motorola and are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal Opportunity/Affirmative Action Employer. Literature Distribution Centers: USA: Motorola Literature Distribution; P.O. Box 20912; Phoenix, Arizona 85036. EUROPE: Motorola Ltd.; European Literature Centre; 88 Tanners Drive, Blakelands, Milton Keynes, MK14 5BP, England. JAPAN: Nippon Motorola Ltd.; 4-32-1, Nishi-Gotanda, Shinagawa-ku, Tokyo 141, Japan. ASIA PACIFIC: Motorola Semiconductors H.K. Ltd.; Silicon Harbour Center, No. 2 Dai King Street, Tai Po Industrial Estate, Tai Po, N.T., Hong Kong. ◊ FAST AND LS TTL DATA 5-602