74ACT8244 RELAY DRIVER IC ■ ■ ■ ■ ■ OPERATES 4 LATCHING RELAIS, 1 SINGLE SIDE STABLE RELAY AND 1 LED VERY LOW POWER CONSUMPTION TTL COMPATIBLE INPUT THRESHOLDS IMPROVED LATCH-UP IMMUNITY UP TO 300mA TSSOP-20 PACKAGE DESCRIPTION The device is a relais driver for line card application. It is able to operate four latching relais, one single side stable relay and one LED connected either to GND or VCC. All the outputs can be set to LOW with the RST input as shown in the true table. PIN DESCRIPTION PIN No SYMBOL ORDER CODES : 74ACT8244TTR LOGIC DIAGRAM NAME AND F UNCTION 1 RST Master Reset 2 IN1A Input of 1st latched relay drv 3 IN1B Input of 1st latched relay drv 4 IN2A Input of 2nd latched relay drv 5 IN2B Input of 2nd latched relay drv 6 IN3A Input of 3rd latched relay drv 7 IN3B Input of 3rd latched relay drv 8 IN4 Input of 1st relay driver 9 IN5 Input LED driver 10 GND 11 NC Ground Not Connected 12 OUT5 Output of LED driver 13 OUT4 Output of 1st relay driver 14 OU3B Output 3rd latched relay drv 15 OU3A Output 3rd latched relay drv 16 OU2B Output 2nd latched relay drv 17 OU2A Output 2nd latched relay drv 18 OU1B Output 1st latched relay drv 19 OU1A Output 1st latched relay drv 20 VCC November 1999 T (TSSOP Package) Supply Voltage 1/6 74ACT8244 ABSOLUTE MAXIMUM RATINGS Symbol Parameter Supply Voltage VCC Value Unit -0.5 to +7 V VI DC Input Voltage -0.5 to VCC + 0.5 V VO DC Output Voltage -0.5 to VCC + 0.5 V IIK DC Input Diode Current ± 50 mA IOK DC Output Diode Current ± 50 mA IO DC Output Current ± 100 mA DC VCC or Ground Current ± 400 mA ICC orIGND Tstg Storage Temperature o -65 to +150 C Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied. RECOMMENDED OPERATING CONDITIONS Symbol Parameter Unit 4.75 to 5.25 V VI Input Voltage 0 to VCC V VO Output Voltage 0 to VCC VCC Top dt/dv Supply Voltage Value Operating Temperature: V o -30 to +80 Input Rise and Fall Time VCC = 4.5 to 5.5V (note1) C 10 ns/V 1) VIN from 0.8 V to 2.0 V DC SPECIFICATIONS (Electrical characteristics over recommended operating conditions) Symb ol VIH High Level Input Threshold Test Co nditi ons V O = 0.1 V or V CC - 0.1 V VIL Low Level Input Threshold V O = 0.1 V or V CC - 0.1 V VOH High Level Output Voltage for Single Driver I OUT = -35mA VOL Low Level Output Voltage for Single Driver I OUT = 35mA VOH High Level Output Voltage for Double Relay Driver I OUT = -70mA VOL Low Level Output Voltage for Double Relay Driver I OUT = 70mA VOH High Level Output Voltage for Single Side Relay or LED I OUT = -50mA VOL Low Level Output Voltage for Single Side Relay or LED I OUT = 50mA Input Leakage Current V I = VCC or GND ICCT Max ICC /Input V I = VCC -2.1 V ICC Quiescent Supply Current V I = VCC or GND II 2/6 Parameter Value Min. T yp. 2.0 1.4 1.4 Un it Max. V 0.8 VCC-0.68 VCC-0.3 0.25 0.68 VCC-0.68 VCC-0.3 0.25 V V V V 0.68 VCC-0.8 VCC-0.4 V V 0.3 0.8 V ±1 µA 0.6 1.5 mA 4 40 µA 74ACT8244 AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, RL = 500 Ω, Input tr = tf =3 ns) Symb ol Parameter T est Cond it ion Min. tPLH tPHL Propagation Delay Time Over recommended operating conditions TRUTH TABLE FOR LATCHING RELAY DRIVER INPUT OUT PUT Un it Max. 11.0 OUTPUT Co nditi on IN4 OUT 4 L H Storage H L INn A INn B H X X OUnA OUnB L L L L L L Storage L L H L H Operate L H L H L Release L H H H H Storage Z = High Impedance X = Don’t Care n = 1,2,3 ns TRUTH TABLE FOR SINGLE SIDE RELAY INPUT RST L Valu e T yp. 7.0 TRUTH TABLE FOR LED DRIVER INPUT OUTPUT IN5 OUT 5 L H H L OUTPUT CIRCUIT FOR LATCHING RELAY DRIVER OUTPUT CIRCUIT FOR SINGLE SIDE RELAY OUTPUT CIRCUIT FOR LED DRIVER 3/6 74ACT8244 Output Characteristics of a Double Relay Driver N-channel with All Outputs Loaded Output Characteristics of a Double Relay Driver P-channel with All Outputs Loaded Output Characteristics of a Single Side Relay or Led Driver N-channel with All Outputs Loaded Output Characteristics of a Single Side Relay or Led Driver P-channel with All Outputs Loaded 4/6 74ACT8244 TSSOP20 MECHANICAL DATA mm DIM. MIN. inch TYP. MAX. A MIN. TYP. MAX. 1.1 0.433 A1 0.05 0.10 0.15 0.002 0.004 0.006 A2 0.85 0.9 0.95 0.335 0.354 0.374 b 0.19 0.30 0.0075 0.0118 c 0.09 0.2 0.0035 0.0079 D 6.4 6.5 6.6 0.252 0.256 0.260 E 6.25 6.4 6.5 0.246 0.252 0.256 E1 4.3 4.4 4.48 0.169 0.173 0.176 e 0.65 BSC 0.0256 BSC K 0o 4o 8o 0o 4o 8o L 0.50 0.60 0.70 0.020 0.024 0.028 A A2 A1 b K e L E c D E1 PIN 1 IDENTIFICATION 1 5/6 74ACT8244 Information furnished is believed to be accurate and reliable. However, STMicroelectronic s assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronic s. Specification mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems withoutexpress written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics 1999 STMicroelectronics – Printed in Italy – All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - China - Finland - France - Germany - Hong Kong - India - Italy - Japan- Malaysia - Malta - Morocco Singapore - Spain - Sweden - Switzerland - United Kingdom - U.S.A. http://www.st.com . 6/6