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Details, datasheet, quote on part number:SN74F2373DB
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Datasheet text preview:
SN74F2373 25- OCTAL TRANSPARENT D-TYPE LATCH WITH 3-STATE OUTPUTS
SDFS100 JANUARY 1996
D D D D D
Eight Latches in a Single Package 3-State True Outputs With 25- Sink Resistors Full Parallel Access for Loading Buffered Control Inputs Package Options Include Plastic Small-Outline (DW), Shrink Small-Outline (DB) Packages, and Plastic (N) DIPs
DB, DW, OR N PACKAGE (TOP VIEW)
description
This 8-bit latch features 3-state outputs designed to sink up to 12 mA, and include 25- sink resitors to reduce overshoot and undershoot.
OE 1Q 1D 2D 2Q 3Q 3D 4D 4Q GND
1 2 3 4 5 6 7 8 9 10
20 19 18 17 16 15 14 13 12 11
VC C 8Q 8D 7D 7Q 6Q 6D 5D 5Q LE
The eight latches of the SN74F2373 are transparent D-type latches. While the latch-enable (LE) input is high, the Q outputs follow the data (D) inputs. When the LE is taken low, the Q outputs are latched at the logic levels set up at the D inputs. A buffered output-enable (OE) input can be used to place the eight outputs in either a normal logic state (high or low logic levels) or a high-impedance state. In the high-impedance state, the outputs neither load nor drive the bus lines significantly. The high-impedance state and increased drive provide the capability to drive bus lines without need for interface or pullup components. OE input does not affect the internal operations of the latches. Old data can be retained or new data can be entered while the outputs are in the high-impedance state. The SN74F373 is available in TI's shrink small-outline package (DB), which provides the same I/O pin count and functionality of standard small-outline packages in less than half the printed-circuit-board area. The SN74F373 is characterized for operation from 0°C to 70°C.
FUNCTION TABLE (each latch) INPUTS OE L L L H LE H H L X D H L X X OUTPUT Q H L Q0 Z
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.
Copyright © 1996, Texas Instruments Incorporated
POST OFFICE BOX 655303
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SN74F2373 25- OCTAL TRANSPARENT D-TYPE LATCH WITH 3-STATE OUTPUTS
SDFS100 JANUARY 1996
logic symbol
OE LE 1D 2D 3D 4D 5D 6D 7D 8D 1 11 3 4 7 8 13 14 17 18 EN C1 1D 2 5 6 9 12 15 16 19
logic diagram (positive logic)
OE LE 1Q 2Q 3Q 4Q 5Q 6Q 7Q 8Q To Seven Other Channels 1D 3 C1 1D 2 1Q 1 11
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
schematic diagram
VCC
Q 25 (nominal)
Typical Output Configuration
2
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
SN74F2373 25- OCTAL TRANSPARENT D-TYPE LATCH WITH 3-STATE OUTPUTS
SDFS100 JANUARY 1996
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 V to 7 V Input voltage range, VI (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2 V to 7 V Input current range, II . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 mA to 5 mA Voltage range applied to any output in the disabled or power-off state, VO . . . . . . . . . . . . . . . 0.5 V to 5.5 V Voltage range applied to any output in the high state, VO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 V to VCC Current into any output in the low state, IO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 mA Operating free-air temperature range,TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65°C to 150°C
Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. NOTE 1: The input voltage ratings may be exceeded if the input current ratings are observed.
recommended operating conditions
MIN VCC VIH VIL IIK IOH IOL TA Supply voltage High-level input voltage Low-level input voltage Input clamp current High-level output current Low-level output current Operating free-air temperature 0 4.5 2 0.8 18 3 12 70 NOM 5 MAX 5.5 UNIT V V V mA mA mA °C
electrical characteristics over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER VIK VOH VCC = 4.5 V, VCC = 4 5 V 4.5 VCC = 4.75 V, VOL IOZ(H) IOZ(L) II IIH IIL IOS§ ICC(H) ICC(L) ICC(Z) VCC = 4 5 V 4.5 VCC = 5.5 V, VCC = 5.5 V, VCC = 5.5 V, VCC = 5.5 V, VCC = 5.5 V, VCC = 5.5 V, VCC = 5.5 V, VCC = 5.5 V, TEST CONDITIONS II = 18 mA IOH = 1 mA IOH = 3 mA IOH = -1 mA to 3 mA IOL = 1 mA IOL = 12 mA VO = 2.7 V VO = 0.5 V VI = 7 V VI = 2.7 V VI = 0.5 V VO = 0 See Note 2, Condition A See Note 2, Condition B 60 38 46 MIN 2.5 2.4 2.7 0.2 0.5 0.5 0.75 50 50 0.1 20 0.6 150 55 66 62 V µA µA mA µA mA mA mA mA mA TYP 3.4 3.3 V MAX 1.2 UNIT V
VCC = 5.5 V, See Note 2, Condition C 43 All typical values are at VCC = 5 V, TA = 25°C. § Not more than one output should be shorted at a time, and the duration of the short circuit should not exceed one second. NOTE 2: ICC is measured with the outputs open under the following conditions: A. OE at ground (0) and all other inputs at 4.5 V. B. LE at 4.5 V and all other inputs grounded. C. OE at 4.5 V and all other inputs grounded.
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
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