Homedatasheet5962-9676901Q3A

5962-9676901Q3A Datasheet

D-Type (3-State) Latches
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Description

Features, Applications

State-of-the-Art EPIC-B TM BiCMOS Design Significantly Reduces Power Dissipation ESD Protection Exceeds 2000 V Per MIL-STD-883, Method 3015; Exceeds 200 V Using Machine Model = 200 pF, = 0) Latch-Up Performance Exceeds 500 mA Per JEDEC Standard JESD-17 Typical VOLP (Output Ground Bounce) V at VCC = 25�C High-Impedance State During Power Up and Power Down High-Drive Outputs (�32-mA IOH, 64-mA IOL) Package Options Include Plastic Small-Outline (DW), Shrink Small-Outline (DB), and Thin Shrink Small-Outline (PW) Packages, Ceramic Chip Carriers (FK), Ceramic Flat (W) Package, and Plastic (NT) and Ceramic (JT) DIPs

description

The SN54ABT841 and SN74ABT841A 10-bit latches are designed specifically for driving highly capacitive or relatively low-impedance loads. They are particularly suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers. The ten transparent D-type latches provide true data at their outputs. A buffered output-enable (OE) input can be used to place the ten 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 does not affect the internal operations of the latch. Previously stored data can be retained or new data can be entered while the outputs are in the high-impedance state. When VCC is between 0 and 2.1 V, the device is in the high-impedance state during power up or power down. However, to ensure the high-impedance state above V, OE should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver. The SN54ABT841 is characterized for operation over the full military temperature range to 125�C. The SN74ABT841A is characterized for operation from to 85�C.

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. EPIC-B is a trademark of Texas Instruments Incorporated.

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.

This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. Pin numbers shown are for the DB, DW, JT, NT, PW, and W packages.

To Seven Other Channels Pin numbers shown are for the DB, DW, JT, NT, PW, and W packages.
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)

Supply voltage range, VCC. 7 V Input voltage range, VI (see Note 7 V Voltage range applied to any output in the high or power-off state, VO. 5.5 V Current into any output in the low state, IO: 128 mA Input clamp current, IIK (VI �18 mA Output clamp current, IOK (VO �50 mA Package thermal impedance, JA (see Note 2): DB package. 104�C/W DW package. 81�C/W NT package. 67�C/W PW package. 120�C/W Storage temperature range, Tstg. 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. NOTES: 1. The input and output negative-voltage ratings may be exceeded if the input and output clamp-current ratings are observed. 2. The package thermal impedance is calculated in accordance with EIA/JEDEC Std JESD51, except for through-hole packages, which use a trace length of zero.

SN54ABT841 MIN VCC VIH VIL VI IOH IOL t/v t/VCC Supply voltage High-level input voltage Low-level input voltage Input voltage High-level output current Low-level output current Input transition rise or fall rate Power-up ramp rate VCC MAX 5.5 SN74ABT841A MIN 2 0.8 VCC 64 5 MAX 5.5 UNIT mA ns/V �s/V �C

TA Operating free-air temperature NOTE 3: Unused inputs must be held high or low to prevent them from floating.


Features

Parameters

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