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Details, datasheet, quote on part number:SN74BCT29825DWR
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Datasheet text preview:
SN54BCT29825, SN74BCT29825 8-BIT BUS-INTERFACE FLIP-FLOPS WITH 3-STATE OUTPUTS
SCBS075A SEPTEMBER 1991 REVISED NOVEMBER 1993
· · · ·
State-of-the-Art BiCMOS Design Significantly Reduces ICCZ ESD Protection Exceeds 2000 V Per MIL-STD-883C, Method 3015; Exceeds 200 V Using Machine Model (C = 200 pF, R = 0) 3-State Buffer-Type Outputs Drive Bus Lines Directly Package Options Include Plastic Small-Outline Packages (DW), Ceramic Chip Carriers (FK) and Flatpacks (W), and Standard Plastic and Ceramic 300-mil DIPs (JT, NT)
SN54BCT29825 . . . JT OR W PACKAGE SN74BCT29825 . . . DW OR NT PACKAGE (TOP VIEW)
description
These 8-bit bus-interface flip-flops feature 3-state outputs designed specifically for driving highly capacitive or relatively low-impedance loads. They are particularly suitable for implementing wider buffer registers, I/O ports, bidirectional bus drivers with parity, and working registers. The eight flip-flops are edge-triggered D-type flip-flops. With the clock-enable (CLKEN) input low, the device enters data on the low-to-high transition of the clock. Taking CLKEN high disables the clock buffer, thus latching the outputs. Taking the clear (CLR) input low causes the eight Q outputs to go low independently of the clock. Buffered output-enable (OE1, OE2, or OE3) inputs can be used to place the eight outputs in either a normal logic state (high or low) 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. The output-enable inputs do not affect the internal operation of the flip-flops. Old data can be retained or new data can be entered while the outputs are in the high-impedance state. The SN54BCT29825 is characterized for operation over the full military temperature range of 55°C to 125°C. The SN74BCT29825 is characterized for operation from 0°C to 70°C.
OE1 OE2 1D 2D 3D 4D 5D 6D 7D 8D CLR GND
1 2 3 4 5 6 7 8 9 10 11 12
24 23 22 21 20 19 18 17 16 15 14 13
VCC OE3 1Q 2Q 3Q 4Q 5Q 6Q 7Q 8Q CLKEN CLK
SN54BCT29825 . . . FK PACKAGE (TOP VIEW)
1D OE2 OE1 NC VCC
5 6 7 8 9 10 4 32
2D 3D 4D NC 5D 6D 7D
1 28 27 26 25 24 23 22 21
OE3 1Q 2Q 3Q 4Q NC 5Q 6Q 7Q
20 11 19 12 13 14 15 16 17 18
NC No internal connection
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.
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
8D CLR GND NC CLK CLKEN 8Q
Copyright © 1993, Texas Instruments Incorporated
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SN54BCT29825, SN74BCT29825 8-BIT BUS-INTERFACE FLIP-FLOPS WITH 3-STATE OUTPUTS
SCBS075A SEPTEMBER 1991 REVISED NOVEMBER 1993
FUNCTION TABLE INPUTS OE L L L L CLR L H H H CLKEN X L L H CLK X H or L D X H L X OUTPUT Q L H L Q0
H X X X X Z OE = H if any of the output-enable inputs is high. OE = L if all of the output-enable inputs are low.
logic symbol
1 OE1 OE2 OE3 CLR CLKEN CLK 1D 2D 3D 4D 5D 6D 7D 8D 2 23 11 14 13 3 4 5 6 7 8 9 10 R G1 1C2 2D 22 21 20 19 18 17 16 15 1Q 2Q 3Q 4Q 5Q 6Q 7Q 8Q & EN
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. Pin numbers shown are for the DW, JT, NT, and W packages.
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POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
SN54BCT29825, SN74BCT29825 8-BIT BUS-INTERFACE FLIP-FLOPS WITH 3-STATE OUTPUTS
SCBS075A SEPTEMBER 1991 REVISED NOVEMBER 1993
logic diagram (positive logic)
1 OE1 OE2 OE3 CLR CLKEN 2 23 11 14
CLK 1D
13 3
R C1 1D
22
1Q
To Seven Other Channels Pin numbers shown are for the DW, JT, NT, and W packages.
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) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 V to 7 V 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 Input clamp current, IIK (VI < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 mA Current into any output in the low state, IO: SN54BCT29825 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 mA SN74BCT29825 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96 mA Operating free-air temperature range: SN54BCT29825 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55°C to 125°C SN74BCT29825 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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 and output negative-voltage ratings may be exceeded if the input and output clamp-current ratings are observed.
recommended operating conditions
SN54BCT29825 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 55 4.5 2 0.8 18 15 24 125 0 NOM 5 MAX 5.5 SN74BCT29825 MIN 4.5 2 0.8 18 24 48 70 NOM 5 MAX 5.5 UNIT V V V mA mA mA °C
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
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