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Details, datasheet, quote on part number:SN74AS4374BN
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| Part: | SN74AS4374BN |
| Category: | Logic => Flip-Flops => D-Type (3-State) Flip-Flops |
| Description: | ti SN74AS4374B, Octal Edge-triggered D-type Dual-rank Flip-flops With 3-State Outputs |
| Company: | Texas Instruments, Inc. |
| Datasheet: | Download SN74AS4374BN datasheet File size : 79 kB |
| Request For quote: | Find where to buy SN74AS4374BN
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Datasheet text preview:
SN74AS4374B OCTAL EDGE-TRIGGERED D-TYPE DUAL-RANK FLIP-FLOP WITH 3-STATE OUTPUTS
SDAS109D APRIL 1989 REVISED JANUARY 1995
· ·
3-State Outputs Drive Bus Lines Directly Package Options Include Plastic Small-Outline (DW) Packages and Standard Plastic (N) 300-mil DIPs
DW OR N PACKAGE (TOP VIEW)
description
This 8-bit flip-flop features 3-state outputs designed specifically for driving highly capacitive or relatively low-impedance loads. It is particularly suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers. The eight flip-flops of the SN74AS4374B are edge-triggered D-type flip-flops. On the second positive transition of the clock (CLK) input, the Q outputs are set to the logic levels set up at the data (D) inputs.
1Q 2Q 3Q 4Q GND 5Q 6Q 7Q 8Q OE
1 2 3 4 5 6 7 8 9 10
20 19 18 17 16 15 14 13 12 11
1D 2D 3D 4D VC C 5D 6D 7D 8D CLK
The output-enable (OE) input does not affect internal operations of the flip-flops. Previously stored data can be retained or new data can be entered while the outputs are in the high-impedance state. The SN74AS4374B is characterized for operation from 0°C to 70°C.
FUNCTION TABLE (each flip-flop) INPUTS OE H L L L CLK X L D X L H X OUTPUT Q Z L H Q0
Data presented at the D inputs require two clock cycles to appear at the Q outputs.
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 © 1995, Texas Instruments Incorporated
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
1
SN74AS4374B OCTAL EDGE-TRIGGERED D-TYPE DUAL-RANK FLIP-FLOP WITH 3-STATE OUTPUTS
SDAS109D APRIL 1989 REVISED JANUARY 1995
logic symbol
OE CLK 10 11 EN C1 1 2 3 4 6 7 8 9
logic diagram (positive logic)
OE CLK 10 11
1D 2D 3D 4D 5D 6D 7D 8D
20 19 18 17 15 14 13 12
1D
1D
1Q 2Q 3Q 4Q 5Q 6Q 7Q 8Q 1D
C1 20 1D
C1 1D
1
1Q
To Seven Other Channels
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Input voltage, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 V Voltage applied to any output in the high state or power-off state, VO . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 V Operating free-air temperature range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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.
recommended operating conditions
MIN VCC VIH VIL IOH IOL TA Supply voltage High-level input voltage Low-level input voltage High-level output current Low-level output current Operating free-air temperature 0 4.5 2 0.8 15 48 70 NOM 5 MAX 5.5 UNIT V V V mA mA °C
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POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
SN74AS4374B OCTAL EDGE-TRIGGERED D-TYPE DUAL-RANK FLIP-FLOP WITH 3-STATE OUTPUTS
SDAS109D APRIL 1989 REVISED JANUARY 1995
electrical characteristics over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER VIK VOH VOL IOZH IOZL II IIH IIL IO TEST CONDITIONS VCC = 4.5 V, VCC = 4 5 V 4.5 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, II = 18 mA IOH = 3 mA IOH = 15 mA IOL = 32 mA IOL = 48 mA VO = 2.7 V VO = 0.4 V VI = 7 V VI = 2.7 V VI = 0.5 V VO = 2.25 V OE high 30 MIN 2.4 2 0.25 0.35 0.4 0.5 20 20 0.1 20 0.2 112 TYP 3.2 MAX 1.5 UNIT V V V µA µA mA µA mA mA
ICC VCC = 5.5 V, 100 150 mA All typical values are at VCC = 5 V, TA = 25°C. The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS.
timing requirements over recommended operating free-air temperature range (unless otherwise noted)
MIN fclock tw tsu th Clock frequency Pulse duration, CLK high or low Setup time, data before CLK Hold time, data after CLK 0 4 4 1 MAX 125 UNIT MHz ns ns ns
switching characteristics (see Figure 1)
VCC = 4.5 V to 5.5 V, CL = 50 pF, R1 = 500 , R2 = 500 , TA = MIN to MAX§ MIN fmax tPLH tPHL tPZH tPZL tPHZ 125 CLK 2 Q Q 2 1.5 OE 2.5 8 8 6 8 6.5 7 MAX MHz ns ns ns
PARAMETER
FROM (INPUT)
TO (OUTPUT)
UNIT
2 OE Q tPLZ 2.5 § For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
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