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Part: SNJ54F374J
Category:
Logic
-> Flip-Flops
-> D-Type (3-State) Flip-Flops
Description: ti SN54F374, Octal Edge-triggered D-type Flip-flops With 3-State Outputs
Company: Texas Instruments, Inc.
Datasheet: Download SNJ54F374J datasheet File size : 214 kB
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Datasheet text preview:
SN54F374, SN74F374 OCTAL EDGE-TRIGGERED D-TYPE FLIP-FLOPS WITH 3-STATE OUTPUTS
SDFS077A D2932, MARCH 1987 REVISED OCTOBER 1993
· · · · ·
Eight D-Type Flip-Flops in a Single Package 3-State Bus-Driving True Outputs Full Parallel Access for Loading Buffered Control Inputs Package Options Include Plastic Small-Outline (SOIC) and Shrink Small-Outline (SSOP) Packages, Ceramic Chip Carriers, and Plastic and Ceramic DIPs
SN54F374 . . . J PACKAGE SN74F374 . . . DB, DW, OR N PACKAGE (TOP VIEW)
description
These 8-bit flip-flops feature 3-state outputs 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 eight flip-flops of the F374 are edge-triggered D-type flip-flops. On the positive transition of the clock (CLK) input, the Q outputs are set to the logic levels that were set up at the data (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) 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 the increased drive provide the capability to drive bus lines without need for interface or pullup components.
2D 2Q 3Q 3D 4D
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 CLK
SN54F374 . . . FK PACKAGE (TOP VIEW)
1D 1Q OE VCC
4 5 6 7 8
3 2 1 20 19 18 17 16 15 14 9 10 11 12 13
8Q 8D 7D 7Q 6Q 6D
The output enable (OE) input does not affect internal operations of the flip-flop. Old data can be retained or new data can be entered while the outputs are in the high-impedance state. The SN74F374 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 SN54F374 is characterized for operation over the full military temperature range of 55°C to 125°C. The SN74F374 is characterized for operation from 0°C to 70°C.
FUNCTION TABLE (each flip-flop) INPUTS OE L L L H CLK H or L X D H L X X OUTPUT Q H L Q0 Z
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.
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4Q GND CLK 5Q 5D
Copyright © 1993, Texas Instruments Incorporated
21
SN54F374, SN74F374 OCTAL EDGE-TRIGGERED D-TYPE FLIP-FLOPS WITH 3-STATE OUTPUTS
SDFS077A D2932, MARCH 1987 REVISED OCTOBER 1993
logic symbol
OE CLK 1 11 EN C1 2 5 6 9 12 15 16 19
logic diagram (positive logic)
OE CLK 1D 1 11 C1 3 2 1Q
1D 2D 3D 4D 5D 6D 7D 8D
3 4 7 8 13 14 17 18
1D
1Q 2Q 3Q 4Q 5Q 6Q 7Q 8Q
1D
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 range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 V to 7 V Input voltage range, VI (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2 V to 7 V Input current range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 mA to 5 mA Voltage range applied to any output in the disabled or power-off state . . . . . . . . . . . . . . . . . . . 0.5 V to 5.5 V Voltage range applied to any output in the high state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 V to VCC Current into any output in the low state: SN54F374 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 mA SN74F374 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 mA Operating free-air temperature range: SN54F374 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55°C to 125°C SN74F374 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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 voltage ratings may be exceeded provided the input current ratings are observed.
recommended operating conditions
SN54F374 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 3 20 125 0 NOM 5 MAX 5.5 SN74F374 MIN 4.5 2 0.8 18 3 24 70 NOM 5 MAX 5.5 UNIT V V V mA mA mA °C
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POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
SN54F374, SN74F374 OCTAL EDGE-TRIGGERED D-TYPE FLIP-FLOPS WITH 3-STATE OUTPUTS
SDFS077A D2932, MARCH 1987 REVISED OCTOBER 1993
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 IOZH IOZL II IIH IIL IOS 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, TEST CONDITIONS CONDITIONS II = 18 mA IOH = 1 mA IOH = 3 mA IOH = 1 mA to 3 mA IOL = 20 mA IOL = 24 mA VO = 2.7 V VO = 0.5 V VI = 7 V VI = 2.7 V VI = 0.5 V VO = 0 60 MIN SN54F374 TYP MAX 1.2 2.5 2.4 3.4 3.3 0.3 0.5 0.35 50 50 0.1 20 0.6 150 60 0.5 50 50 0.1 20 0.6 150 86 2.5 2.4 2.7 V µA µA mA µA mA mA mA 3.4 3.3 V MIN SN74F374 TYP MAX 1.2 UNIT V
ICCZ VCC = 5.5 V, See Note 2 55 86 55 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: ICCZ is measured with OE at 4.5 V and all other inputs grounded.
timing requirements over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
VCC = 5 V, TA = 25°C F374 MIN fclock tw tsu th Clock frequency Pulse duration duration Setup time, data before CLK time data before CLK Hold time data after CLK time, data after CLK CLK high CLK low High Low High Low 0 7 6 2 2 2 2 MAX 100 MIN 0 7 6 2.5 2 2 2.5 MAX 60 MIN 0 7 6 2 2 2 2 MAX 70 MHz ns SN54F374 SN74F374
UNIT
ns
ns
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
23
SN54F374, SN74F374 OCTAL EDGE-TRIGGERED D-TYPE FLIP-FLOPS WITH 3-STATE OUTPUTS
SDFS077A D2932, MARCH 1987 REVISED OCTOBER 1993
switching characteristics (see Note 3)
VCC = 5 V, CL = 50 pF, RL = 500 , TA = 25°C F374 MIN fmax tPLH tPHL tPZH tPZL tPHZ 100 CLK Q Q 3.2 3.2 1.2 1.2 6.1 6.1 8.6 5.4 8.5 8.5 11.5 7.5 TYP MAX VCC = 4.5 V to 5.5 V, CL = 50 pF, RL = 500 , TA = MIN to MAX SN54F374 MIN 60 3.2 3.2 1.2 1.2 10.5 11 14 10 MAX SN74F374 MIN 70 3.2 3.2 1.2 1.2 10 10 12.5 8.5 8 6.5 MAX MHz ns ns ns
PARAMETER
FROM (INPUT)
TO (OUTPUT)
UNIT
OE
1.2 4.9 7 1.2 8 1.2 OE Q tPLZ 1.2 3.9 5.5 1.2 7.5 1.2 For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions. NOTE 3: Load circuits and waveforms are shown in Section 1.
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· DALLAS, TEXAS 75265
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