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Part: SN74AHC374NSR
Category:
Logic
-> Flip-Flops
-> D-Type (3-State) Flip-Flops
Description: ti SN74AHC374, Octal Edge-triggered D-type Flip-flops With 3-State Outputs
Company: Texas Instruments, Inc.
Datasheet: Download SN74AHC374NSR datasheet File size : 214 kB
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Datasheet text preview:
SN54AHC374, SN74AHC374 OCTAL EDGE-TRIGGERED D-TYPE FLIP-FLOPS WITH 3-STATE OUTPUTS
SCLS240I OCTOBER 1995 REVISED JULY 2003
D D D
Operating Range 2-V to 5.5-V VCC 3-State Outputs Drive Bus Lines Directly Latch-Up Performance Exceeds 250 mA Per JESD 17
D
ESD Protection Exceeds JESD 22 2000-V Human-Body Model (A114-A) 200-V Machine Model (A115-A) 1000-V Charged-Device Model (C101)
SN54AHC374 . . . FK PACKAGE (TOP VIEW)
1D 1Q OE VCC 2D 2Q 3Q 3D 4D
SN54AHC374 . . . J OR W PACKAGE SN74AHC374 . . . DB, DGV, DW, N, NS, OR PW PACKAGE (TOP VIEW)
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
VCC 8Q 8D 7D 7Q 6Q 6D 5D 5Q CLK
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
description/ordering information
The 'AHC374 devices are octal edge-triggered D-type flip-flops that feature 3-state outputs designed specifically for driving highly capacitive or relatively low-impedance loads. These devices are particularly suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers. On the positive transition of the clock (CLK) input, the Q outputs are set to the logic levels of 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 the 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 interface or pullup components. ORDERING INFORMATION
TA PDIP N SOIC DW DW 40°C to 85°C to 85°C SOP NS SSOP DB TSSOP PW PW TVSOP DGV CDIP J 55°C to 125°C CFP W LCCC FK PACKAGE Tube Tube Tape and reel Tape and reel Tape and reel Tube Tape and reel Tape and reel Tube Tube Tube ORDERABLE PART NUMBER SN74AHC374N SN74AHC374DW SN74AHC374DWR SN74AHC374NSR SN74AHC374DBR SN74AHC374PW SN74AHC374PWR SN74AHC374DGVR SNJ54AHC374J SNJ54AHC374W SNJ54AHC374FK TOP-SIDE MARKING SN74AHC374N AHC374 AHC374 HA374 HA374 HA374 SNJ54AHC374J SNJ54AHC374W SNJ54AHC374FK
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package.
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.
Copyright 2003, Texas Instruments Incorporated
On products compliant to MIL-PRF-38535, all parameters are tested unless otherwise noted. On all other products, production processing does not necessarily include testing of all parameters.
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
4Q GND CLK 5Q 5D
1
SN54AHC374, SN74AHC374 OCTAL EDGE-TRIGGERED D-TYPE FLIP-FLOPS WITH 3-STATE OUTPUTS
SCLS240I OCTOBER 1995 REVISED JULY 2003
description/ordering information (continued)
OE 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. To ensure the high-impedance state during power up or power down, 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.
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
logic diagram (positive logic)
OE 1
CLK
11 C1 2
1D
3
1D
1Q
To Seven Other Channels
2
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
SN54AHC374, SN74AHC374 OCTAL EDGE-TRIGGERED D-TYPE FLIP-FLOPS WITH 3-STATE OUTPUTS
SCLS240I OCTOBER 1995 REVISED JULY 2003
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 Output voltage range, VO (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 V to VCC + 0.5 V Input clamp current, IIK (VI VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA Continuous output current, IO (VO = 0 to VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±25 mA Continuous current through VCC or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±75 mA Package thermal impedance, JA (see Note 2): DB package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70°C/W DGV package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92°C/W DW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58°C/W N package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69°C/W NS package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60°C/W PW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83°C/W 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. NOTES: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed. 2. The package thermal impedance is calculated in accordance with JESD 51-7.
recommended operating conditions (see Note 3)
SN54AHC374 MIN VCC VIH Supply voltage High-level input voltage VCC = 2 V VCC = 3 V VCC = 5.5 V VCC = 2 V VIL VI VO IOH Low-level input voltage Input voltage Output voltage High-level output current VCC = 2 V VCC = 3.3 V ± 0.3 V VCC = 5 V ± 0.5 V VCC = 2 V IOL Low-level output current VCC = 3.3 V ± 0.3 V VCC = 5 V ± 0.5 V VCC = 3.3 V ± 0.3 V VCC = 5 V ± 0.5 V VCC = 3 V VCC = 5.5 V 0 0 2 1.5 2.1 3.85 0.5 0.9 1.65 5.5 VCC 50 4 8 50 4 8 100 20 0 0 MAX 5.5 SN74AHC374 MIN 2 1.5 2.1 3.85 0.5 0.9 1.65 5.5 VCC 50 4 8 50 4 8 100 20 V V V V MAX 5.5 UNIT V
mA
mA
mA
mA ns/V
t/v
Input transition rise or fall rate transition rise or fall rate
TA Operating free-air temperature 55 125 40 85 °C NOTE 3: All unused inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report, Implications of Slow or Floating CMOS Inputs, literature number SCBA004.
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
3
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