CY54FCT480T_14 Datasheet, PDF (1/11 Pages) Texas Instruments – DUAL 8-BIT PARITY GENERATORS/CHECKERS

CY54FCT480T, CY74FCT480T
DUAL 8-BIT PARITY GENERATORS/CHECKERS
D Function, Pinout, and Drive Compatible
With FCT and F Logic
D Reduced V_OH (Typically = 3.3 V) Versions
of Equivalent FCT Functions
D Edge-Rate Control Circuitry for
Significantly Improved Noise
Characteristics
D I_off Supports Partial-Power-Down Mode
Operation
D Matched Rise and Fall Times
D Fully Compatible With TTL Input and
Output Logic Levels
D Two 8-Bit Parity Generators/Checkers
D Open-Drain Active-Low Parity-Error Output
D Expandable for Larger Word Widths
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)
D CY54FCT480T
– 32-mA Output Sink Current
– 12-mA Output Source Current
D CY74FCT480T
– 64-mA Output Sink Current
– 32-mA Output Source Current
description
SCCS025B – MAY 1993 – REVISED OCTOBER 2001
CY74FCT480T . . . P, Q, OR SO PACKAGE
(TOP VIEW)
A₁ 1
B₁ 2
C₁ 3
D₁ 4
E₁ 5
F₁ 6
G₁ 7
H₁ 8
PAR₁ 9
CHK/GEN 10
ODD₁ 11
GND 12
24 V_CC
23 A₂
22 B₂
21 C₂
20 D₂
19 E₂
18 F₂
17 G₂
16 H₂
15 PAR₂
14 ERROR
13 ODD₂
CY54FCT480T . . . L PACKAGE
(TOP VIEW)
4 3 2 1 28 27 26
D₁ 5
25 C₂
E₁ 6
24 D₂
F₁ 7
23 E₂
NC 8
22 NC
G₁ 9
21 F₂
H_{1 10}
20 G₂
PAR_{1 11}
19 H₂
12 13 14 15 16 17 18
The ’FCT480T devices are high-speed, dual,
8-bit parity generators/checkers. Each parity
generator/checker accepts eight data bits and
one parity bit as inputs, and generates a sum and
parity-error (ERROR) output. These devices can
NC – No internal connection
be used in odd-parity systems. ERROR is an
open-drain output designed for easy expansion of
the word width by a wired-OR connection of several ’FCT480T devices. Because no additional logic is needed,
the parity-generation or parity-checking times remain the same as for an individual ’FCT480T device.
These devices are fully specified for partial-power-down applications using I_off. The I_off circuitry disables the
outputs, preventing damaging current backflow through the device when it is powered down.
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.
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
Copyright  2001, 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.
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