1-OF-8 DECODERS
CY54FCT138T, CY74FCT138T 1-OF-8 DECODERS
D Function, Pinout, and Drive Compatible
With FCT and F Logic
D Reduced VOH (T...
Description
CY54FCT138T, CY74FCT138T 1-OF-8 DECODERS
D Function, Pinout, and Drive Compatible
With FCT and F Logic
D Reduced VOH (Typically = 3.3 V) Versions of
Equivalent FCT Functions
D Edge-Rate Control Circuitry for
Significantly Improved Noise
Characteristics
D Ioff Supports Partial-Power-Down Mode
Operation
D Matched Rise and Fall Times D Fully Compatible With TTL Input and
Output Logic Levels
D Dual 1-of-8 Decoder With Enables 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 CY54FCT138T
– 32-mA Output Sink Current
– 12-mA Output Source Current
D CY74FCT138T
– 64-mA Output Sink Current
– 32-mA Output Source Current
NC NC
O6 O5
SCCS013B – MAY 1994 – REVISED OCTOBER 2001
CY54FCT138T . . . D PACKAGE CY74FCT138T . . . Q OR SO PACKAGE
(TOP VIEW)
A0 A1 A2 E1 E2 E3 O7 GND
1 2 3 4 5 6 7 8
16 VCC 15 O0 14 O1 13 O2 12 O3 11 O4 10 O5 9 O6
CY54FCT138T . . . L PACKAGE (TOP VIEW)
VCC O0
3 2 1 20 19
A2 4
18 O1
E1 5
17 O2
NC 6
16 NC
E2 7
15 O3
E3 8
14 O4
9 10 11 12 13
O7 A1 GND A0
description
NC – No internal connection
The ’FCT138T devices are 1-of-8 decoders. These devices accept three binary weighted inputs (A0, A1, A2) and, when enabled, provide eight mutually exclusive active-low outputs (O0–O7). The ’FCT138T devices feature three enable inputs: two active low (E1, E2) and one active high (E3).
All outputs are high unless E1 and E2 are low and E3 is high. This multiple-enable fun...
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