SN54AHC138

Features:

􀀀 Operating Range 2-V to 5.5-V VCC
􀀀 Designed Specifically for High-Speed
    Memory Decoders and Data-Transmission
    Systems
􀀀 Incorporate Three Enable Inputs to Simplify
    Cascading and/or Data Reception
􀀀 Latch-Up Performance Exceeds 250 mA Per
    JESD 17
􀀀 ESD Protection Exceeds JESD 22
    2000-V Human-Body Model (A114-A)
    200-V Machine Model (A115-A)
    1000-V Charged-Device Model (C101)


Application

Audio
Automotive
Broadband
Digital Control
Military
Optical Networking
Security
Telephony
Video & Imaging
Wireless


Pinout




Specifications

Supply voltage range, V_CC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 V to 7 V
Input voltage range, V_I (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..0.5 V to 7 V
Output voltage range, V_O (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.5 V to V_CC + 0.5 V
Input clamp current, I_IK (V_I < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 mA
Output clamp current, I_OK (V_O < 0 or V_O > V_CC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA
Continuous output current, I_O (V_O = 0 to V_CC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..±25 mA
Continuous current through V_CC or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±75 mA
Package thermal impedance, _JA (see Note 2): D package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73°C/W
                                                    (see Note 2): DB package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82°C/W
                                                    (see Note 2): DGV package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120°C/W
                                                    (see Note 2): N package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67°C/W
                                                    (see Note 2): NS package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64°C/W
                                                    (see Note 2): PW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .108°C/W
                                                    (see Note 3): RGY package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39°C/W
Storage temperature range, T_stg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65°C to 150°C


Description

The SN54AHC138 decoders/demultiplexers are designed for high-performance memory-decoding and data-routing applications that require very short propagation-delay times. In high-performance memory systems, these decoders of SN54AHC138 can be used to minimize the effects of system decoding. When employed with high-speed memories utilizing a fast enable circuit, the delay times of these decoders and the enable time of the memory usually are less than the typical access time of the memory. This means that the effective system delay introduced by the decoders is negligible.