TheTTL - Al Kossow's Bitsavers

SN54S189B, SN54S289B, SN74S189B, SN74S289B
64·BIT HIGH·PERFORMANCE
RANDOM·ACCESS MEMORIES
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, Vcc (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 7 V
Input voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 5.5 V
Off-State output voltage .................................................... 5.5 V
Operating free-air temperature range: SN54S' Circuits. . . . . . . . . . . . . . . . . . . .. - 55°C to 125°C
SN74S' Circuits ........................ ooe to 70°C
Storage temperature range ......................................... - 65°C to 150 °C
NOTE 1: Voltage values are with respect to network ground terminal.
recommended operating conditions
SN54S'
SN74S'
MIN NOM MAX MIN NOM MAX
Supply voltage, VCC 4.5 5 5.5 4.75 5 5.25 V
High-level output voltage, VOH I 'S289B 5.5 5.5 V
High-level output current, IOH I 'S189B -2 -6.5 mA
Low-level output current, IOL 16 16 mA
Width of write pulse (write enable low). tw(wr) 25 25 ns
Address before write pulse, tsu(da) 0+ o.
Setup time Data before end of write pulse, tsu(da) 25 t 25t ns
Chip-select before end of write pulse, tsu(S) 25 t 25t
Address after write pulse, th(ad) 3t ot
Hold time Data after write pulse, thIda) ot Ot ns
Chip-select after write pulse, thIS) Ot ot
Operating free-air temperature, T A -55 125 0 70 °c
f +The arrow indicates the transition of the write-enable input used for reference: t for the low-to-high transition, + for the high·to-Iow transition .
UNIT
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TEXAS ~
INSTRUMENTS
POST OFFICE BOX 225012 • DALLAS, TEXAS 75265
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