Programmable ROM
TMS27C240 262144 BY 16ĆBIT UV ERASABLE TMS27PC240 262144 BY 16ĆBIT
PROGRAMMABLE READĆONLY MEMORIES SMLS240D− NOVEMBER 19...
Description
TMS27C240 262144 BY 16ĆBIT UV ERASABLE TMS27PC240 262144 BY 16ĆBIT
PROGRAMMABLE READĆONLY MEMORIES SMLS240D− NOVEMBER 1990 − REVISED SEPTEMBER 1997
D Organization . . . 262 144 by 16 Bits
D Single 5-V Power Supply
D All Inputs / Outputs Fully TTL Compatible
D Static Operations (No Clocks, No Refresh)
D Max Access / Min Cycle Time
VCC ± 10% ’27C/ PC240-10
’27C/ PC240-12
’27C/ PC240-15
100 ns 120 ns 150 ns
D 16-Bit Output For Use in
Microprocessor-Based Systems
D Very High Speed SNAP! Pulse
Programming
D Power-Saving CMOS Technology
D 3-State Output Buffers
D 400-mV Minimum DC Noise Immunity With
Standard TTL Loads
D Latchup Immunity of 250 mA on All Input
and Output Lines
D No Pullup Resistors Required
D Low Power Dissipation ( VCC = 5.5 V )
− Active . . . 275 mW Worst Case
− Standby . . . 0.55 mW Worst Case
(CMOS-Input Levels)
D Temperature Range Options
TMS27PC240 FN PACKAGE ( TOP VIEW )
DQ13 DQ14 DQ15 E VPP NC VCC A17 A16 A15 A14
DQ12 DQ11 DQ10 DQ9 DQ8 GND†
NC DQ7 DQ6 DQ5 DQ4
6543 7 8 9 10 11 12 13 14 15 16 17
2 1 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29
18 19 20 21 22 23 24 25 26 27 28
A13 A12 A11 A10 A9 GND† NC A8 A7 A6 A5
DQ3 DQ2 DQ1 DQ0
G NC A0 A1 A2 A3 A4
PIN NOMENCLATURE
A0 −A17 DQ0 −DQ15 E G GND NC VCC VPP
Address Inputs Inputs (programming) / Outputs Chip Enable Output Enable Ground No Connection 5-V Supply 13-V Power Supply ‡
† Pins 11 and 30 (J package) and pins 12 and 34
(FN package) must be connected externally to
ground. ‡ Onl...
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