SN74ACT3638PCB datasheet(24/30 Pages) TI

24 / 30 page

SN74ACT3638

512

× 32 × 2

CLOCKED BIDIRECTIONAL FIRST-IN, FIRST-OUT MEMORY

SCAS228D – JUNE 1992 – REVISED APRIL 1998

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

CLKB

CSB

W/RA

MBB

ENB

A0 – A31

CLKA

CSA

MBF2

W/RB

MBA

ENA

B0 – B31

tsu(EN)

th(D)

th(EN)

tsu(D)

th(EN)

tsu(EN)

tpd(C-MF)

FIFO2 Output Register

W1 (remains valid in mail2 register after read)

ten

tpd(C-MR)

tdis

tpd(M-DV)

Figure 22. Timing for Mail2 Register and MBF2 Flag

absolute maximum ratings over operating free-air temperature range (unless otherwise noted)†

Supply voltage range, VCC

– 0.5 V to 7 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Input voltage range, VI (see Note 1)

– 0.5 V to VCC + 0.5 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Output voltage range, VO (see Note 1)

– 0.5 V to VCC + 0.5 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Input clamp current, IIK (VI < 0 or VI > VCC)

±20 mA

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Output clamp current, IOK (VO < 0 or VO > VCC)

±50 mA

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Continuous output current, IO (VO = 0 to VCC)

±50 mA

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Continuous current through VCC or GND

±400 mA

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Package thermal impedance,

qJA (see Note 2): PCB package

°C/W

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PQ package

°C/W

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Storage temperature range, Tstg

–65

°C to 150°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

† Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and

functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not

implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

NOTES:

1. The input and output voltage ratings may be exceeded provided the input and output current ratings are observed.

2. The package thermal impedance is calculated in accordance with JESD 51.

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