Tektronix DC 502

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DC

502

ELECTRICAL

PARTS

LIST

(cont)

Ckt.

No.

Tektronix

Part

No.

Serial/Model

No.

Eff

Disc

Description

INTEGRATED

CIRCUITS

(cont)

U246

F2

156-0043-00

Quad

2-input

positive

nor

gate,

replaceable

by

SN7402N

U250

E3

156-0198-00

Quad

latch,

replaceable

by

MC4035P

U251

D3

156-0198-00

Quad

latch,

replaceable

by

MC4035P

U252

C4

156-0198-00

Quad

latch,

replaceable

by

MC4035P

U253

B3

156-0198-00

Quad

latch,

replaceable

by

MC4035P

U254

B2

156-0198-00

Quad

latch,

replaceable

by

MC4035P

U255

C2

156-0198-00

Quad

latch,

replaceable

by

MC4035P

U256

D2

156-0198-00

Quad

latch,

replaceable

by

MC4035P

U260

M

1

156-0030-00

Quad

2-input

positive

nand

gate,

replaceable

by

SN7400N

U262

K2

156-0041-00

Dual

15

MHz

D-type

pos-edge-trig

flip-flop,

replaceable

by

SN7474N

U263

L2

156-0041-00

Dual

15

MHz

D-type

pos-edge-trig

flip-flop,

replaceable

by

SN7474N

U265

El

156-0111-00

Single

BCD-to-decimal

decoder/driver

,

replaceable

by

SN74145N

U267

E2

156-0058-00

Hex.

inverter,

replaceable

by

SN7404N

U270

H2

156-0128-00

Single

BCD-to-seven-segment

decoder/driver

,

replaceable

by

SN7447N

U300

C6

156-0071-00

Voltage

regulator,

replaceable

by

UA723C

U320

B6

156-0071-00

Voltage

regulator,

replaceable

by

UA723C

CRYSTALS

Y200

F5

158-0079-00

Crystal,

1

MHz

Y201

1

F6

119-0262-00

Oscillator,

RF,

5

MHz

■''Option

1

only.

3-8