Help identifying IC

[fredsm]

Can anyone identify this IC? Preferably with a datasheet?

Numbering: MEM551C
Form factor: TO-5? w/8 leads
Pins 8,6,4, and 2 are common
Pins 1 and 7 appear to be inputs.
Pin 5 looks like the output.

TIA.
<als>

 

[Russlk]

The MEM551C is described as a MOS transistor. It may have been produced by General Instrument. A Google search will turn up a CD that can be bought that has a data sheet but I could not find one for free.

 

[eblc1388]

This is what I found from the Net.

MOSFETs; P-Ch; Enhancement
Part Number 	MEM551C
Military/High-Rel 	N
V(BR)DSS (V) 	25
V(BR)GSS (V) 	25
I(D) Max. (A) 	25m
I(DM) Max. (A) Pulsed I(D) 	
@Temp (øC) 	
IDM Max (@25øC Amb) 	
@Pulse Width (s) (Condition) 	
Absolute Max. Power Diss. (W) 	170m
Minimum Operating Temp (øC) 	
Maximum Operating Temp (øC) 	100õ
Thermal Resistance Junc-Case 	
Thermal Resistance Junc-Amb. 	
V(GS)th Max. (V) 	
V(GS)th (V) (Min) 	
@(VDS) (V) (Test Condition) 	
@I(D) (A) (Test Condition) 	
I(DSS) Max. (A) 	
@V(DS) (V) (Test Condition) 	
@Temp (øC) (Test Condition) 	
I(GSS) Max. (A) 	10p
@V(GS) (V) (Test Condition) 	
r(DS)on Max. (Ohms) 	400ò
@V(GS) (V) (Test Condition) 	
@I(D) (A) (Test Condition) 	
g(fs) Min. (S) Trans. conduct. 	500u
g(fs) Max; (S) Trans. conduct; 	
@V(DS) (V) (Test Condition) 	10
@I(D) (A) (Test Condition) 	
C(iss) Max. (F) 	8.0p
@V(DS) (V) (Test Condition) 	
@V(GS) (V) (Test Condition) 	
@Freq. (Hz) (Test Condition) 	
td(on) Max (s) On time delay 	
t(r) Max. (s) Rise time 	
t(d)off Max. (s) Off time 	
t(f) Max. (s) Fall time. 	
Package Style 	TO-77
Mounting Style 	T
Pinout Equivalence Code 7-24